CVE-2022-2526

Name	CVE-2022-2526
Description	A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function and dns_stream_complete() function in 'resolved-dns-stream.c' not incrementing the reference counting for the DnsStream object. Therefore, other functions and callbacks called can dereference the DNSStream object, causing the use-after-free when the reference is still used later.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
systemd (PTS)	bullseye	247.3-7+deb11u5	fixed
	bullseye (security)	247.3-7+deb11u6	fixed
	bookworm	252.31-1~deb12u1	fixed
	sid, trixie	257~rc2-3	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
systemd	source	(unstable)	240-1

https://bugzilla.redhat.com/show_bug.cgi?id=2109926
https://github.com/systemd/systemd/commit/d973d94dec349fb676fdd844f6fe2ada3538f27c (v240)