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Fencer Intel
high 7.8

CVE-2026-41054 json

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

published 5mo ago modified 3mo ago also EUVD-2026-31076

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 8%
public exploits
0
none known

Summary

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`.

Patch / fix

  • 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 SUSE Linux Enterprise Desktop 15 SP7 1.9.14-150600.11.6.1
  • SUSE SUSE Linux Enterprise High Performance Computing 15 SP7 1.9.14-150600.11.6.1
  • SUSE SUSE Linux Enterprise Module for Basesystem 15 SP7 1.9.14-150600.11.6.1
  • SUSE SUSE Linux Enterprise Server 15 SP7 1.9.14-150600.11.6.1
  • SUSE SUSE Linux Enterprise Server for SAP Applications 15 SP7 1.9.14-150600.11.6.1
  • SUSE SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS 1.9.14-150400.3.11.1
  • SUSE SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS 1.9.14-150400.3.11.1
  • SUSE SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS 1.9.14-150400.3.11.1
  • SUSE SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS 1.9.14-150400.3.11.1
  • SUSE SUSE Linux Enterprise Micro 5.3 1.9.14-150400.3.11.1
  • SUSE SUSE Linux Enterprise Micro 5.4 1.9.14-150400.3.11.1
  • SUSE SUSE Linux Enterprise Micro 5.5 1.9.14-150400.3.11.1
  • SUSE SUSE Linux Enterprise Server 15 SP4-LTSS 1.9.14-150400.3.11.1
  • SUSE SUSE Linux Enterprise Server 15 SP5-LTSS 1.9.14-150400.3.11.1
  • SUSE SUSE Linux Enterprise Server 15 SP6-LTSS 1.9.14-150600.11.6.1
  • SUSE SUSE Linux Enterprise Server for SAP Applications 15 SP4 1.9.14-150400.3.11.1
  • SUSE SUSE Linux Enterprise Server for SAP Applications 15 SP5 1.9.14-150400.3.11.1
  • haveged Debian 12 1.9.14-1+deb12u1
  • haveged Debian 13 1.9.19-12+deb13u1
  • haveged Debian 14 1.9.21-1

debian advisories DEBIAN-CVE-2026-41054

  • haveged Ubuntu 25.10 1.9.19-12+deb13u1build0.25.10.1
  • haveged Ubuntu 26.04 LTS 1.9.19-14ubuntu0.1
  • haveged Ubuntu Pro 22.04 LTS 1.9.14-1ubuntu1+esm1~22.04.1
  • haveged Ubuntu Pro 24.04 LTS 1.9.14-1ubuntu2+esm1~24.04.1

ubuntu advisories UBUNTU-CVE-2026-41054

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • haveged openSUSE Leap 16.0 1.9.19-bp160.2.1
  • haveged openSUSE Tumbleweed 1.9.21-1.1

opensuse advisories openSUSE-SU-2026:21958-1openSUSE-SU-2026:10833-1

  • haveged Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 1.9.21-r0

alpine advisories ALPINE-CVE-2026-41054

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • haveged Azure Linux 3.0 1.9.22-1

azure linux advisories AZL-87113

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2026-41054 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-41054 updated cvss 7.8

haveged: haveged: Privilege escalation due to insufficient credential check

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
5mo ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • SUSE Container suse/sle-micro-rancher/5.3:latest
  • SUSE Container suse/sle-micro-rancher/5.4:latest
  • SUSE Container suse/sle-micro/5.5:latest
  • SUSE Image SLES15-SP4-SAP-BYOS
  • SUSE Image SLES15-SP4-SAP-BYOS-Azure
  • SUSE Image SLES15-SP4-SAP-BYOS-EC2
  • SUSE Image SLES15-SP4-SAP-BYOS-GCE
  • SUSE Image SLES15-SP4-SAP-Hardened
  • SUSE Image SLES15-SP4-SAP-Hardened-BYOS
  • SUSE Image SLES15-SP4-SAP-Hardened-BYOS-Azure
  • SUSE Image SLES15-SP4-SAP-Hardened-BYOS-EC2
  • SUSE Image SLES15-SP4-SAP-Hardened-BYOS-GCE
  • SUSE Image SLES15-SP4-SAP-Hardened-GCE
  • SUSE SUSE Linux Enterprise Desktop 15 SP7
  • SUSE SUSE Linux Enterprise High Performance Computing 15 SP7
  • SUSE SUSE Linux Enterprise Module for Basesystem 15 SP7
  • SUSE SUSE Linux Enterprise Server 15 SP7
  • SUSE SUSE Linux Enterprise Server for SAP Applications 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 Micro 5.3
  • SUSE SUSE Linux Enterprise Micro 5.4
  • SUSE SUSE Linux Enterprise Micro 5.5
  • 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 for SAP Applications 15 SP4
  • SUSE SUSE Linux Enterprise Server for SAP Applications 15 SP5
  • SUSE SUSE Linux Enterprise Server for SAP Applications 15 SP6
  • SUSE SUSE Manager Proxy LTS 4.3
  • SUSE SUSE Manager Retail Branch Server LTS 4.3
  • SUSE SUSE Manager Server LTS 4.3

Classification

Weakness
  • CWE-305 Authentication Bypass by Primary Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.