Is CVE-2021-20193 in the CISA KEV catalog?

No. CVE-2021-20193 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-20193?

CVE-2021-20193 has a CVSS v3 base score of 3.3 (LOW).

What is the EPSS score for CVE-2021-20193?

CVE-2021-20193 has an EPSS score of 1.09% (61th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-20193?

Upgrade tar on debian 11 to 1.34+dfsg-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-20193

LOW

3.3

CVSS v3

NVD

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.

CWE-401Missing Release of Memory (Memory Leak)CWE-125Out-of-bounds Read

How to fix

Remediation Available

tarDebian

Fixed in:1.34+dfsg-1CVE-2021-20193

tarUbuntu

Fixed in:1.27.1-1ubuntu0.1+esm2USN-5329-1

Fixed in:1.28-2.1ubuntu0.2+esm1USN-5329-1

Fixed in:1.29b-2ubuntu0.3USN-5329-1

Fixed in:1.30+dfsg-7ubuntu0.20.04.2USN-5329-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Exploit Intelligence

1.09%probability of exploitation in 30 days

61stpercentile

Moderate risk: more likely to be exploited than 61% of all known CVEs.

References

Patch3

Third-Party Advisory1

security.gentoo.org

Related Vulnerabilities

Other CWE-401 (Missing Release of Memory (Memory Leak)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13934	High	7.5	64%	-	Fix
CVE-2016-6304	High	7.5	63%	-	Fix
CVE-2019-12265	Medium	5.3	55%	-	Fix
CVE-2001-0136	Medium	5.0	45%	-	-
CVE-2016-4232	High	7.5	36%	-	-
CVE-2001-0543	Medium	5.0	21%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-05-05.