CVE-2021-22600

Name	CVE-2021-22600
Description	A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755
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	DLA-2941-1, DSA-5096-1

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)	4.19.282-1	fixed
	bullseye	5.10.178-3	fixed
	bullseye (security)	5.10.179-1	fixed
	bookworm, sid	6.1.27-1	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	4.19.232-1	DSA-5096-1
linux	source	bullseye	5.10.92-1
linux	source	(unstable)	5.15.15-1
linux-4.19	source	stretch	4.19.232-1~deb9u1	DLA-2941-1

[stretch] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/ec6af094ea28f0f2dda1a6a33b14cd57e36a9755 (5.16-rc6)