CVE-2022-2526

NameCVE-2022-2526
DescriptionA 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.
SourceCVE (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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
systemd (PTS)buster, buster (security)241-7~deb10u8fixed
bullseye247.3-7+deb11u1fixed
bookworm252.4-2fixed
sid252.5-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
systemdsource(unstable)240-1

Notes

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

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