CVE-2023-4622

Name	CVE-2023-4622
Description	A use-after-free vulnerability in the Linux kernel's af_unix component can be exploited to achieve local privilege escalation. The unix_stream_sendpage() function tries to add data to the last skb in the peer's recv queue without locking the queue. Thus there is a race where unix_stream_sendpage() could access an skb locklessly that is being released by garbage collection, resulting in use-after-free. We recommend upgrading past commit 790c2f9d15b594350ae9bca7b236f2b1859de02c.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DSA-5492-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	buster	4.19.249-2	vulnerable
	buster (security)	4.19.289-2	vulnerable
	bullseye	5.10.178-3	vulnerable
	bullseye (security)	5.10.191-1	vulnerable
	bookworm	6.1.38-1	vulnerable
	bookworm (security)	6.1.52-1	fixed
	trixie	6.4.13-1	fixed
	sid	6.5.3-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
linux	source	bookworm	6.1.52-1		DSA-5492-1
linux	source	(unstable)	6.4.13-1

https://kernel.dance/790c2f9d15b594350ae9bca7b236f2b1859de02c