CVE-2021-47232

Name	CVE-2021-47232
Description	In the Linux kernel, the following vulnerability has been resolved: can: j1939: fix Use-after-Free, hold skb ref while in use This patch fixes a Use-after-Free found by the syzbot. The problem is that a skb is taken from the per-session skb queue, without incrementing the ref count. This leads to a Use-after-Free if the skb is taken concurrently from the session queue due to a CTS.
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	fixed
	bullseye (security)	5.10.226-1	fixed
	bookworm	6.1.123-1	fixed
	bookworm (security)	6.1.119-1	fixed
	trixie	6.12.6-1	fixed
	sid	6.12.9-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
linux	source	buster	(not affected)
linux	source	(unstable)	5.10.46-1

[buster] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/2030043e616cab40f510299f09b636285e0a3678 (5.13-rc7)