CVE-2021-4156: Debian Linux

High severity, CVSS 7.1. EPSS: 1.8% chance of exploitation in the next 30 days.

An out-of-bounds read flaw was found in libsndfile's FLAC codec functionality. An attacker who is able to submit a specially crafted file (via tricking a user to open or otherwise) to an application linked with libsndfile and using the FLAC codec, could trigger an out-of-bounds read that would most likely cause a crash but could potentially leak memory information that could be used in further exploitation of other flaws.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only
• Libsndfile Project Libsndfile: version 1.1.10 only

Published 2022-03-23. Last modified 2026-06-17.