CVE-2025-21765

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 3.1

5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.6% chance of exploitation in the next 30 days; higher than 49% of CVEs (scores of 2026-10-25)

Published

2025-02-27

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

Affected

• linux:linux_kernel

References

• 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

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