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Full vulnerability report · 2026
CVE-2026-41079High confidence

OpenPrinting CUPS: Heap out-of-bounds read in SNMP supply-level polling leaks stack memory to authenticated users

OpenPrinting · cups

Official source article: GitHub GHSA-6WPW-G8G6-WVRV ↗. Check the applicable product and release in the original source.

4.3MediumCVSS 3.1
Recommended action
Patch only the product branches with a verified fix

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 43 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
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.
  • A structured source references public exploit or proof-of-concept material.
  • EPSS is 0.27% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs OpenPrinting cups 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.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 43 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Distribution package intelligence

Release-specific package status

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

5 package states
Package result overrides the generic status

BlackTree has verified remediation for at least one product or source, but the relevant distribution still reports no fixed package for 2 affected package states shown here. Treat those rows as affected with no fix until that distribution publishes a fixed version.

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
Debian trixietrixie · sourcecupsAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourcecupsAffected, no fix publishedDebian currently tracks this release as open.Not published in this feedDebian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcecupsVendor fix publishedDebian records a fixed source-package version for this release.2.4.17-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcecupsVendor fix publishedDebian records a fixed source-package version for this release.2.4.17-1Debian Security Tracker ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivecupsVendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.2.4.7-1.2ubuntu7.13Canonical Ubuntu Security ↗Source updated 6 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-2026-41079 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitycups: CUPS: Information disclosure via crafted SNMP response
41 known affected

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

  • cups as a component of Red Hat Enterprise Linux 10
  • cups-client as a component of Red Hat Enterprise Linux 10
  • cups-devel as a component of Red Hat Enterprise Linux 10
  • cups-filesystem as a component of Red Hat Enterprise Linux 10
  • cups-ipptool as a component of Red Hat Enterprise Linux 10
  • cups-libs as a component of Red Hat Enterprise Linux 10
  • cups-lpd as a component of Red Hat Enterprise Linux 10
  • cups-printerapp as a component of Red Hat Enterprise Linux 10
  • cups.src as a component of Red Hat Enterprise Linux 10
  • cups as a component of Red Hat Enterprise Linux 6
  • cups-devel as a component of Red Hat Enterprise Linux 6
  • cups-libs as a component of Red Hat Enterprise Linux 6
Summary
A flaw was found in CUPS. A network-adjacent attacker can send a specially crafted Simple Network Management Protocol (SNMP) response to the CUPS SNMP backend, leading to an out-of-bounds read. This vulnerability allows for the disclosure of up to 176 bytes of sensitive memory, which is then converted and stored as printer supply description strings. Authenticated users can subsequently view this leaked information through IPP Get-Printer-Attributes responses and the CUPS web interface.
Remediation
Fix deferred
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-2026-25574

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 actionPatch only the product branches with a verified fix

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 43 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.17, a network-adjacent attacker can send a crafted SNMP response to the CUPS SNMP backend that causes an out-of-bounds read of up to 176 bytes past a stack buffer. The leaked memory is converted from UTF-16 to UTF-8 and stored as printer supply description strings, which are subsequently visible to authenticated users via IPP Get-Printer-Attributes responses and the CUPS web interface. This vulnerability is fixed in 2.4.17.

What

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.17, a network-adjacent attacker can send a crafted SNMP response to the CUPS SNMP backend that causes an out-of-bounds read of up to 176 bytes past a stack buffer. The leaked memory is converted from UTF-16 to UTF-8 and stored as printer supply description strings, which are subsequently visible to authenticated users via IPP Get-Printer-Attributes responses and the CUPS web interface. This vulnerability is fixed in 2.4.17.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through an adjacent network 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

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.17, a network-adjacent attacker can send a crafted SNMP response to the CUPS SNMP backend that causes an out-of-bounds read of up to 176 bytes past a stack buffer. The leaked memory is converted from UTF-16 to UTF-8 and stored as printer supply description strings, which are subsequently visible to authenticated users via IPP Get-Printer-Attributes responses and the CUPS web interface. This vulnerability is fixed in 2.4.17.

Why

The product reads data past the end, or before the beginning, of the intended buffer.

How

An attacker operating through an adjacent network 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.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
an adjacent network → Out-of-bounds Read → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Adjacent
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-125 ↗

CWE-125: Out-of-bounds Read. The product reads data past the end, or before the beginning, of the intended buffer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:A/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.

AVAdjacentAttack vector: The attacker must be on an adjacent or logically close 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.
UnauthenticatedCWE-125Public exploit reference
A

Official authority intelligence

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

BSI · German · WID-SEC-2026-1274CUPS: Schwachstelle ermöglicht Offenlegung von Informationen

Ein Angreifer aus einem angrenzenden Netzwerk kann eine Schwachstelle in CUPS ausnutzen, um Informationen offenzulegen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260429Security Bulletin 29 Apr 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 29 Apr 2026, published on 29 April 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0519Multiples vulnérabilités dans Microsoft Azure Linux

sécurité Microsoft CVE-2026-31608 du 26 avril 2026 Bulletin de sécurité Microsoft CVE-2026-31609 du 26 avril 2026 Bulletin de sécurité Microsoft CVE-2026-31620 du 26 avril 2026 Bulletin de sécurité Microsoft CVE-2026-31621 du 26 avril 2026 Bulletin de sécurité Microsoft CVE-2026-31674 du 26 avril 2026 Bulletin de sécurité Microsoft CVE-2026-31675 du 26 avril 2026 Bulletin de sécurité Microsoft CVE-2026-31678 du 26 avril 2026 Bulletin de sécurité Microsoft CVE-2026-31679 du 26 avril 2026 Bulletin de sécurité Microsoft CVE-2026-31680 du 26 avril 2026 Bulletin de sécurité Microsoft CVE-2026-31682 du 26 avril 2026 Bulletin de sécurité Microsoft CVE-2026-41079 du 26 avril 2026 Bulletin de sécurité Microsoft CVE-2026-31563 du 29 avril 2026 Une gestion de version détaillée se trouve à la fin de ce document. Risque Non spécifié par l'éditeur Systèmes affectés azl3 cups 2.4.16-1 versions antérieures à 2.4.18-1 azl3 kernel 6.6.130.1-3 versions antérieures à 6.6.134.1-2 azl3 libgcrypt 1.10.3-1 versions antérieures à 1.10.3-2 azl3 ruby 3.3.5-7 versions antérieures à 3.3.5-8 Résumé De multiples vulnérabilités ont été découvertes dans Microsoft Azure Linux. Elles permettent à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur. Solutions Se référer au bulletin de sécurité de l'édit

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-013015OpenPrintingのCUPSにおける複数の脆弱性

OpenPrinting CUPSは、Linuxおよびその他のUnix系オペレーティングシステム向けのオープンソースの印刷システムです。2.4.17以前のバージョンでは、ネットワーク上の近接した攻撃者が細工されたSNMP応答をCUPSのSNMPバックエンドに送信することで、スタックバッファを最大176バイト越えて範囲外の読み取りが発生する可能性があります。漏洩したメモリはUTF-16からUTF-8に変換され、プリンタの消耗品説明文字列として保存されます。その後、認証済みユーザーはIPPのGet-Printer-Attributes応答やCUPSのウェブインターフェースを通じてこれを確認できます。この脆弱性は2.4.17で修正されました。

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.
Fix availability varies by product
Affected
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
A mitigation or workaround reference is available from the source linked below; validate it against the affected product and version.
04

Evidence and provenance

Published 24 Apr 2026 · Last source change 25 Apr 2026, 01:47 UTC · CWE-125 · Out-of-bounds Read

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-2026-25574
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD enriched

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
    cups as a component of Red Hat Enterprise Linux 10; cups-client as a component of Red Hat Enterprise Linux 10; cups-devel as a component of Red Hat Enterprise Linux 10; cups-filesystem as a component of Red Hat Enterprise Linux 10; cups-ipptool as a component of Red Hat Enterprise Linux 10; cups-libs as a component of Red Hat Enterprise Linux 10; cups-lpd as a component of Red Hat Enterprise Linux 10; cups-printerapp as a component of Red Hat Enterprise Linux 10; cups.src as a component of Red Hat Enterprise Linux 10; cups as a component of Red Hat Enterprise Linux 6; cups-devel as a component of Red Hat Enterprise Linux 6; cups-libs as a component of Red Hat Enterprise Linux 6; cups-lpd as a component of Red Hat Enterprise Linux 6; cups-php as a component of Red Hat Enterprise Linux 6; cups.src as a component of Red Hat Enterprise Linux 6; cups as a component of Red Hat Enterprise Linux 7; cups-client as a component of Red Hat Enterprise Linux 7; cups-devel as a component of Red Hat Enterprise Linux 7; cups-filesystem as a component of Red Hat Enterprise Linux 7; cups-ipptool as a component of Red Hat Enterprise Linux 7; cups-libs as a component of Red Hat Enterprise Linux 7; cups-lpd as a component of Red Hat Enterprise Linux 7; cups.src as a component of Red Hat Enterprise Linux 7; cups as a component of Red Hat Enterprise Linux 8; cups-client as a component of Red Hat Enterprise Linux 8; cups-devel as a component of Red Hat Enterprise Linux 8; cups-filesystem as a component of Red Hat Enterprise Linux 8; cups-ipptool as a component of Red Hat Enterprise Linux 8; cups-libs as a component of Red Hat Enterprise Linux 8; cups-lpd as a component of Red Hat Enterprise Linux 8; and 10 more
    After
    cups as a component of Red Hat Enterprise Linux 10; cups-client as a component of Red Hat Enterprise Linux 10; cups-devel as a component of Red Hat Enterprise Linux 10; cups-filesystem as a component of Red Hat Enterprise Linux 10; cups-ipptool as a component of Red Hat Enterprise Linux 10; cups-libs as a component of Red Hat Enterprise Linux 10; cups-lpd as a component of Red Hat Enterprise Linux 10; cups-printerapp as a component of Red Hat Enterprise Linux 10; cups.src as a component of Red Hat Enterprise Linux 10; cups as a component of Red Hat Enterprise Linux 6; cups-devel as a component of Red Hat Enterprise Linux 6; cups-libs as a component of Red Hat Enterprise Linux 6; cups-lpd as a component of Red Hat Enterprise Linux 6; cups-php as a component of Red Hat Enterprise Linux 6; cups.src as a component of Red Hat Enterprise Linux 6; cups as a component of Red Hat Enterprise Linux 7; cups-client as a component of Red Hat Enterprise Linux 7; cups-devel as a component of Red Hat Enterprise Linux 7; cups-filesystem as a component of Red Hat Enterprise Linux 7; cups-ipptool as a component of Red Hat Enterprise Linux 7; cups-libs as a component of Red Hat Enterprise Linux 7; cups-lpd as a component of Red Hat Enterprise Linux 7; cups.src as a component of Red Hat Enterprise Linux 7; cups as a component of Red Hat Enterprise Linux 8; cups-client as a component of Red Hat Enterprise Linux 8; cups-devel as a component of Red Hat Enterprise Linux 8; cups-filesystem as a component of Red Hat Enterprise Linux 8; cups-ipptool as a component of Red Hat Enterprise Linux 8; cups-libs as a component of Red Hat Enterprise Linux 8; cups-lpd as a component of Red Hat Enterprise Linux 8; and 11 more
    Red Hat Product Security ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    cups as a component of Red Hat Enterprise Linux 10; cups-client as a component of Red Hat Enterprise Linux 10; cups-devel as a component of Red Hat Enterprise Linux 10; cups-filesystem as a component of Red Hat Enterprise Linux 10; cups-ipptool as a component of Red Hat Enterprise Linux 10; cups-libs as a component of Red Hat Enterprise Linux 10; cups-lpd as a component of Red Hat Enterprise Linux 10; cups-printerapp as a component of Red Hat Enterprise Linux 10; cups.src as a component of Red Hat Enterprise Linux 10; cups as a component of Red Hat Enterprise Linux 6; cups-devel as a component of Red Hat Enterprise Linux 6; cups-libs as a component of Red Hat Enterprise Linux 6; cups-lpd as a component of Red Hat Enterprise Linux 6; cups-php as a component of Red Hat Enterprise Linux 6; cups.src as a component of Red Hat Enterprise Linux 6; cups as a component of Red Hat Enterprise Linux 7; cups-client as a component of Red Hat Enterprise Linux 7; cups-devel as a component of Red Hat Enterprise Linux 7; cups-filesystem as a component of Red Hat Enterprise Linux 7; cups-ipptool as a component of Red Hat Enterprise Linux 7; cups-libs as a component of Red Hat Enterprise Linux 7; cups-lpd as a component of Red Hat Enterprise Linux 7; cups.src as a component of Red Hat Enterprise Linux 7; cups as a component of Red Hat Enterprise Linux 8; cups-client as a component of Red Hat Enterprise Linux 8; cups-devel as a component of Red Hat Enterprise Linux 8; cups-filesystem as a component of Red Hat Enterprise Linux 8; cups-ipptool as a component of Red Hat Enterprise Linux 8; cups-libs as a component of Red Hat Enterprise Linux 8; cups-lpd as a component of Red Hat Enterprise Linux 8; and 11 more
    After
    cups as a component of Red Hat Enterprise Linux 10; cups-client as a component of Red Hat Enterprise Linux 10; cups-devel as a component of Red Hat Enterprise Linux 10; cups-filesystem as a component of Red Hat Enterprise Linux 10; cups-ipptool as a component of Red Hat Enterprise Linux 10; cups-libs as a component of Red Hat Enterprise Linux 10; cups-lpd as a component of Red Hat Enterprise Linux 10; cups-printerapp as a component of Red Hat Enterprise Linux 10; cups.src as a component of Red Hat Enterprise Linux 10; cups as a component of Red Hat Enterprise Linux 6; cups-devel as a component of Red Hat Enterprise Linux 6; cups-libs as a component of Red Hat Enterprise Linux 6; cups-lpd as a component of Red Hat Enterprise Linux 6; cups-php as a component of Red Hat Enterprise Linux 6; cups.src as a component of Red Hat Enterprise Linux 6; cups as a component of Red Hat Enterprise Linux 7; cups-client as a component of Red Hat Enterprise Linux 7; cups-devel as a component of Red Hat Enterprise Linux 7; cups-filesystem as a component of Red Hat Enterprise Linux 7; cups-ipptool as a component of Red Hat Enterprise Linux 7; cups-libs as a component of Red Hat Enterprise Linux 7; cups-lpd as a component of Red Hat Enterprise Linux 7; cups.src as a component of Red Hat Enterprise Linux 7; cups as a component of Red Hat Enterprise Linux 8; cups-client as a component of Red Hat Enterprise Linux 8; cups-devel as a component of Red Hat Enterprise Linux 8; cups-filesystem as a component of Red Hat Enterprise Linux 8; cups-ipptool as a component of Red Hat Enterprise Linux 8; cups-libs as a component of Red Hat Enterprise Linux 8; cups-lpd as a component of Red Hat Enterprise Linux 8; and 10 more
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-25574↗Vendor CSAF · Red Hat Product Security↗CISA Vulnrichment SSVC evidence↗Public exploit reference · GitHub GHSA-6WPW-G8G6-WVRV↗Patch or update reference↗Patch or update 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-2026-41079 · cve.blacktree.nl