MEDIUM

CVE-2026-22801

LIBPNG has an integer truncation causing heap buffer over-read in png_image_write_*

CVSS v3

6.8

MEDIUM

EPSS Score

0.1 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

none

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

libpngAlmaLinux:10all versions · fixed in 2:1.6.40-8.el10_1.2and 1 other package
libpngAlmaLinux:9all versions · fixed in 2:1.6.37-12.el9_7.2and 1 other package
libpngAlmaLinux:8all versions · fixed in 2:1.6.34-10.el8_10and 1 other package
mingw32-libpngAlmaLinux:8all versions · fixed in 1.6.34-2.el8_10and 3 other packages

Vendor advisories

CVE-2026-22801 Red Hat Product Security3,311 products fixed · 61 known affected
libpng: libpng: Information disclosure and denial of service via integer truncation in simplified write API
java-1.8.0-openjdk-portable.src as a component of Red Hat build of OpenJDK 1.8 · java-17-openjdk-portable.src as a component of Red Hat build of OpenJDK 17 · java-21-openjdk-portable.src as a component of Red Hat build of OpenJDK 21
RHSA-2026:80330 Red Hat Product Security13 products fixed
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
RHSA-2026:16174 Red Hat Product Security3 products fixed
Red Hat Security Advisory: Red Hat AI Inference Server 3.3.3 (Spyre)
RHSA-2026:12274 Red Hat Product Security1 product fixed
Red Hat Security Advisory: OpenShift Container Platform 4.12.88 bug fix and security update
RHSA-2026:9689 Red Hat Product Security834 products fixed
Red Hat Security Advisory: java-21-openjdk security update
RHSA-2026:9683 Red Hat Product Security780 products fixed
Red Hat Security Advisory: java-1.8.0-openjdk security update

23 more advisories

Full record on NVD

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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Published: 2026-01-12
Last Modified: 2026-01-21

Frequently asked questions

What is CVE-2026-22801?

Is CVE-2026-22801 actively exploited?

Active exploitation of CVE-2026-22801 has not been confirmed. Its EPSS score was 0.1% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-22801?

CVE-2026-22801 has a CVSS v3 base score of 6.8 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.

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