CVE-2020-25669

Name	CVE-2020-25669
Description	A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
References	DLA-2483-1, DLA-2494-1
NVD severity	high

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	stretch	4.9.228-1	vulnerable
	stretch (security)	4.9.272-2	fixed
	buster	4.19.194-1	fixed
	buster (security)	4.19.194-3	fixed
	bullseye	5.10.46-4	fixed
	bullseye (security)	5.10.46-5	fixed
	bookworm	5.14.6-2	fixed
	sid	5.14.6-3	fixed
linux-4.19 (PTS)	stretch (security)	4.19.194-3~deb9u1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	stretch	4.9.246-1	DLA-2494-1
linux	source	buster	4.19.160-1
linux	source	(unstable)	5.9.11-1
linux-4.19	source	stretch	4.19.160-2~deb9u1	DLA-2483-1

https://www.openwall.com/lists/oss-security/2020/11/05/2