CVE-2025-21765
Medium
Elevated severity or exploit probability.
CVSS base
8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.6%
47.4th percentile
CISA KEV
Not listed
Weakness / dates
—
Published 2025-02-27 · modified 2026-07-30
CVSS breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | N | Network |
| Attack Complexity | H | High |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2025-02-27 — Published (NVD)
- 2026-07-30 — Last modified (NVD)
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.
Affected
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
- 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-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html