https://seclists.org/oss-sec/2026/q1/156 - libpng 1.6.55: Heap buffer overflow vulnerability fixed: CVE-2026-25646

CVE-2026-25646 has a high severity rating due to the heap buffer overflow vulnerability it poses.

To fix CVE-2026-25646, users should upgrade to libpng version 1.6.55 or later.

All versions of libpng prior to 1.6.55 are affected by CVE-2026-25646.

CVE-2026-25646 is a heap buffer overflow vulnerability found in the low-level API of libpng.

CVE-2026-25646 specifically affects the png_set_quantize function when called with no histogram.

Affected Software

1 affected component

libpng LIBPNG<1.6.55

1

CVE-2026-25646 has a high severity rating due to the heap buffer overflow vulnerability it poses.

2

To fix CVE-2026-25646, users should upgrade to libpng version 1.6.55 or later.

3

All versions of libpng prior to 1.6.55 are affected by CVE-2026-25646.

4

CVE-2026-25646 is a heap buffer overflow vulnerability found in the low-level API of libpng.

5

CVE-2026-25646 specifically affects the png_set_quantize function when called with no histogram.