CVE-2025-40158 The advisory has been revoked - it doesn't affect any version of package kernel-debug-devel-matched (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-ALMALINUX10-KERNELDEBUGDEVELMATCHED-15236690
- published6 Feb 2026
- disclosed9 Feb 2026
Introduced: 6 Feb 2026
CVE-2025-40158 (opens in a new tab)Amendment
The AlmaLinux security team deemed this advisory irrelevant for AlmaLinux:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-devel-matched package and not the kernel-debug-devel-matched package as distributed by AlmaLinux.
In the Linux kernel, the following vulnerability has been resolved:
ipv6: use RCU in ip6_output()
Use RCU in ip6_output() in order to use dst_dev_rcu() to prevent possible UAF.
We can remove rcu_read_lock()/rcu_read_unlock() pairs from ip6_finish_output2().
References
- https://errata.almalinux.org/10/ALSA-2026-1690.html
- https://errata.almalinux.org/9/ALSA-2026-2212.html
- https://errata.almalinux.org/8/ALSA-2026-2264.html
- https://access.redhat.com/security/cve/CVE-2025-40158
- https://access.redhat.com/errata/RHSA-2026:1690
- https://access.redhat.com/errata/RHSA-2026:2212
- https://access.redhat.com/errata/RHSA-2026:2264
- https://git.kernel.org/stable/c/0393f85c3241c19ba8550f04a812e7d19f6b3082
- https://git.kernel.org/stable/c/11709573cc4e48dc34c80fc7ab9ce5b159e29695