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Full vulnerability report · 2025
CVE-2025-5994High confidence

Cache poisoning via the ECS-enabled Rebirthday Attack

NLnet Labs · Unbound

8.7HighCVSS 4.0
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

1 package state
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu releaseSource packageVendor stateFixed versionEvidence
Ubuntu 24.04 LTSnoble · standard archiveunboundVendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.1.19.2-1ubuntu3.5Canonical record ↗Source updated 10 Sept 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2025-5994 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityunbound: Unbound Cache poisoning
11 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • unbound as a component of Red Hat Enterprise Linux 6
  • unbound-devel as a component of Red Hat Enterprise Linux 6
  • unbound-libs as a component of Red Hat Enterprise Linux 6
  • unbound-python as a component of Red Hat Enterprise Linux 6
  • unbound.src as a component of Red Hat Enterprise Linux 6
  • unbound as a component of Red Hat Enterprise Linux 7
  • unbound-devel as a component of Red Hat Enterprise Linux 7
  • unbound-libs as a component of Red Hat Enterprise Linux 7
  • unbound-python as a component of Red Hat Enterprise Linux 7
  • unbound.src as a component of Red Hat Enterprise Linux 7
  • openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4
Summary
A cache poisoning flaw was found in Unbound. Resolvers supporting EDNS Client Subnet (ECS) must segregate outgoing queries to accommodate different outgoing ECS information. This issue reopens resolvers to a birthday paradox attack, known as the Rebirthday Attack, which attempts to match the DNS transaction ID with cache non-ECS poisoned replies.
Remediation
For OpenShift Container Platform 4.12 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html/release_notes You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags. The sha value for the release is as follows: (For x86_64 architecture) The image digest is sha256:d26fd3fd30ac6ae13f2779045d4e2defbf77aa24db5393d91df19488fd42504d All OpenShift Container Platform 4.12 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html-single/updating_clusters/index#updating-cluster-within-minor.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2025-21730

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet (ECS). Unbound is also vulnerable when compiled with ECS support, i.e., '--enable-subnet', AND configured to send ECS information along with queries to upstream name servers, i.e., at least one of the 'send-client-subnet', 'client-subnet-zone' or 'client-subnet-always-forward' options is used. Resolvers supporting ECS need to segregate outgoing queries to accommodate for different outgoing ECS information. This re-opens up resolvers to a birthday paradox attack (Rebirthday Attack) that tries to match the DNS transaction ID in order to cache non-ECS poisonous replies.

What

A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet (ECS). Unbound is also vulnerable when compiled with ECS support, i.e., '--enable-subnet', AND configured to send ECS information along with queries to upstream name servers, i.e., at least one of the 'send-client-subnet', 'client-subnet-zone' or 'client-subnet-always-forward' options is used. Resolvers supporting ECS need to segregate outgoing queries to accommodate for different outgoing ECS information. This re-opens up resolvers to a birthday paradox attack (Rebirthday Attack) that tries to match the DNS transaction ID in order to cache non-ECS poisonous replies.

Why

The product, when processing trusted data, accepts any untrusted data that is also included with the trusted data, treating the untrusted data as if it were trusted.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet (ECS). Unbound is also vulnerable when compiled with ECS support, i.e., '--enable-subnet', AND configured to send ECS information along with queries to upstream name servers, i.e., at least one of the 'send-client-subnet', 'client-subnet-zone' or 'client-subnet-always-forward' options is used. Resolvers supporting ECS need to segregate outgoing queries to accommodate for different outgoing ECS information. This re-opens up resolvers to a birthday paradox attack (Rebirthday Attack) that tries to match the DNS transaction ID in order to cache non-ECS poisonous replies.

Why

The product, when processing trusted data, accepts any untrusted data that is also included with the trusted data, treating the untrusted data as if it were trusted.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Acceptance of Extraneous Untrusted Data With Trusted Data → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-349 ↗

CWE-349: Acceptance of Extraneous Untrusted Data With Trusted Data. The product, when processing trusted data, accepts any untrusted data that is also included with the trusted data, treating the untrusted data as if it were trusted.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/R:U/V:C

Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VIHighVulnerable-system integrity: A successful attack can cause a major loss.VANoneVulnerable-system availability: No direct loss is represented by this metric.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-349
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2026-0489Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Xerox FreeFlow Print Server ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

Official advisory
BSI · German · WID-SEC-W-2025-2043IBM QRadar SIEM: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um beliebigen Programmcode auszuführen, einen Denial of Service Zustand zu erzeugen, um Dateien zu manipulieren und um nicht nächer spezifizierte Auswirkungen zu erzielen..

Official advisory
BSI · German · WID-SEC-W-2025-1656Red Hat Enterprise Linux (unbound): Schwachstelle ermöglicht Manipulation von Daten

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux (unbound) ausnutzen, um Daten zu manipulieren.

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0969Multiples vulnérabilités dans les produits VMware

rg/CVERecord?id=CVE-2025-5914 Référence CVE CVE-2025-5915 https://www.cve.org/CVERecord?id=CVE-2025-5915 Référence CVE CVE-2025-5916 https://www.cve.org/CVERecord?id=CVE-2025-5916 Référence CVE CVE-2025-5917 https://www.cve.org/CVERecord?id=CVE-2025-5917 Référence CVE CVE-2025-5918 https://www.cve.org/CVERecord?id=CVE-2025-5918 Référence CVE CVE-2025-59375 https://www.cve.org/CVERecord?id=CVE-2025-59375 Référence CVE CVE-2025-59830 https://www.cve.org/CVERecord?id=CVE-2025-59830 Référence CVE CVE-2025-59842 https://www.cve.org/CVERecord?id=CVE-2025-59842 Référence CVE CVE-2025-5987 https://www.cve.org/CVERecord?id=CVE-2025-5987 Référence CVE CVE-2025-5994 https://www.cve.org/CVERecord?id=CVE-2025-5994 Référence CVE CVE-2025-6020 https://www.cve.org/CVERecord?id=CVE-2025-6020 Référence CVE CVE-2025-6021 https://www.cve.org/CVERecord?id=CVE-2025-6021 Référence CVE CVE-2025-6051 https://www.cve.org/CVERecord?id=CVE-2025-6051 Référence CVE CVE-2025-6052 https://www.cve.org/CVERecord?id=CVE-2025-6052 Référence CVE CVE-2025-6069 https://www.cve.org/CVERecord?id=CVE-2025-6069 Référence CVE CVE-2025-6141 https://www.cve.org/CVERecord?id=CVE-2025-6141 Référence CVE CVE-2025-6170 https://www.cve.org/CVERecord?id=CVE-2025-6170 Référence CVE CVE-2025-61748 https://www.cve.org/CVERecord?id=CVE-2025-61748

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0789Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2025-37914 Référence CVE CVE-2025-38085 https://www.cve.org/CVERecord?id=CVE-2025-38085 Référence CVE CVE-2025-38159 https://www.cve.org/CVERecord?id=CVE-2025-38159 Référence CVE CVE-2025-38200 https://www.cve.org/CVERecord?id=CVE-2025-38200 Référence CVE CVE-2025-38250 https://www.cve.org/CVERecord?id=CVE-2025-38250 Référence CVE CVE-2025-38380 https://www.cve.org/CVERecord?id=CVE-2025-38380 Référence CVE CVE-2025-50181 https://www.cve.org/CVERecord?id=CVE-2025-50181 Référence CVE CVE-2025-50182 https://www.cve.org/CVERecord?id=CVE-2025-50182 Référence CVE CVE-2025-5914 https://www.cve.org/CVERecord?id=CVE-2025-5914 Référence CVE CVE-2025-5994 https://www.cve.org/CVERecord?id=CVE-2025-5994 Référence CVE CVE-2025-6020 https://www.cve.org/CVERecord?id=CVE-2025-6020 Référence CVE CVE-2025-6032 https://www.cve.org/CVERecord?id=CVE-2025-6032 Référence CVE CVE-2025-7783 https://www.cve.org/CVERecord?id=CVE-2025-7783 Référence CVE CVE-2025-8194 https://www.cve.org/CVERecord?id=CVE-2025-8194 Gestion détaillée du document le 12 septembre 2025 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À propos Contact cyber.gouv.fr service-public.fr legifrance.gouv.fr info.gouv.fr france.fr info.gouv.fr/risques Premier Ministre / Secrétariat Général de la Déf

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
unbound as a component of Red Hat Enterprise Linux 6; unbound-devel as a component of Red Hat Enterprise Linux 6; unbound-libs as a component of Red Hat Enterprise Linux 6; unbound-python as a component of Red Hat Enterprise Linux 6; unbound.src as a component of Red Hat Enterprise Linux 6; unbound as a component of Red Hat Enterprise Linux 7; unbound-devel as a component of Red Hat Enterprise Linux 7; unbound-libs as a component of Red Hat Enterprise Linux 7; unbound-python as a component of Red Hat Enterprise Linux 7; unbound.src as a component of Red Hat Enterprise Linux 7; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4
Fixed
rhcos-x86_64-412.86.202510291903-0 as a component of Red Hat OpenShift Container Platform 4.12; rhcos-x86_64-413.92.202510150118-0 as a component of Red Hat OpenShift Container Platform 4.13; rhcos-aarch64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-ppc64le-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-s390x-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-x86_64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-aarch64-416.94.202609011112-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-ppc64le-416.94.202609011112-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-s390x-416.94.202609011112-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-x86_64-416.94.202609011112-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-aarch64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-ppc64le-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-s390x-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-x86_64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-aarch64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-ppc64le-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-s390x-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-x86_64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-aarch64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-ppc64le-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-s390x-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-x86_64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-aarch64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-ppc64le-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-s390x-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-x86_64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; python3-unbound-0:1.20.0-12.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); and 450 more
Action
For OpenShift Container Platform 4.12 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html/release_notes You may download the oc tool and use it to inspect release image metadata for x86_64, s390x, ppc64le, and aarch64 architectures. The image digests may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags. The sha value for the release is as follows: (For x86_64 architecture) The image digest is sha256:d26fd3fd30ac6ae13f2779045d4e2defbf77aa24db5393d91df19488fd42504d All OpenShift Container Platform 4.12 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html-single/updating_clusters/index#updating-cluster-within-minor.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 16 Jul 2025 · Last source change 3 Nov 2025, 18:13 UTC · CWE-349 · Acceptance of Extraneous Untrusted Data With Trusted Data

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2025-21730
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD not scheduled

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    unbound as a component of Red Hat Enterprise Linux 6; unbound-devel as a component of Red Hat Enterprise Linux 6; unbound-libs as a component of Red Hat Enterprise Linux 6; unbound-python as a component of Red Hat Enterprise Linux 6; unbound.src as a component of Red Hat Enterprise Linux 6; unbound as a component of Red Hat Enterprise Linux 7; unbound-devel as a component of Red Hat Enterprise Linux 7; unbound-libs as a component of Red Hat Enterprise Linux 7; unbound-python as a component of Red Hat Enterprise Linux 7; unbound.src as a component of Red Hat Enterprise Linux 7; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4 · Fixed: rhcos-x86_64-412.86.202510291903-0 as a component of Red Hat OpenShift Container Platform 4.12; rhcos-x86_64-413.92.202510150118-0 as a component of Red Hat OpenShift Container Platform 4.13; rhcos-aarch64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-ppc64le-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-s390x-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-x86_64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-aarch64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-ppc64le-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-s390x-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-x86_64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-aarch64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-ppc64le-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-s390x-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-x86_64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-aarch64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-ppc64le-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-s390x-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-x86_64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-aarch64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-ppc64le-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-s390x-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-x86_64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; python3-unbound-0:1.20.0-12.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); and 446 more
    After
    unbound as a component of Red Hat Enterprise Linux 6; unbound-devel as a component of Red Hat Enterprise Linux 6; unbound-libs as a component of Red Hat Enterprise Linux 6; unbound-python as a component of Red Hat Enterprise Linux 6; unbound.src as a component of Red Hat Enterprise Linux 6; unbound as a component of Red Hat Enterprise Linux 7; unbound-devel as a component of Red Hat Enterprise Linux 7; unbound-libs as a component of Red Hat Enterprise Linux 7; unbound-python as a component of Red Hat Enterprise Linux 7; unbound.src as a component of Red Hat Enterprise Linux 7; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4 · Fixed: rhcos-x86_64-412.86.202510291903-0 as a component of Red Hat OpenShift Container Platform 4.12; rhcos-x86_64-413.92.202510150118-0 as a component of Red Hat OpenShift Container Platform 4.13; rhcos-aarch64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-ppc64le-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-s390x-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-x86_64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-aarch64-416.94.202609011112-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-ppc64le-416.94.202609011112-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-s390x-416.94.202609011112-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-x86_64-416.94.202609011112-0 as a component of Red Hat OpenShift Container Platform 4.16; rhcos-aarch64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-ppc64le-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-s390x-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-x86_64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-aarch64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-ppc64le-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-s390x-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-x86_64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-aarch64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-ppc64le-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-s390x-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-x86_64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-aarch64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-ppc64le-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-s390x-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-x86_64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; python3-unbound-0:1.20.0-12.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); and 450 more
    Red Hat Product Security ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    unbound as a component of Red Hat Enterprise Linux 6; unbound-devel as a component of Red Hat Enterprise Linux 6; unbound-libs as a component of Red Hat Enterprise Linux 6; unbound-python as a component of Red Hat Enterprise Linux 6; unbound.src as a component of Red Hat Enterprise Linux 6; unbound as a component of Red Hat Enterprise Linux 7; unbound-devel as a component of Red Hat Enterprise Linux 7; unbound-libs as a component of Red Hat Enterprise Linux 7; unbound-python as a component of Red Hat Enterprise Linux 7; unbound.src as a component of Red Hat Enterprise Linux 7 · Fixed: rhcos-x86_64-412.86.202510291903-0 as a component of Red Hat OpenShift Container Platform 4.12; rhcos-x86_64-413.92.202510150118-0 as a component of Red Hat OpenShift Container Platform 4.13; rhcos-aarch64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-ppc64le-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-s390x-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-x86_64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-aarch64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-ppc64le-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-s390x-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-x86_64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-aarch64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-ppc64le-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-s390x-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-x86_64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-aarch64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-ppc64le-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-s390x-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-x86_64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-aarch64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-ppc64le-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-s390x-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-x86_64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; python3-unbound-0:1.20.0-12.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); and 446 more
    After
    unbound as a component of Red Hat Enterprise Linux 6; unbound-devel as a component of Red Hat Enterprise Linux 6; unbound-libs as a component of Red Hat Enterprise Linux 6; unbound-python as a component of Red Hat Enterprise Linux 6; unbound.src as a component of Red Hat Enterprise Linux 6; unbound as a component of Red Hat Enterprise Linux 7; unbound-devel as a component of Red Hat Enterprise Linux 7; unbound-libs as a component of Red Hat Enterprise Linux 7; unbound-python as a component of Red Hat Enterprise Linux 7; unbound.src as a component of Red Hat Enterprise Linux 7; openshift/ose-rhel-coreos-8 as a component of Red Hat OpenShift Container Platform 4 · Fixed: rhcos-x86_64-412.86.202510291903-0 as a component of Red Hat OpenShift Container Platform 4.12; rhcos-x86_64-413.92.202510150118-0 as a component of Red Hat OpenShift Container Platform 4.13; rhcos-aarch64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-ppc64le-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-s390x-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-x86_64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-aarch64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-ppc64le-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-s390x-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-x86_64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-aarch64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-ppc64le-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-s390x-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-x86_64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-aarch64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-ppc64le-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-s390x-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-x86_64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-aarch64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-ppc64le-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-s390x-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-x86_64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; python3-unbound-0:1.20.0-12.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); and 446 more
    Red Hat Product Security ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    unbound as a component of Red Hat Enterprise Linux 6; unbound-devel as a component of Red Hat Enterprise Linux 6; unbound-libs as a component of Red Hat Enterprise Linux 6; unbound-python as a component of Red Hat Enterprise Linux 6; unbound.src as a component of Red Hat Enterprise Linux 6; unbound as a component of Red Hat Enterprise Linux 7; unbound-devel as a component of Red Hat Enterprise Linux 7; unbound-libs as a component of Red Hat Enterprise Linux 7; unbound-python as a component of Red Hat Enterprise Linux 7; unbound.src as a component of Red Hat Enterprise Linux 7; rhcos as a component of Red Hat OpenShift Container Platform 4 · Fixed: rhcos-x86_64-412.86.202510291903-0 as a component of Red Hat OpenShift Container Platform 4.12; rhcos-x86_64-413.92.202510150118-0 as a component of Red Hat OpenShift Container Platform 4.13; rhcos-aarch64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-ppc64le-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-s390x-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-x86_64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-aarch64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-ppc64le-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-s390x-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-x86_64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-aarch64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-ppc64le-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-s390x-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-x86_64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-aarch64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-ppc64le-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-s390x-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-x86_64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-aarch64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-ppc64le-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-s390x-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-x86_64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; python3-unbound-0:1.20.0-12.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); and 446 more
    After
    unbound as a component of Red Hat Enterprise Linux 6; unbound-devel as a component of Red Hat Enterprise Linux 6; unbound-libs as a component of Red Hat Enterprise Linux 6; unbound-python as a component of Red Hat Enterprise Linux 6; unbound.src as a component of Red Hat Enterprise Linux 6; unbound as a component of Red Hat Enterprise Linux 7; unbound-devel as a component of Red Hat Enterprise Linux 7; unbound-libs as a component of Red Hat Enterprise Linux 7; unbound-python as a component of Red Hat Enterprise Linux 7; unbound.src as a component of Red Hat Enterprise Linux 7 · Fixed: rhcos-x86_64-412.86.202510291903-0 as a component of Red Hat OpenShift Container Platform 4.12; rhcos-x86_64-413.92.202510150118-0 as a component of Red Hat OpenShift Container Platform 4.13; rhcos-aarch64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-ppc64le-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-s390x-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-x86_64-414.92.202510211419-0 as a component of Red Hat OpenShift Container Platform 4.14; rhcos-aarch64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-ppc64le-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-s390x-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-x86_64-417.94.202510112152-0 as a component of Red Hat OpenShift Container Platform 4.17; rhcos-aarch64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-ppc64le-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-s390x-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-x86_64-418.94.202510230424-0 as a component of Red Hat OpenShift Container Platform 4.18; rhcos-aarch64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-ppc64le-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-s390x-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-x86_64-4.19.9.6.202510140714-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-aarch64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-ppc64le-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-s390x-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; rhcos-x86_64-4.20.9.6.202509251656-0 as a component of Red Hat OpenShift Container Platform 4.20; python3-unbound-0:1.20.0-12.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-0:1.20.0-12.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); python3-unbound-debuginfo-0:1.20.0-12.el10_0.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); and 446 more
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2025-21730↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2025-5994 · cve.blacktree.nl