CVE-2021-20193: GNU Tar

Low severity, CVSS 3.3. EPSS: 1.1% chance of exploitation in the next 30 days.

A flaw was found in the src/list.c of tar 1.33 and earlier. This flaw allows an attacker who can submit a crafted input file to tar to cause uncontrolled consumption of memory. The highest threat from this vulnerability is to system availability.

Affected products

• GNU Tar: up to and including 1.33

Published 2021-03-26. Last modified 2026-10-08.