CVE-2021-3246

Name: CVE-2021-3246
Creator: NVD / NIST
Published: 2021-07-20T15:15:11.053+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 3.29%

Last modified Jun 17, 2026

CVE-2021-3246 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 3.29% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

3.29%

86.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Libsndfile Project	Libsndfile	1.0.30
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

https://github.com/libsndfile/libsndfile/issues/687Exploit, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/07/msg00024.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DLUDCEMMPRA3IYYYHVZUOUZXI65FU37V/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7LNW4AVDVL3BU3N3KGVFLTYFASBVCIF/
https://security.gentoo.org/glsa/202309-11
https://www.debian.org/security/2021/dsa-4947Third Party Advisory
https://github.com/libsndfile/libsndfile/issues/687Exploit, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/07/msg00024.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DLUDCEMMPRA3IYYYHVZUOUZXI65FU37V/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7LNW4AVDVL3BU3N3KGVFLTYFASBVCIF/
https://security.gentoo.org/glsa/202309-11
https://www.debian.org/security/2021/dsa-4947Third Party Advisory

Timeline

Published: Jul 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3246?

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.

How severe is CVE-2021-3246?

CVE-2021-3246 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 3.29% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3246?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-3246?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST