CVE-2022-2652

Name	CVE-2022-2652
Description	Depending on the way the format strings in the card label are crafted it's possible to leak kernel stack memory. There is also the possibility for DoS due to the v4l2loopback kernel module crashing when providing the card label on request (reproduce e.g. with many %s modifiers in a row).
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs	1016685

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
v4l2loopback (PTS)	buster	0.12.1-1	vulnerable
	bullseye	0.12.5-1	vulnerable
	bookworm, sid	0.12.7-2	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
v4l2loopback	source	(unstable)	0.12.7-1	unimportant		1016685

Notes

https://huntr.dev/bounties/1b055da5-7a9e-4409-99d7-030280d242d5
https://github.com/umlaeute/v4l2loopback/commit/e4cd225557486c420f6a34411f98c575effd43dd (main)
https://github.com/umlaeute/v4l2loopback/commit/64a216af4c09c9ba9326057d7e78994271827eff (v0.12.6)
Negligible security impact