Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 2.6.26, < 5.4.291 |
References
- https://git.kernel.org/stable/c/28de355b63ad42309ed5a03ee7c436c90512265bPatch
- https://git.kernel.org/stable/c/3c8ffcd248da34fc41e52a46e51505900115fc2aPatch
- https://git.kernel.org/stable/c/4176a68b0db8fc74ac14fcd00ba8231371051dc2Patch
- https://git.kernel.org/stable/c/550ed693f47370502a71b85382e7f9e6417300b8Patch
- https://git.kernel.org/stable/c/713a40c892f40300d63691d9f85b2a23b48fe1e8Patch
- https://git.kernel.org/stable/c/78ad057472d8c76e0602402269222f9f9c698790Patch
- https://git.kernel.org/stable/c/84212387caadb211cd9dadd6fd5563bd37dc1f5ePatch
- https://git.kernel.org/stable/c/d02f30d220ef9511568a48dba8a9004c65f8d904Patch
- 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
FAQ
What is CVE-2025-21765?
CVE-2025-21765 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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...
How severe is CVE-2025-21765?
CVE-2025-21765 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-21765?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.