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Findings

CVE-2021-33910

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…

Published Jul 20, 2021 · updated Oct 14, 2026 · systemd project systemd

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.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 20, 2021 · NIST NVD

    Detected

    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.

  2. Oct 14, 2026 · NIST NVD

    Updated

    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

  • cpe debian/debian linux10.0
  • cpe fedoraproject/fedora33
  • cpe fedoraproject/fedora34
  • cpe netapp/hci management nodeversion unspecified
  • cpe systemd project/systemdversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2021-33910

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-33910

    30-day exploitation probability 8.8%

    first.org
  • NIST NVDVulnerability recordCVE-2021-33910

    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.

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com

References