CVE-2021-20193

Severity: low (CVSS 3.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-26 · updated 2026-10-14
Weakness: CWE-401

Description

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: through 1.33

References

https://bugzilla.redhat.com/show_bug.cgi?id=1917565
https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777
https://savannah.gnu.org/bugs/?59897
https://security.gentoo.org/glsa/202105-29
https://bugzilla.redhat.com/show_bug.cgi?id=1917565
https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777
https://savannah.gnu.org/bugs/?59897
https://security.gentoo.org/glsa/202105-29
https://cert-portal.siemens.com/productcert/html/ssa-398330.html

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