Is CVE-2021-23159 in the CISA KEV catalog?

No. CVE-2021-23159 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-23159?

CVE-2021-23159 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-23159?

CVE-2021-23159 has an EPSS score of 0.46% (37th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-23159?

Upgrade sox on debian 11 to 14.4.2+git20190427-2+deb11u1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-23159

MEDIUM

5.5

CVSS v3

NVD

Description

A vulnerability was found in SoX, where a heap-buffer-overflow occurs in function lsx_read_w_buf() in formats_i.c file. The vulnerability is exploitable with a crafted file, that could cause an application to crash.

CWE-120Classic Buffer Overflow CWE-787Out-of-bounds Write

How to fix

Remediation Available

soxDebian

Fixed in:14.4.2+git20190427-2+deb11u1CVE-2021-23159

Fixed in:14.4.2+git20190427-3.2CVE-2021-23159

libsox2Ubuntu

Fixed in:14.4.1-3ubuntu1.1+esm2USN-5904-1

Fixed in:14.4.1-5+deb8u4ubuntu0.1+esm1USN-5904-1

libsox3Ubuntu

Fixed in:14.4.2-3ubuntu0.18.04.2USN-5904-1

Fixed in:14.4.2+git20190427-2+deb11u1build0.20.04.1USN-5904-1

Fixed in:14.4.2+git20190427-2+deb11u1build0.22.04.1USN-5904-1

Fixed in:14.4.2+git20190427-3ubuntu0.1USN-5904-1

soxUbuntu

Fixed in:14.4.1-3ubuntu1.1+esm2USN-5904-1

Fixed in:14.4.1-5+deb8u4ubuntu0.1+esm1USN-5904-1

Fixed in:14.4.2-3ubuntu0.18.04.2USN-5904-1

Fixed in:14.4.2+git20190427-2+deb11u1build0.20.04.1USN-5904-1

Fixed in:14.4.2+git20190427-2+deb11u1build0.22.04.1USN-5904-1

Fixed in:14.4.2+git20190427-3ubuntu0.1USN-5904-1

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

AvailabilityHigh

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

Exploit Intelligence

0.46%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Exploit1

sourceforge.net

Third-Party Advisory3

Related Vulnerabilities

Other CWE-120 (Classic Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0195	Medium	6.8	100%	-	Fix
CVE-2017-7269	Critical	9.8	100%	KEV	-
CVE-2019-11043	High	8.7	99%	KEV + Ransom	Fix
CVE-2011-4862	High	10.0	95%	-	Fix
CVE-2007-5659	High	7.8	94%	KEV	Fix
CVE-2022-3786	High	7.5	91%	-	Fix

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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 2025-06-27.