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Fencer Vulns
medium 5.3

CVE-2025-56226 json

Libsndfile <=1.2.2 contains a memory leak vulnerability in the mpeg_l3_encoder_init() function within the mpeg_l3_encode.c file.

published 2026-01-14 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-2514

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

Libsndfile <=1.2.2 contains a memory leak vulnerability in the mpeg_l3_encoder_init() function within the mpeg_l3_encode.c file.

Patch / fix

  • libsndfile Debian 13 1.2.2-2+deb13u1
  • libsndfile Debian 14 1.2.2-4

debian advisories DEBIAN-CVE-2025-56226

  • libsndfile openSUSE Tumbleweed 1.2.2-4.1

opensuse advisories openSUSE-SU-2026:10061-1

  • libsndfile Azure Linux 3.0 1.2.2-4

azure linux advisories AZL-74855

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-56226 updated cvss 5.3

libsndfile: memory leak when encoding MP3 files due to an incomplete initialization

  • Red Hat Enterprise Linux 6 libsndfile
    affected: workaround, no fix planned “Do not process untrusted MP3 files with the libsndfile library.”
  • Red Hat Enterprise Linux 10 libsndfile
    affected: workaround, no fix available “Do not process untrusted MP3 files with the libsndfile library.”
  • Red Hat Enterprise Linux 7 libsndfile, libsndfile-utils Red Hat Enterprise Linux 8 libsndfile, libsndfile-utils Red Hat Enterprise Linux 9 libsndfile, libsndfile-utils
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
9 mo ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/libsndfile/libsndfile/issues/1089 referenced PoC, tagged "exploit" by a source, unverified
  • gist.github.com https://gist.github.com/Sisyphus-wang/f9e6e017b7d478bebee6e8187672abc8 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.