CVE-2025-21945

Name	CVE-2025-21945
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4193-1, DSA-5900-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bookworm	6.1.176-1	fixed
	bookworm (security)	6.1.187-1	fixed
	trixie	6.12.94-1	fixed
	trixie (security)	6.12.107-1	fixed
	forky	7.1.12-1	fixed
	sid	7.1.13-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
linux	source	bullseye	(not affected)
linux	source	bookworm	6.1.133-1	DSA-5900-1
linux	source	(unstable)	6.12.19-1
linux-6.1	source	bullseye	6.1.137-1~deb11u1	DLA-4193-1

[bullseye] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/84d2d1641b71dec326e8736a749b7ee76a9599fc (6.14-rc6)