A systemd security update has been released for Debian GNU/Linux 9 Extended LTS to address a use-after-free vulnerability.
ELA-675-1 systemd security update
ELA-675-1 systemd security update
Package systemd
Version 232-25+deb9u15 (stretch)
Related CVEs CVE-2022-2526
A use-after-free vulnerability was found in systemd, a system and service manager. 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.
For Debian 9 stretch, these problems have been fixed in version 232-25+deb9u15.
We recommend that you upgrade your systemd packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/
