CVE-2026-22801

MEDIUM

libpng 1.6.26-1.6.53 - Heap Buffer Over-read via Negative Row Stride

Title source: llm
STIX 2.1

Description

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.6.26 to 1.6.53, there is an integer truncation in the libpng simplified write API functions png_write_image_16bit and png_write_image_8bit causes heap buffer over-read when the caller provides a negative row stride (for bottom-up image layouts) or a stride exceeding 65535 bytes. The bug was introduced in libpng 1.6.26 (October 2016) by casts added to silence compiler warnings on 16-bit systems. This vulnerability is fixed in 1.6.54.

References (1)

Core 1
Core References

Scores

CVSS v3 6.8
EPSS 0.0011
EPSS Percentile 1.7%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-125 CWE-190
Status published
Products (1)
libpng/libpng 1.6.26 - 1.6.54
Published Jan 12, 2026
Tracked Since Feb 18, 2026