CVE-2025-64505
libpng1.6 - security update
Description
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 function when processing PNG files with malformed palette indices. The vulnerability occurs when palette_lookup array bounds are not validated against externally-supplied image data, allowing an attacker to craft a PNG file with out-of-range palette indices that trigger out-of-bounds memory access. This issue has been patched in version 1.6.51.
How to fix CVE-2025-64505
To remediate CVE-2025-64505, upgrade the affected package to a fixed version below.
- —upgrade to 1.6.53-r0 or later
- —upgrade to 1.6.37-3+deb11u1 or later
- —upgrade to 1.6.37-3+deb11u1 or later
- —upgrade to 1.6.39-2+deb12u1 or later
Is CVE-2025-64505 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 1.6.53-r0
- from 0, < 1.6.37-3+deb11u1
- from 0, < 1.6.37-3+deb11u1
- from 0, < 1.6.39-2+deb12u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H |