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Full vulnerability report · 2026
CVE-2026-41054High confidence

Missing exit out of permission check in haveged could lead to root exploit

SUSE · Container suse/sle-micro-rancher/5.3:latest

7.8HighCVSS 3.1
Recommended action
Within 7 days

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

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Medium, lowered one band.downgradedsince 5 Jun 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.18% for the current model date.

Compensating controls

  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs SUSE Container suse/sle-micro-rancher/5.3:latest and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  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.

8 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 · mainhavegedVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.9.21-r0Alpine Security Database ↗Source updated 6 Oct 2026
Alpine v3.22v3.22 · mainhavegedVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.9.21-r0Alpine Security Database ↗Source updated 6 Oct 2026
Alpine v3.21v3.21 · mainhavegedVendor fix publishedAlpine records a security fix at this version. An absent entry does not mean the package is unaffected.1.9.21-r0Alpine Security Database ↗Source updated 6 Oct 2026
Debian trixietrixie · sourcehavegedVendor fix publishedDebian records a fixed source-package version for this release.1.9.19-12+deb13u1Debian Security Tracker ↗Source updated 7 Oct 2026
Debian bookwormbookworm · sourcehavegedVendor fix publishedDebian records a fixed source-package version for this release.1.9.14-1+deb12u1Debian Security Tracker ↗Source updated 7 Oct 2026
Debian forkyforky · sourcehavegedVendor fix publishedDebian records a fixed source-package version for this release.1.9.21-1Debian Security Tracker ↗Source updated 7 Oct 2026
Debian sidsid · sourcehavegedVendor fix publishedDebian records a fixed source-package version for this release.1.9.21-1Debian Security Tracker ↗Source updated 7 Oct 2026
Ubuntu 24.04 LTSnoble · esm-appshavegedVendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.1.9.14-1ubuntu2+esm1~24.04.1Canonical Ubuntu Security ↗Source updated 6 Oct 2026
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-2026-31076

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.

Fix not verified
01

What, why and how

In `src/havegecmd.c`, the `socket_handler` function performs a credential check on the abstract UNIX socket (`\0/sys/entropy/haveged`). However, while it detects if the connecting user is not root (`cred.uid != 0`) and prepares a negative acknowledgement (`ASCII_NAK`), it **fails to stop execution**. The code proceeds to the `switch` statement, allowing any local unprivileged user to execute privileged commands such as `MAGIC_CHROOT`.

What

In `src/havegecmd.c`, the `socket_handler` function performs a credential check on the abstract UNIX socket (`\0/sys/entropy/haveged`). However, while it detects if the connecting user is not root (`cred.uid != 0`) and prepares a negative acknowledgement (`ASCII_NAK`), it **fails to stop execution**. The code proceeds to the `switch` statement, allowing any local unprivileged user to execute privileged commands such as `MAGIC_CHROOT`.

Why

The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

In `src/havegecmd.c`, the `socket_handler` function performs a credential check on the abstract UNIX socket (`\0/sys/entropy/haveged`). However, while it detects if the connecting user is not root (`cred.uid != 0`) and prepares a negative acknowledgement (`ASCII_NAK`), it **fails to stop execution**. The code proceeds to the `switch` statement, allowing any local unprivileged user to execute privileged commands such as `MAGIC_CHROOT`.

Why

The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.

How

An attacker operating through local access may attempt exploitation with low privileges. 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
local access → Authentication Bypass by Primary Weakness → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
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-305 ↗

CWE-305: Authentication Bypass by Primary Weakness. The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.

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

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
Stolen credentials, tokens and legitimate administration functions may provide continued access without deploying a large custom toolset.
CWE-305
A

Official authority intelligence

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

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 not verified
Affected
  • Container suse/sle-micro-rancher/5.3:latest: ? < 1.9.14-150400.3.11.1
  • Container suse/sle-micro-rancher/5.4:latest: ? < 1.9.14-150400.3.11.1
  • Container suse/sle-micro/5.5:latest: ? < 1.9.14-150400.3.11.1
  • Image SLES15-SP4-SAP-BYOS: ? < 1.9.14-150400.3.11.1
  • Image SLES15-SP4-SAP-BYOS-Azure: ? < 1.9.14-150400.3.11.1
  • Image SLES15-SP4-SAP-BYOS-EC2: ? < 1.9.14-150400.3.11.1
  • Image SLES15-SP4-SAP-BYOS-GCE: ? < 1.9.14-150400.3.11.1
  • Image SLES15-SP4-SAP-Hardened: ? < 1.9.14-150400.3.11.1
  • Image SLES15-SP4-SAP-Hardened-BYOS: ? < 1.9.14-150400.3.11.1
  • Image SLES15-SP4-SAP-Hardened-BYOS-Azure: ? < 1.9.14-150400.3.11.1
  • Image SLES15-SP4-SAP-Hardened-BYOS-EC2: ? < 1.9.14-150400.3.11.1
  • Image SLES15-SP4-SAP-Hardened-BYOS-GCE: ? < 1.9.14-150400.3.11.1
  • Image SLES15-SP4-SAP-Hardened-GCE: ? < 1.9.14-150400.3.11.1
  • SUSE Linux Enterprise Desktop 15 SP7: ? < 1.9.14-150600.11.6.1
  • SUSE Linux Enterprise High Performance Computing 15 SP7: ? < 1.9.14-150600.11.6.1
  • SUSE Linux Enterprise Module for Basesystem 15 SP7: ? < 1.9.14-150600.11.6.1
  • SUSE Linux Enterprise Server 15 SP7: ? < 1.9.14-150600.11.6.1
  • SUSE Linux Enterprise Server for SAP Applications 15 SP7: ? < 1.9.14-150600.11.6.1
  • SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS: ? < 1.9.14-150400.3.11.1
  • SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS: ? < 1.9.14-150400.3.11.1
  • SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS: ? < 1.9.14-150400.3.11.1
  • SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS: ? < 1.9.14-150400.3.11.1
  • SUSE Linux Enterprise Micro 5.3: ? < 1.9.14-150400.3.11.1
  • SUSE Linux Enterprise Micro 5.4: ? < 1.9.14-150400.3.11.1
  • SUSE Linux Enterprise Micro 5.5: ? < 1.9.14-150400.3.11.1
  • SUSE Linux Enterprise Server 15 SP4-LTSS: ? < 1.9.14-150400.3.11.1
  • SUSE Linux Enterprise Server 15 SP5-LTSS: ? < 1.9.14-150400.3.11.1
  • SUSE Linux Enterprise Server 15 SP6-LTSS: ? < 1.9.14-150600.11.6.1
  • SUSE Linux Enterprise Server for SAP Applications 15 SP4: ? < 1.9.14-150400.3.11.1
  • SUSE Linux Enterprise Server for SAP Applications 15 SP5: ? < 1.9.14-150400.3.11.1
  • SUSE Linux Enterprise Server for SAP Applications 15 SP6: ? < 1.9.14-150600.11.6.1
  • SUSE Manager Proxy LTS 4.3: ? < 1.9.14-150400.3.11.1
  • SUSE Manager Retail Branch Server LTS 4.3: ? < 1.9.14-150400.3.11.1
  • SUSE Manager Server LTS 4.3: ? < 1.9.14-150400.3.11.1
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 20 May 2026 · Last source change 5 Jun 2026, 11:06 UTC · CWE-305 · Authentication Bypass by Primary Weakness

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-2026-31076
Product sourceCNA
Remediation sourceCVE/CNA references
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 ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2026-31076↗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-2026-41054 · cve.blacktree.nl