7.1

CVE-2021-4156: debian debian_linux Out-of-bounds Read

CVSS: 7.1v3.1HighModified
AliasesSUSE-SU-2022:0034-1SUSE-SU-2022:0052-1SUSE-SU-2022:0052-2
Published 23-03-2022Last modified 11-12-2025
Open JSON

Vulnerability summary

CVE-2021-4156 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 1.75% chance of exploitation in the next 30 days, higher than 77.6% of scored vulnerabilities. 2 public exploits are recorded.

Overall risk
39/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (NVD)
EPSS score
1.75%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits2github, reference

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
DLA-3058-1USN-7273-1

Timeline

  1. 23-03-2022
    PublishedVulnerability first disclosed.
  2. 11-12-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

1.75%

Chance of exploitation in the next 30 days

Percentile

78%

Versus all other CVEs

30-day change

0.00 pp

From 1.75% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.75%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

2 found
  • githubUnverified

    Libsndfile

    Maturity: poc

  • referenceUnverified

    Exploit Reference (bugzilla.redhat.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Suse38 products
  • libsndfile&distro=HPE Helion OpenStack 8< 1.0.25-36.26.1
  • libsndfile&distro=SUSE Enterprise Storage 6< 1.0.28-5.15.1
  • libsndfile&distro=SUSE Enterprise Storage 7< 1.0.28-5.15.1
  • libsndfile&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS< 1.0.28-5.15.1
  • libsndfile&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS< 1.0.28-5.15.1
Redhat5 products
  • libsndfile< 0:1.0.28-12.el8
  • libsndfile-debuginfo< 0:1.0.28-12.el8
  • libsndfile-debugsource< 0:1.0.28-12.el8
  • libsndfile-devel< 0:1.0.28-12.el8
  • libsndfile-utils-debuginfo< 0:1.0.28-12.el8
Opensuse3 products
  • libsndfile-progs&distro=openSUSE Leap 15.3< 1.0.28-5.15.1
  • libsndfile&distro=openSUSE Leap 15.3< 1.0.28-5.15.1
  • libsndfile&distro=openSUSE Tumbleweed< 1.0.31-3.1
Debian2 products
  • libsndfile< 1.1.0-1 | < 1.0.28-6+deb10u2 | < 1.0.31-2+deb11u2
  • debian_linuxEOL9.0 | 10.0
Libsndfile_project1 product
Ubuntu1 product
  • libsndfile< 1.0.25-10ubuntu0.16.04.3+esm2 | < 1.0.25-7ubuntu2.2+esm4 | < 1.0.28-4ubuntu0.18.04.2+esm2 | < 1.0.28-7ubuntu0.3 | < 1.0.31-2ubuntu0.2

6 vendors · 50 products

References

25 links
Show all 25 references