CVE-2022-45873

systemd 250 and 251 allows local users to achieve a systemd-coredump deadlock by triggering a crash that has a long backtrace. This occurs in parse_elf_object in shared/elf-util.c. The exploitation methodology is to crash a binary calling the same function recursively, and put it in a deeply nested directory to make its backtrace large enough to cause the deadlock. This must be done 16 times when MaxConnections=16 is set for the systemd/units/systemd-coredump.socket file.

• CWE-400
• CWE-400

• https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437Patch, Third Party Advisory
• https://github.com/systemd/systemd/pull/24853#issuecomment-1326561497Issue Tracking, Patch, Third Party Advisory
• https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553Issue Tracking, Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MS5N5SLYAHKENLAJWYBDKU55ICU3SVZF/
• https://github.com/systemd/systemd/commit/076b807be472630692c5348c60d0c2b7b28ad437Patch, Third Party Advisory
• https://github.com/systemd/systemd/pull/24853#issuecomment-1326561497Issue Tracking, Patch, Third Party Advisory
• https://github.com/systemd/systemd/pull/25055#issuecomment-1313733553Issue Tracking, Patch, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MS5N5SLYAHKENLAJWYBDKU55ICU3SVZF/

Published

Nov 23, 2022

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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