CVE-2020-8428

Name	CVE-2020-8428
Description	fs/namei.c in the Linux kernel before 5.5 has a may_create_in_sticky use-after-free, which allows local users to cause a denial of service (OOPS) or possibly obtain sensitive information from kernel memory, aka CID-d0cb50185ae9. One attack vector may be an open system call for a UNIX domain socket, if the socket is being moved to a new parent directory and its old parent directory is being removed.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2242-1, DSA-4667-1, DSA-4698-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bullseye	5.10.223-1	fixed
	bullseye (security)	5.10.226-1	fixed
	bookworm	6.1.115-1	fixed
	bookworm (security)	6.1.119-1	fixed
	trixie	6.11.10-1	fixed
	sid	6.12.5-1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	jessie	(not affected)
linux	source	stretch	4.9.210-1+deb9u1	DSA-4698-1
linux	source	buster	4.19.98-1+deb10u1	DSA-4667-1
linux	source	(unstable)	5.4.19-1
linux-4.9	source	jessie	4.9.210-1+deb9u1~deb8u1	DLA-2242-1

[jessie] - linux <not-affected> (Vulnerable code introduced later)
Fixed by: https://git.kernel.org/linus/d0cb50185ae942b03c4327be322055d622dc79f6