Is CVE-2021-33844 in the CISA KEV catalog?

No. CVE-2021-33844 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-33844?

CVE-2021-33844 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-33844?

CVE-2021-33844 has an EPSS score of 0.46% (37th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-33844?

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-2021-33844

MEDIUM

5.5

CVSS v3

NVD

Description

A floating point exception (divide-by-zero) issue was discovered in SoX in functon startread() of wav.c file. An attacker with a crafted wav file, could cause an application to crash.

CWE-369

How to fix

Remediation Available

soxDebian

Fixed in:14.4.2+git20190427-2+deb11u1CVE-2021-33844

Fixed in:14.4.2+git20190427-3.1CVE-2021-33844

libsox2Ubuntu

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

Fixed in:14.4.1-3ubuntu1.1+esm3USN-5904-2

Fixed in:14.4.1-5+deb8u4ubuntu0.1+esm2USN-5904-2

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:14.4.2-3ubuntu0.18.04.3USN-5904-2

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

Fixed in:14.4.2+git20190427-2+deb11u2build0.20.04.1USN-5904-2

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

Fixed in:14.4.2+git20190427-2+deb11u2build0.22.04.1USN-5904-2

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

Fixed in:14.4.2+git20190427-3ubuntu0.2USN-5904-2

soxUbuntu

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

Fixed in:14.4.1-3ubuntu1.1+esm3USN-5904-2

Fixed in:14.4.1-5+deb8u4ubuntu0.1+esm2USN-5904-2

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

Fixed in:14.4.2-3ubuntu0.18.04.3USN-5904-2

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

Fixed in:14.4.2+git20190427-2+deb11u2build0.20.04.1USN-5904-2

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

Fixed in:14.4.2+git20190427-2+deb11u2build0.22.04.1USN-5904-2

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

Fixed in:14.4.2+git20190427-3ubuntu0.2USN-5904-2

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-369 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2012-0207	High	7.5	20%	-	Fix
CVE-2017-8537	Medium	5.5	17%	-	-
CVE-2017-8536	Medium	5.5	17%	-	-
CVE-2017-8535	Medium	5.5	17%	-	-
CVE-2007-2237	Medium	5.5	15%	-	-
CVE-2025-0317	High	7.5	13%	-	-

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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.