CVE-2021-4156

Publication date 23 March 2022

Last updated 25 August 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.1 · High

Score breakdown

Description

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.

Why is this CVE low priority?

This only results in a DoS when reading a FLAC file

Learn more about Ubuntu priority

Status

Package Ubuntu Release Status
libsndfile 24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar Ignored end of life, was needed
22.10 kinetic Ignored end of life, was needed
22.04 LTS jammy
Fixed 1.0.31-2ubuntu0.2
21.10 impish Ignored end of life
21.04 hirsute Ignored end of life
20.04 LTS focal
Fixed 1.0.28-7ubuntu0.3
18.04 LTS bionic
Fixed 1.0.28-4ubuntu0.18.04.2+esm2
16.04 LTS xenial
Fixed 1.0.25-10ubuntu0.16.04.3+esm2
14.04 LTS trusty
Fixed 1.0.25-7ubuntu2.2+esm4

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libsndfile

Severity score breakdown

Parameter Value
Base score 7.1 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-7273-1
    • libsndfile vulnerabilities
    • 18 February 2025

Other references