CVE-2022-0185

Name	CVE-2022-0185
Description	A heap-based buffer overflow flaw was found in the way the legacy_parse_param function in the Filesystem Context functionality of the Linux kernel verified the supplied parameters length. An unprivileged (in case of unprivileged user namespaces enabled, otherwise needs namespaced CAP_SYS_ADMIN privilege) local user able to open a filesystem that does not support the Filesystem Context API (and thus fallbacks to legacy handling) could use this flaw to escalate their privileges on the system.
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)
References	DSA-5050-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	buster	4.19.249-2	fixed
	buster (security)	4.19.260-1	fixed
	bullseye	5.10.140-1	fixed
	bullseye (security)	5.10.136-1	fixed
	bookworm, sid	5.19.11-1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	stretch	(not affected)
linux	source	buster	(not affected)
linux	source	bullseye	5.10.92-1	DSA-5050-1
linux	source	(unstable)	5.15.15-1

Notes

[buster] - linux <not-affected> (Vulnerable code introduced later)
[stretch] - linux <not-affected> (Vulnerable code introduced later)
Fixed by: https://git.kernel.org/linus/722d94847de29310e8aa03fcbdb41fc92c521756
https://www.openwall.com/lists/oss-security/2022/01/18/7
https://www.openwall.com/lists/oss-security/2022/01/25/14
https://www.willsroot.io/2022/01/cve-2022-0185.html