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CVE-2026-25646

LIBPNG has a heap buffer overflow in png_set_quantize

Published: Feb 10, 2026Updated: Feb 13, 2026 Sources: CVE List NVD BDUCWE-122
NVD MITRE
8.1CVSSHIGH
EPSS Score
0.9%
Top 44.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.55, an out-of-bounds read vulnerability exists in the png_set_quantize() API function. When the function is called with no histogram and the number of colors in the palette is more than twice the maximum supported by the user's display, certain palettes will cause the function to enter into an infinite loop that reads past the end of an internal heap-allocated buffer. The images that trigger this vulnerability are valid per the PNG specification. This vulnerability is fixed in 1.6.55.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-122CWE-126

Affected Products

libpngpnggroup
Library
OSS Libraries / generic-library
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
АЛЬТ СП 10АО «ИВК»
On-premOS
Operating Systems / linux-distro
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
libpngGuy Eric Schalnat Andreas Dilger Glenn Randers-Pehrson
Library
OSS Libraries / generic-library
pnggrouposs-projectOSS Librariesaka libpng
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
ао «ивк»commercialRUOperating Systemsaka ivk
ооо «ред софт»commercialRUOperating Systemsaka red soft
guy eric schalnat andreas dilger glenn randers-pehrsonoss-projectOSS Librariesaka libpng
and 2 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://github.com/pnggroup/libpng/security/advisories/GHSA-g8hp-mq4h-rqm3
github.com
https://github.com/pnggroup/libpng/commit/01d03b8453eb30ade759cd45c707e5a1c7277d88
github.com
https://github.com/pnggroup/libpng/commit/01d03b8453eb30ade759cd45c707e5a1c7277d88
github.com
and 5 more references View all →

Timeline

Published
Feb 10, 2026
Last Updated
Feb 13, 2026

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