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Full vulnerability report · 2026
CVE-2026-4893High confidence

CVE-2026-4893

dnsmasq · dnsmasq

5.3MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 0.58% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs dnsmasq dnsmasq and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Alpine, Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

7 package states
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.

Distribution releaseSource packageVendor stateFixed versionEvidence
Alpine v3.23v3.23 · maindnsmasqVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.2.91-r1Alpine Security Database ↗Source updated 3 Oct 2026
Alpine v3.22v3.22 · maindnsmasqVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.2.91-r1Alpine Security Database ↗Source updated 3 Oct 2026
Debian trixietrixie · sourcednsmasqVendor fix publishedDebian records a fixed source-package version for this release.2.91-1+deb13u1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourcednsmasqVendor fix publishedDebian records a fixed source-package version for this release.2.90-4~deb12u2Debian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcednsmasqVendor fix publishedDebian records a fixed source-package version for this release.2.92-5Debian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcednsmasqVendor fix publishedDebian records a fixed source-package version for this release.2.92-5Debian Security Tracker ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivednsmasqVendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.2.90-2ubuntu0.3Canonical Ubuntu Security ↗Source updated 5 Oct 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-2026-4893 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitydnsmasq: Broken ECS source validation bypass
7 known affected

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

  • dnsmasq as a component of Red Hat Enterprise Linux 6
  • dnsmasq-utils as a component of Red Hat Enterprise Linux 6
  • dnsmasq.src as a component of Red Hat Enterprise Linux 6
  • dnsmasq as a component of Red Hat Enterprise Linux 7
  • dnsmasq-utils as a component of Red Hat Enterprise Linux 7
  • dnsmasq.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 validation bypass was discovered in dnsmasq's RFC 7871 client subnet (ECS) handling. When verifying ECS source information in DNS responses, dnsmasq passes the OPT record length instead of the full packet length to the validation function.This causes all internal bounds checks to fail, completely bypassing ECS source validation and allowing an attacker to spoof client subnet information.
Remediation
For OpenShift Container Platform 4.19 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/4.19/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 values for the release are as follows: (For x86_64 architecture) The image digest is sha256:8367df5ccbec71bfd55d827da81c659e301e17073b8a1a47e43d3e201adb4fd1 (For s390x architecture) The image digest is sha256:8eb5fa80e5e92443a0870c876e82b03971051c4285d9f71ef025eea098448dff (For ppc64le architecture) The image digest is sha256:5d7790ac52e357afe0a15363f4eefd505029cc49a3fc147787cc5b96d8bbc666 (For aarch64 architecture) The image digest is sha256:ed4761bb6a0bb26e5250aa36776dbe48d9ccab7fb1a05a253aa6ef2d59d32fde All OpenShift Container Platform 4.19 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/4.19/html-single/updating_clusters/index#updating-cluster-cli.
Optional official sources

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

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

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-2026-29155

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 actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.

What

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.

Why

The affected component does not establish the requesting party's identity reliably before granting access.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.

What

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information.

Why

The affected component does not establish the requesting party's identity reliably before granting access.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may obtain information outside the intended access boundary.

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 → Improper Authentication → obtain information outside the intended access boundary
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-287 ↗

CWE-287: Improper Authentication. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Common Vulnerability Scoring System 3.1: 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.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CLowConfidentiality impact: A successful attack can cause a limited loss.INoneIntegrity impact: No direct loss is represented by this metric.ANoneAvailability impact: 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-287
A

Official authority intelligence

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

BSI · German · WID-SEC-2026-1468dnsmasq: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in dnsmasq ausnutzen, um einen Denial-of-Service-Zustand zu verursachen, beliebigen Code mit Root-Rechten auszuführen, vertrauliche Informationen offenzulegen, Daten zu manipulieren und Benutzer auf bösartige Domains umzuleiten

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0986Multiples vulnérabilités dans les produits IBM

ERecord?id=CVE-2026-47021 Référence CVE CVE-2026-47027 https://www.cve.org/CVERecord?id=CVE-2026-47027 Référence CVE CVE-2026-47057 https://www.cve.org/CVERecord?id=CVE-2026-47057 Référence CVE CVE-2026-47058 https://www.cve.org/CVERecord?id=CVE-2026-47058 Référence CVE CVE-2026-47059 https://www.cve.org/CVERecord?id=CVE-2026-47059 Référence CVE CVE-2026-47063 https://www.cve.org/CVERecord?id=CVE-2026-47063 Référence CVE CVE-2026-4890 https://www.cve.org/CVERecord?id=CVE-2026-4890 Référence CVE CVE-2026-4891 https://www.cve.org/CVERecord?id=CVE-2026-4891 Référence CVE CVE-2026-4892 https://www.cve.org/CVERecord?id=CVE-2026-4892 Référence CVE CVE-2026-4893 https://www.cve.org/CVERecord?id=CVE-2026-4893 Référence CVE CVE-2026-48962 https://www.cve.org/CVERecord?id=CVE-2026-48962 Référence CVE CVE-2026-48978 https://www.cve.org/CVERecord?id=CVE-2026-48978 Référence CVE CVE-2026-49268 https://www.cve.org/CVERecord?id=CVE-2026-49268 Référence CVE CVE-2026-49432 https://www.cve.org/CVERecord?id=CVE-2026-49432 Référence CVE CVE-2026-49434 https://www.cve.org/CVERecord?id=CVE-2026-49434 Référence CVE CVE-2026-50151 https://www.cve.org/CVERecord?id=CVE-2026-50151 Référence CVE CVE-2026-50162 https://www.cve.org/CVERecord?id=CVE-2026-50162 Référence CVE CVE-2026-50163 https://www.cve.org/CVERecord?id=C

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-016979dnsmasqにおける複数の脆弱性

dnsmasqには以下の複数の脆弱性が存在します。 extract_name()においてヒープベースのバッファオーバーフローが発生する（CVE-2026-2291） DNSSECの検証処理時に無限ループが発生する（CVE-2026-4890） DNSSECの検証処理時にヒープメモリの境界外読み取りが発生する（CVE-2026-4891） DHCPv6の処理時にヒープメモリの境界外書き込みが発生する（CVE-2026-4892） RFC7871のクライアントサブネット情報を含む、細工されたDNSパケットを処理する際、パケットの送信元検証がバイパスされる（CVE-2026-4893） extract_addresses()においてヒープメモリの境界外読み取りが発生する（CVE-2026-5172）

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
Fixed
Action
For OpenShift Container Platform 4.19 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/4.19/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 values for the release are as follows: (For x86_64 architecture) The image digest is sha256:8367df5ccbec71bfd55d827da81c659e301e17073b8a1a47e43d3e201adb4fd1 (For s390x architecture) The image digest is sha256:8eb5fa80e5e92443a0870c876e82b03971051c4285d9f71ef025eea098448dff (For ppc64le architecture) The image digest is sha256:5d7790ac52e357afe0a15363f4eefd505029cc49a3fc147787cc5b96d8bbc666 (For aarch64 architecture) The image digest is sha256:ed4761bb6a0bb26e5250aa36776dbe48d9ccab7fb1a05a253aa6ef2d59d32fde All OpenShift Container Platform 4.19 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/4.19/html-single/updating_clusters/index#updating-cluster-cli.
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 11 May 2026 · Last source change 20 May 2026, 14:09 UTC · CWE-287 · Improper Authentication

CVE recordCVE.org · 5.2
CVSS sourceCISA ADP
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-2026-29155
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD awaiting enrichment

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
    < 2.92rel2 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    < 2.92rel2 · Fixed: For OpenShift Container Platform 4.19 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/4.19/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 values for the release are as follows: (For x86_64 architecture) The image digest is sha256:8367df5ccbec71bfd55d827da81c659e301e17073b8a1a47e43d3e201adb4fd1 (For s390x architecture) The image digest is sha256:8eb5fa80e5e92443a0870c876e82b03971051c4285d9f71ef025eea098448dff (For ppc64le architecture) The image digest is sha256:5d7790ac52e357afe0a15363f4eefd505029cc49a3fc147787cc5b96d8bbc666 (For aarch64 architecture) The image digest is sha256:ed4761bb6a0bb26e5250aa36776dbe48d9ccab7fb1a05a253aa6ef2d59d32fde All OpenShift Container Platform 4.19 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/4.19/html-single/updating_clusters/index#updating-cluster-cli.
    Red Hat Product Security ↗
  2. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    Red Hat Product Security ↗
  3. Affected versionsThe structured affected or fixed version information changed.
    Before
    dnsmasq as a component of Red Hat Enterprise Linux 6; dnsmasq-utils as a component of Red Hat Enterprise Linux 6; dnsmasq.src as a component of Red Hat Enterprise Linux 6; dnsmasq as a component of Red Hat Enterprise Linux 7; dnsmasq-utils as a component of Red Hat Enterprise Linux 7; dnsmasq.src as a component of Red Hat Enterprise Linux 7 · Fixed: rhcos-aarch64-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-ppc64le-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-s390x-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-x86_64-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; dnsmasq-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.src as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.79-36.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.src as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8); and 58 more
    After
    dnsmasq as a component of Red Hat Enterprise Linux 6; dnsmasq-utils as a component of Red Hat Enterprise Linux 6; dnsmasq.src as a component of Red Hat Enterprise Linux 6; dnsmasq as a component of Red Hat Enterprise Linux 7; dnsmasq-utils as a component of Red Hat Enterprise Linux 7; dnsmasq.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-aarch64-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-ppc64le-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-s390x-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-x86_64-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; dnsmasq-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.src as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.79-36.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.src as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8); and 58 more
    Red Hat Product Security ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    dnsmasq as a component of Red Hat Enterprise Linux 6; dnsmasq-utils as a component of Red Hat Enterprise Linux 6; dnsmasq.src as a component of Red Hat Enterprise Linux 6; dnsmasq as a component of Red Hat Enterprise Linux 7; dnsmasq-utils as a component of Red Hat Enterprise Linux 7; dnsmasq.src as a component of Red Hat Enterprise Linux 7; openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · Fixed: rhcos-aarch64-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-ppc64le-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-s390x-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-x86_64-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; dnsmasq-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.src as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.79-36.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.src as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8); and 58 more
    After
    dnsmasq as a component of Red Hat Enterprise Linux 6; dnsmasq-utils as a component of Red Hat Enterprise Linux 6; dnsmasq.src as a component of Red Hat Enterprise Linux 6; dnsmasq as a component of Red Hat Enterprise Linux 7; dnsmasq-utils as a component of Red Hat Enterprise Linux 7; dnsmasq.src as a component of Red Hat Enterprise Linux 7 · Fixed: rhcos-aarch64-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-ppc64le-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-s390x-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; rhcos-x86_64-4.19.9.6.202607151909-0 as a component of Red Hat OpenShift Container Platform 4.19; dnsmasq-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.src as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debuginfo-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-debugsource-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-utils-debuginfo-0:2.90-7.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); dnsmasq-0:2.79-36.el8_10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.src as a component of Red Hat Enterprise Linux AppStream (v. 8); dnsmasq-0:2.79-36.el8_10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 8); and 58 more
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release recorded from official guidance
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2026-29155↗Red Hat Product Security security advisory↗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-2026-4893 · cve.blacktree.nl