CVE-2020-25220

Name	CVE-2020-25220
Description	The Linux kernel 4.9.x before 4.9.233, 4.14.x before 4.14.194, and 4.19.x before 4.19.140 has a use-after-free because skcd->no_refcnt was not considered during a backport of a CVE-2020-14356 patch. This is related to the cgroups feature.
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-2420-1

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	Urgency	Origin	Debian Bugs
linux	source	stretch	4.9.240-1		DLA-2420-1
linux	source	(unstable)	(not affected)

Notes

- linux <not-affected> (Vulnerable code not present and no partial CVE-2020-14356 fix backported)
https://bugzilla.redhat.com/show_bug.cgi?id=1868453
https://www.spinics.net/lists/stable/msg405099.html