Is CVE-2021-3246 in the CISA KEV catalog?

No. CVE-2021-3246 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3246?

CVE-2021-3246 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-3246?

CVE-2021-3246 has an EPSS score of 3.29% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3246?

Upgrade libsndfile on debian 11 to 1.0.31-2 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3246

HIGHEPSS 87th pctl

8.8

CVSS v3

NVD

Description

A heap buffer overflow vulnerability in msadpcm_decode_block of libsndfile 1.0.30 allows attackers to execute arbitrary code via a crafted WAV file.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

libsndfileDebian

Fixed in:1.0.31-2CVE-2021-3246

libsndfileUbuntu

Fixed in:1.0.25-7ubuntu2.2+esm2USN-5025-2

Fixed in:1.0.25-10ubuntu0.16.04.3+esm1USN-5025-2

Fixed in:1.0.28-4ubuntu0.18.04.2USN-5025-1

Fixed in:1.0.28-7ubuntu0.1USN-5025-1

libsndfile1Ubuntu

Fixed in:1.0.25-7ubuntu2.2+esm2USN-5025-2

Fixed in:1.0.25-10ubuntu0.16.04.3+esm1USN-5025-2

Fixed in:1.0.28-4ubuntu0.18.04.2USN-5025-1

Fixed in:1.0.28-7ubuntu0.1USN-5025-1

sndfile-programsUbuntu

Fixed in:1.0.25-7ubuntu2.2+esm2USN-5025-2

Fixed in:1.0.25-10ubuntu0.16.04.3+esm1USN-5025-2

Fixed in:1.0.28-4ubuntu0.18.04.2USN-5025-1

Fixed in:1.0.28-7ubuntu0.1USN-5025-1

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

3.29%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory2

Other references3

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	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 2024-11-21.