Description
basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving strdupa and alloca for a pathname controlled by a local attacker) that results in an operating system crash.
Affected products
systemd_project: systemd; fedoraproject: fedora; debian: debian linux; netapp: hci management node; netapp: solidfire
References10
- www.openwall.com/lists/oss-security/2021/08/04/2 Mailing ListPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2021/08/17/3 Mailing ListPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2021/09/07/3 Mailing ListPatchThird Party Advisory
- github.com/systemd/systemd-stable/commit/4a1c5f34bd3e1daed4490e… PatchThird Party Advisory
- github.com/systemd/systemd-stable/commit/764b74113e36ac5219a4b8… PatchThird Party Advisory
- github.com/systemd/systemd-stable/commit/b00674347337b7531c92fd… PatchThird Party Advisory
- github.com/systemd/systemd-stable/commit/cfd14c65374027b34dbbc4… PatchThird Party Advisory
- github.com/systemd/systemd/commit/b34a4f0e6729de292cb3b0c03c1d4… PatchThird Party Advisory
- github.com/systemd/systemd/pull/20256/commits/441e0115646d54f08… PatchThird Party Advisory
- www.openwall.com/lists/oss-security/2021/08/04/2 Mailing ListPatchThird Party Advisory
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 9% percentile: 95 · as of 6 November 2026
- CWE
- CWE-770
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.