| Name | CVE-2025-21766 |
| Description | In the Linux kernel, the following vulnerability has been resolved: ipv4: use RCU protection in __ip_rt_update_pmtu() __ip_rt_update_pmtu() must use RCU protection to make sure the net structure it reads does not disappear. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| linux (PTS) | bullseye | 5.10.223-1 | vulnerable |
| bullseye (security) | 5.10.234-1 | vulnerable |
| bookworm | 6.1.123-1 | vulnerable |
| bookworm (security) | 6.1.128-1 | vulnerable |
| trixie | 6.12.12-1 | vulnerable |
| sid | 6.12.17-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| linux | source | (unstable) | 6.12.16-1 | | | |
Notes
https://git.kernel.org/linus/139512191bd06f1b496117c76372b2ce372c9a41 (6.14-rc3)