What is CVE-2025-64505?

CVE-2025-64505 is a medium-severity vulnerability in Pnggroup Libpng, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2025-11-24.

How severe is CVE-2025-64505?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Out-of-bounds Read in Pnggroup Libpng

CVE-2025-64505

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to version 1.6.51, a heap buffer over-read vulnerability exists in libpng's png_do_quantize f…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (2.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.

Affected products

Pnggroup Libpng — versions < 1.6.51

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

https://github.com/pnggroup/libpng/security/advisories/GHSA-4952-h5wq-4m42 (x_refsource_CONFIRM)
https://github.com/pnggroup/libpng/pull/748 (x_refsource_MISC)
https://github.com/pnggroup/libpng/commit/6a528eb5fd0dd7f6de1c39d30de0e41473431c37 (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-64505?: CVE-2025-64505 is a medium-severity vulnerability in Pnggroup Libpng, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2025-11-24.
How severe is CVE-2025-64505?: Medium severity. CVSS v3 base score is 6.1 out of 10.