CVE-2021-33910
MEDIUM 5.5EPSS 8.8%
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.
- CVSS v3.1 NVD
- 5.5 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS v2.0 NVD
- 4.9 MEDIUM
AV:L/AC:L/Au:N/C:N/I:N/A:C - EPSS
- 8.79% chance of exploitation in the next 30 days, 95th percentile
- Published
- 2021-07-20
- Updated
- 2026-10-14
Proof-of-concept exploits (2)
- http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Laye…
- https://www.openwall.com/lists/oss-security/2021/07/20/2
Security advisories
- http://www.openwall.com/lists/oss-security/2021/08/04/2
- http://www.openwall.com/lists/oss-security/2021/08/17/3
- http://www.openwall.com/lists/oss-security/2021/09/07/3
- systemd/systemd-stable/commit/4a1c5f34bd3e1daed4490e9d97918e504d19733b
- systemd/systemd/commit/b34a4f0e6729de292cb3b0c03c1d48f246ad896b
- https://security.gentoo.org/glsa/202107-48
- https://security.netapp.com/advisory/ntap-20211104-0008
- https://www.debian.org/security/2021/dsa-4942