CVE-2025-21765 The advisory has been revoked - it doesn't affect any version of package kernel-devel-matched (opens in a new tab)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.
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Test your applications- Snyk IDSNYK-ALMALINUX10-KERNELDEVELMATCHED-14119419
- published26 Nov 2025
- disclosed11 Nov 2025
Introduced: 11 Nov 2025
CVE-2025-21765 (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-devel-matched package and not the kernel-devel-matched package as distributed by AlmaLinux.
In the Linux kernel, the following vulnerability has been resolved:
ipv6: use RCU protection in ip6_default_advmss()
ip6_default_advmss() needs rcu protection to make sure the net structure it reads does not disappear.
References
- https://errata.almalinux.org/10/ALSA-2025-20095.html
- https://errata.almalinux.org/9/ALSA-2025-20518.html
- https://access.redhat.com/security/cve/CVE-2025-21765
- https://www.redhat.com/security/data/cve/CVE-2025-21765.html
- https://access.redhat.com/errata/RHSA-2025:20095
- https://access.redhat.com/errata/RHSA-2025:20518
- https://git.kernel.org/stable/c/28de355b63ad42309ed5a03ee7c436c90512265b
- https://git.kernel.org/stable/c/3c8ffcd248da34fc41e52a46e51505900115fc2a
- https://git.kernel.org/stable/c/4176a68b0db8fc74ac14fcd00ba8231371051dc2
- https://git.kernel.org/stable/c/550ed693f47370502a71b85382e7f9e6417300b8
- https://git.kernel.org/stable/c/713a40c892f40300d63691d9f85b2a23b48fe1e8
- https://git.kernel.org/stable/c/78ad057472d8c76e0602402269222f9f9c698790
- https://git.kernel.org/stable/c/84212387caadb211cd9dadd6fd5563bd37dc1f5e
- https://git.kernel.org/stable/c/d02f30d220ef9511568a48dba8a9004c65f8d904
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html