CVE-2021-3428

Name	CVE-2021-3428
Description	A flaw was found in the Linux kernel. A denial of service problem is identified if an extent tree is corrupted in a crafted ext4 filesystem in fs/ext4/extents.c in ext4_es_cache_extent. Fabricating an integer overflow, A local attacker with a special user privilege may cause a system crash problem which can lead to an availability threat.
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-2610-1, DLA-2689-1

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)	4.19.269-1	fixed
	bullseye	5.10.158-2	fixed
	bullseye (security)	5.10.162-1	fixed
	bookworm, sid	6.1.20-1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	stretch	4.9.272-1	DLA-2689-1
linux	source	buster	4.19.181-1
linux	source	(unstable)	5.8.7-1
linux-4.19	source	stretch	4.19.181-1~deb9u1	DLA-2610-1

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=1936786
https://www.openwall.com/lists/oss-security/2021/03/17/1
https://bugzilla.suse.com/show_bug.cgi?id=1173485