CVE-2025-21945

ksmbd: fix use-after-free in smb2_lock

CVSS 7.8 HIGHEPSS 0.2%CWE-416

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

01 Apr 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in smb2_lock If smb_lock->zero_len has value, ->llist of smb_lock is not delete and flock is old one. It will cause use-after-free on error handling routine.

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

Affected products

Linux · Linux

References

https://git.kernel.org/stable/c/410ce35a2ed6d0e114132bba29af49b69880c8c7 https://git.kernel.org/stable/c/636e021646cf9b52ddfea7c809b018e91f2188cb https://git.kernel.org/stable/c/84d2d1641b71dec326e8736a749b7ee76a9599fc https://git.kernel.org/stable/c/8573571060ca466cbef2c6f03306b2cc7b883506 https://git.kernel.org/stable/c/a0609097fd10d618aed4864038393dd75131289e https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html