CVE-2025-21766

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
LinuxCNA
---
---
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 14%
VendorProductVersion
linuxlinux_kernel
4.14.200 ≤
𝑥
< 4.15
linuxlinux_kernel
4.19.148 ≤
𝑥
< 4.20
linuxlinux_kernel
5.4.68 ≤
𝑥
< 5.5
linuxlinux_kernel
5.8.12 ≤
𝑥
< 5.9
linuxlinux_kernel
5.9.1 ≤
𝑥
< 5.15.179
linuxlinux_kernel
5.16 ≤
𝑥
< 6.1.129
linuxlinux_kernel
6.2 ≤
𝑥
< 6.6.79
linuxlinux_kernel
6.7 ≤
𝑥
< 6.12.16
linuxlinux_kernel
6.13 ≤
𝑥
< 6.13.4
linuxlinux_kernel
5.9
linuxlinux_kernel
5.9:rc7
linuxlinux_kernel
5.9:rc8
linuxlinux_kernel
6.14:rc1
linuxlinux_kernel
6.14:rc2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bullseye
vulnerable
bullseye (security)
vulnerable
bookworm
6.1.148-1
fixed
bookworm (security)
6.1.158-1
fixed
trixie
6.12.57-1
fixed
trixie (security)
6.12.48-1
fixed
forky
6.17.9-1
fixed
sid
6.17.10-1
fixed
linux-6.1
bullseye (security)
6.1.158-1~deb11u1
fixed
References
https://git.kernel.org/stable/c/139512191bd06f1b496117c76372b2ce372c9a41
https://git.kernel.org/stable/c/4583748b65dee4d61bd50a2214715b4237bc152a
https://git.kernel.org/stable/c/9b1766d1ff5fe496aabe9fc5f4e34e53f35c11c4
https://git.kernel.org/stable/c/a39f61d212d822b3062d7f70fa0588e50e55664e
https://git.kernel.org/stable/c/ce3c6165fce0f06305c806696882a3ad4b90e33f
https://git.kernel.org/stable/c/ea07480b23225942208f1b754fea1e7ec486d37e
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html