Missing exit out of permission check in haveged could lead to root exploit (CVE-2026-41054)
Published Sources: Msrc Update Guide, CVE.org, Debian LTS, Ubuntu, EUVD, Debian
What is affected, what to do
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**.
Update SUSE Container suse/sle-micro-rancher/5.3:latest to version 1.9.14-150400.3.11.1, SUSE Container suse/sle-micro-rancher/5.4:latest to version 1.9.14-150400.3.11.1, SUSE Container suse/sle-micro/5.5:latest to version 1.9.14-150400.3.11.1.
- Affected
- SUSE Container suse/sle-micro-rancher/5.3:latest
lt ?..1.9.14-150400.3.11.1 - SUSE Container suse/sle-micro-rancher/5.4:latest
lt ?..1.9.14-150400.3.11.1 - SUSE Container suse/sle-micro/5.5:latest
lt ?..1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-BYOS
lt ?..1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-BYOS-Azure
lt ?..1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-BYOS-EC2
lt ?..1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-BYOS-GCE
lt ?..1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-Hardened
lt ?..1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-Hardened-BYOS
lt ?..1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-Hardened-BYOS-Azure
lt ?..1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-Hardened-BYOS-EC2
lt ?..1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-Hardened-BYOS-GCE
lt ?..1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-Hardened-GCE
lt ?..1.9.14-150400.3.11.1 - SUSE Linux Enterprise Desktop 15 SP7
lt ?..1.9.14-150600.11.6.1 - SUSE Linux Enterprise High Performance Computing 15 SP7
lt ?..1.9.14-150600.11.6.1 - SUSE Linux Enterprise Module for Basesystem 15 SP7
lt ?..1.9.14-150600.11.6.1 - SUSE Linux Enterprise Server 15 SP7
lt ?..1.9.14-150600.11.6.1 - SUSE Linux Enterprise Server for SAP Applications 15 SP7
lt ?..1.9.14-150600.11.6.1 - SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS
lt ?..1.9.14-150400.3.11.1 - SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
lt ?..1.9.14-150400.3.11.1 - SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
lt ?..1.9.14-150400.3.11.1 - SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
lt ?..1.9.14-150400.3.11.1 - SUSE Linux Enterprise Micro 5.3
lt ?..1.9.14-150400.3.11.1 - SUSE Linux Enterprise Micro 5.4
lt ?..1.9.14-150400.3.11.1 - SUSE Linux Enterprise Micro 5.5
lt ?..1.9.14-150400.3.11.1 - SUSE Linux Enterprise Server 15 SP4-LTSS
lt ?..1.9.14-150400.3.11.1 - SUSE Linux Enterprise Server 15 SP5-LTSS
lt ?..1.9.14-150400.3.11.1 - SUSE Linux Enterprise Server 15 SP6-LTSS
lt ?..1.9.14-150600.11.6.1 - SUSE Linux Enterprise Server for SAP Applications 15 SP4
lt ?..1.9.14-150400.3.11.1 - SUSE Linux Enterprise Server for SAP Applications 15 SP5
lt ?..1.9.14-150400.3.11.1 - SUSE Linux Enterprise Server for SAP Applications 15 SP6
lt ?..1.9.14-150600.11.6.1 - SUSE Manager Proxy LTS 4.3
lt ?..1.9.14-150400.3.11.1 - SUSE Manager Retail Branch Server LTS 4.3
lt ?..1.9.14-150400.3.11.1 - SUSE Manager Server LTS 4.3
lt ?..1.9.14-150400.3.11.1
- SUSE Container suse/sle-micro-rancher/5.3:latest
- Fixed in
- SUSE Container suse/sle-micro-rancher/5.3:latest
1.9.14-150400.3.11.1 - SUSE Container suse/sle-micro-rancher/5.4:latest
1.9.14-150400.3.11.1 - SUSE Container suse/sle-micro/5.5:latest
1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-BYOS
1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-BYOS-Azure
1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-BYOS-EC2
1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-BYOS-GCE
1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-Hardened
1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-Hardened-BYOS
1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-Hardened-BYOS-Azure
1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-Hardened-BYOS-EC2
1.9.14-150400.3.11.1 - SUSE Image SLES15-SP4-SAP-Hardened-BYOS-GCE
1.9.14-150400.3.11.1 - SUSE 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
- SUSE Container suse/sle-micro-rancher/5.3:latest
Not sure whether and how you are affected? Ask a question about this vulnerability
Metrics
7.8
Priority
XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.
Source: NVD, CVSS v3
7.8
CVSS v3
Severity High on the scale from 0 to 10.
Source: Msrc Update Guide, CVE.org, Debian LTS, Ubuntu, EUVD, Debian
0.2 %
EPSS score
Low — model estimates < 1% exploitation likelihood.
Source: FIRST EPSS, percentile 8.0
Show all metrics
- Severity
- High
Priority (0–325)
The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?
Read in glossary- 57.27 Methodology
Exploit maturity
An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.
Read in glossary- no public PoC known
XIEM Effective CVSS
XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.
Read in glossary- 7.8 Methodology
CVSS v3
CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.
Read in glossary- 7.8
EPSS score
The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.
Read in glossary- 0.2 %
- Low — model estimates < 1% exploitation likelihood.
EPSS percentile
The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.
Read in glossary- 8.0
- Low — this CVE sits in the lower 10% of all CVEs scored today.
KEV status
The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.
Read in glossary- —
- Published
CWE
CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.
Read in glossary- CWE-305
Detection rules
No NEOSEC detection rule is available for this vulnerability yet.
Classification under NIS2 and CRA
Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.
NIS2
NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.
Read in glossary- High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
CRA
The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.
Read in glossary- From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001
ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.
Read in glossary- Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.
Description
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`.
Source: Microsoft Security Update Guide, cvelistv5, Debian LTS Advisories, NVD (NIST), CVE.org (MITRE), Ubuntu Security Notices, ENISA EUVD, Debian Security Advisories
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| SUSE | Container suse/sle-micro-rancher/5.3:latest |
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| SUSE | Container suse/sle-micro-rancher/5.4:latest |
|
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| SUSE | Container suse/sle-micro/5.5:latest |
|
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| SUSE | Image SLES15-SP4-SAP-BYOS |
|
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| SUSE | Image SLES15-SP4-SAP-BYOS-Azure |
|
|
| SUSE | Image SLES15-SP4-SAP-BYOS-EC2 |
|
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| SUSE | Image SLES15-SP4-SAP-BYOS-GCE |
|
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| SUSE | Image SLES15-SP4-SAP-Hardened |
|
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| SUSE | Image SLES15-SP4-SAP-Hardened-BYOS |
|
|
| SUSE | Image SLES15-SP4-SAP-Hardened-BYOS-Azure |
|
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| SUSE | Image SLES15-SP4-SAP-Hardened-BYOS-EC2 |
|
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| SUSE | Image SLES15-SP4-SAP-Hardened-BYOS-GCE |
|
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| SUSE | Image SLES15-SP4-SAP-Hardened-GCE |
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| SUSE | SUSE Linux Enterprise Desktop 15 SP7 |
|
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| SUSE | SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS |
|
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| SUSE | SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS |
|
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| SUSE | SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS |
|
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| SUSE | SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS |
|
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| SUSE | SUSE Linux Enterprise High Performance Computing 15 SP7 |
|
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| SUSE | SUSE Linux Enterprise Micro 5.3 |
|
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| SUSE | SUSE Linux Enterprise Micro 5.4 |
|
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| SUSE | SUSE Linux Enterprise Micro 5.5 |
|
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| SUSE | SUSE Linux Enterprise Module for Basesystem 15 SP7 |
|
|
| SUSE | SUSE Linux Enterprise Server 15 SP4-LTSS |
|
|
| SUSE | SUSE Linux Enterprise Server 15 SP5-LTSS |
|
|
| SUSE | SUSE Linux Enterprise Server 15 SP6-LTSS |
|
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| SUSE | SUSE Linux Enterprise Server 15 SP7 |
|
|
| SUSE | SUSE Linux Enterprise Server for SAP Applications 15 SP4 |
|
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| SUSE | SUSE Linux Enterprise Server for SAP Applications 15 SP5 |
|
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| SUSE | SUSE Linux Enterprise Server for SAP Applications 15 SP6 |
|
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| SUSE | SUSE Linux Enterprise Server for SAP Applications 15 SP7 |
|
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| SUSE | SUSE Manager Proxy LTS 4.3 |
|
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| SUSE | SUSE Manager Retail Branch Server LTS 4.3 |
|
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| SUSE | SUSE Manager Server LTS 4.3 |
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Vendors and products
- Debian
- SUSE Suse Linux Enterprise Desktop 15 Sp7
- SUSE Suse Linux Enterprise High Performance Computing 15 Sp4-espos
- SUSE Suse Linux Enterprise High Performance Computing 15 Sp4-ltss
- SUSE Suse Linux Enterprise High Performance Computing 15 Sp5-espos
- SUSE Suse Linux Enterprise High Performance Computing 15 Sp5-ltss
- SUSE Suse Linux Enterprise Module For Basesystem 15 Sp7
- SUSE Suse Linux Enterprise Server 15 Sp4-ltss
- SUSE Suse Linux Enterprise Server 15 Sp5-ltss
- SUSE Suse Linux Enterprise Server 15 Sp6-ltss
- SUSE Suse Linux Enterprise Server 15 Sp7
- SUSE Suse Linux Enterprise Server For Sap Applications 15 Sp4
Affected operating systems
| Linux | debian | haveged | bookworm |
| Linux | debian | haveged | bullseye |
| Linux | debian | haveged | trixie |
| Linux | ubuntu | haveged | jammy |
| Linux | ubuntu | haveged | noble |
| Linux | ubuntu | haveged | questing |
| Linux | ubuntu | haveged | resolute |
Weakness classes (CWE)
CWE-305Authentication Bypass by Primary Weakness
Base
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.
Entry at MITRE CWE-305
References & sources
- bugzilla.suse.comshow_bug.cgi?id=CVE-2026-41054
- openwall.comlists/oss-security/2026/05/19/3
- openwall.comlists/oss-security/2026/05/19/4
- openwall.comlists/oss-security/2026/05/19/5
- openwall.comlists/oss-security/2026/05/20/1
- openwall.comlists/oss-security/2026/05/21/17
- openwall.comlists/oss-security/2026/05/22/1
- lists.debian.orgdebian-lts-announce/2026/06/msg00005.html
Linked advisories
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<a href="https://intel.neosec.eu/en/cve/CVE-2026-41054"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-41054.svg?lang=en" alt="CVE-2026-41054 – NEOSEC Intel" height="20"></a>