What is CVE-2025-56226?

CVE-2025-56226 is a medium-severity vulnerability in Libsndfile Project, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.3/10. Published 2026-01-14.

How severe is CVE-2025-56226?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Libsndfile Project

CVE-2025-56226

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 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.004 (27.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000

Affected products

Libsndfile Project

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

github.com/libsndfile/libsndfile/issues/1089 (Exploit, Issue Tracking)
gist.github.com/Sisyphus-wang/f9e6e017b7d478bebee6e8187672abc8 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-56226?: CVE-2025-56226 is a medium-severity vulnerability in Libsndfile Project, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.3/10. Published 2026-01-14.
How severe is CVE-2025-56226?: Medium severity. CVSS v3 base score is 5.3 out of 10.