Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2021-20193

CVE-2021-20193LOW

n/a tar — A flaw was found in the src/list.c of tar 1.33 and earlier.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   N   R  U  N  N  L    3.3   .0109   64.7     —

AFFECTED
  Product  Versions            Fixed
  tar      1.33 and earlier –  —

TIMELINE
  Dec 17  Reserved by redhat
  Mar 26  Published (CNA: redhat)
  Oct 8   ENRICHED — CVE-2021-20193 (tar). Received CVSS 3.3 and CPE data from NVD.

CWE-125, CWE-401 · CNA: redhat · CVSS v3.1 · 5 references · NVD status: Modified

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
December 17, 2020	Reserved	Reserved by redhat
March 26, 2021	Published	Published (CNA: redhat)
October 8, 2026	ENRICHED	ENRICHED — CVE-2021-20193 (tar). Received CVSS 3.3 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	tar	—	1.33 and earlier	—

Weaknesses

CWE-125 · CWE-401

References (5)

https://bugzilla.redhat.com/show_bug.cgi?id=1917565 [Issue Tracking, Patch, Third Party Advisory]
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777 [Mailing List, Patch, Third Party Advisory]
https://savannah.gnu.org/bugs/?59897 [Issue Tracking, Patch, Vendor Advisory]
https://security.gentoo.org/glsa/202105-29 [Third Party Advisory]

Authoritative record: CVE-2021-20193 at cve.org

Weaknesses: CWE-125 · CWE-401

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-20193 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.