Heap-based buffer overflow in libpng - CVE-2026-25646

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Main Vulnerability Database Vulnerabilities #VU122489

Heap-based buffer overflow in libpng - CVE-2026-25646

Published: February 10, 2026


Vulnerability identifier: #VU122489
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-25646
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the png_set_quantize() API function. A remote attacker can pass specially crafted PNG image to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

libpng
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
Debian Linux
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Micro
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Ubuntu
Basesystem Module
openSUSE Leap
openEuler
Fedora
Communications Unified Assurance
LANTIME Operating System Firmware (LTOS)
Oracle Outside In Technology
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
libpng (Ubuntu package)
libpng12-0-debuginfo
libpng12-debugsource
libpng12-0
libpng12-devel
libpng12-compat-devel
libpng12-0-debuginfo-32bit
libpng12-0-32bit
libpng12 (Red Hat package)
libpng12-doc
libpng12
libpng12-compat-devel-32bit
libpng12-devel-32bit
libpng12-0-32bit-debuginfo
libpng15 (Red Hat package)
libpng15
libpng15-doc
libpng15-15-debuginfo
libpng15-15
libpng15-debugsource
libpng16-16
libpng16-16-debuginfo-32bit
libpng16-16-32bit
libpng16-compat-devel
libpng16-debugsource
libpng16-16-debuginfo
libpng16-devel
libpng1.6 (Ubuntu package)
mingw32-libpng
mingw64-libpng
mingw-libpng (Red Hat package)
libpng (Red Hat package)
libpng-static
libpng-devel
libpng
libpng16-16-32bit-debuginfo
libpng1.6 (Debian package)
libpng-doc
libpng-tools
libpng-debugsource
libpng-debuginfo
libpng-help
libpng16-devel-64bit
libpng16-tools
libpng16-tools-debuginfo
libpng16-devel-32bit
libpng16-compat-devel-32bit
libpng16-16-64bit
libpng16-compat-devel-64bit
libpng16-16-64bit-debuginfo
mingw-libpng
java-1.8.0-openjdk-demo
java-1.8.0-openjdk-javadoc
java-1.8.0-openjdk-javadoc-zip
java-1.8.0-openjdk
java-1.8.0-openjdk-src
java-1.8.0-openjdk-headless
java-1.8.0-openjdk-devel
java-1.8.0-openjdk-accessibility
firefox
Oracle Communications Policy Management
IBM Business Automation Workflow
Red Hat OpenShift Container Platform
Juniper Junos Space

How to mitigate CVE-2026-25646

Install updates from vendor's website.

libpng - update to 1.6.55
LANTIME Operating System Firmware (LTOS) - update to 7.10.009
IBM Business Automation Workflow - addressed in versions 24.0.0-IF009, 24.0.1-IF008, 25.0.0-IF005, 26.0.0.0
libpng (Ubuntu package) - addressed in versions 1.2.50-1ubuntu2.14.04.3+esm1, 1.2.54-1ubuntu1.1+esm2
libpng12-0-debuginfo - addressed in versions 1.2.50-20.9.1, 1.2.57-150000.4.6.1, 1.2.59-20.17.1
libpng12-debugsource - addressed in versions 1.2.50-20.9.1, 1.2.57-150000.4.6.1, 1.2.59-20.17.1
libpng12-0 - addressed in versions 1.2.50-20.9.1, 1.2.57-150000.4.6.1, 1.2.59-20.17.1
libpng12-devel - addressed in versions 1.2.50-20.9.1, 1.2.57-150000.4.6.1, 1.2.59-20.17.1
libpng12-compat-devel - addressed in versions 1.2.50-20.9.1, 1.2.57-150000.4.6.1, 1.2.59-20.17.1
libpng12-0-debuginfo-32bit - addressed in versions 1.2.50-20.9.1, 1.2.59-20.17.1
libpng12-0-32bit - addressed in versions 1.2.50-20.9.1, 1.2.57-150000.4.6.1, 1.2.59-20.17.1
libpng12 (Red Hat package) - addressed in versions 1.2.57-5.el8_4.1, 1.2.57-5.el8_8.1, 1.2.57-6.el8_10
libpng12-doc - update to 1.2.57-6.0.1
libpng12 - update to 1.2.57-6.0.1
libpng12 - addressed in versions 1.2.57-25.fc42, 1.2.57-25.fc43, 1.2.57-25.fc44, 1.2.57-25.fc45
libpng12-compat-devel-32bit - update to 1.2.57-150000.4.6.1
libpng12-devel-32bit - update to 1.2.57-150000.4.6.1
libpng12-0-32bit-debuginfo - update to 1.2.57-150000.4.6.1
libpng15 (Red Hat package) - addressed in versions 1.5.30-7.el8_2.1, 1.5.30-7.el8_4.1, 1.5.30-7.el8_6.1, 1.5.30-7.el8_8.1, 1.5.30-8.el8_10, 1.5.30-14.el9_0.1, 1.5.30-14.el9_2.1, 1.5.30-14.el9_4.1, 1.5.30-14.el9_7.1
libpng15 - update to 1.5.30-8.0.1
libpng15-doc - update to 1.5.30-8.0.1
libpng15-15-debuginfo - update to 1.5.30-10.16.1
libpng15-15 - update to 1.5.30-10.16.1
libpng15-debugsource - update to 1.5.30-10.16.1
libpng15 - addressed in versions 1.5.30-25.fc42, 1.5.30-25.fc43, 1.5.30-25.fc44, 1.5.30-25.fc45
libpng16-16 - addressed in versions 1.6.8-15.18.1, 1.6.34-150000.3.19.1, 1.6.40-150600.3.12.1, 1.6.58-1.1
libpng16-16-debuginfo-32bit - update to 1.6.8-15.18.1
libpng16-16-32bit - addressed in versions 1.6.8-15.18.1, 1.6.34-150000.3.19.1, 1.6.40-150600.3.12.1
libpng16-compat-devel - addressed in versions 1.6.8-15.18.1, 1.6.34-150000.3.19.1, 1.6.40-150600.3.12.1
libpng16-debugsource - addressed in versions 1.6.8-15.18.1, 1.6.34-150000.3.19.1, 1.6.40-150600.3.12.1, 1.6.58-1.1
libpng16-16-debuginfo - addressed in versions 1.6.8-15.18.1, 1.6.34-150000.3.19.1, 1.6.40-150600.3.12.1, 1.6.58-1.1
libpng16-devel - addressed in versions 1.6.8-15.18.1, 1.6.34-150000.3.19.1, 1.6.40-150600.3.12.1
libpng1.6 (Ubuntu package) - addressed in versions 1.6.20-2ubuntu0.1~esm3, 1.6.34-1ubuntu0.18.04.2+esm2, 1.6.37-2ubuntu0.1~esm2, 1.6.37-3ubuntu0.4, 1.6.43-5ubuntu0.5, 1.6.50-1ubuntu0.4
mingw32-libpng - update to 1.6.34-2
mingw64-libpng - update to 1.6.34-2
mingw-libpng (Red Hat package) - update to 1.6.34-2.el8_10
libpng (Red Hat package) - addressed in versions 1.6.34-8.el8_2.2, 1.6.34-8.el8_4.2, 1.6.34-8.el8_8.2, 1.6.34-10.el8_10, 1.6.37-12.el9_0.2, 1.6.37-12.el9_2.2, 1.6.37-12.el9_7.2, 1.6.40-8.el10_0.2, 1.6.40-8.el10_1.2
libpng-static - addressed in versions 1.6.34-10, 1.6.40-5
libpng-devel - addressed in versions 1.6.34-10, 1.6.40-5
libpng - addressed in versions 1.6.34-10, 1.6.40-5
libpng16-16-32bit-debuginfo - addressed in versions 1.6.34-150000.3.19.1, 1.6.40-150600.3.12.1
libpng1.6 (Debian package) - addressed in versions 1.6.39-2+deb12u3, 1.6.48-1+deb13u3
libpng-doc - update to 1.6.40-5
libpng-tools - update to 1.6.40-5
libpng-static - update to 1.6.40-7
libpng-devel - update to 1.6.40-7
libpng-debugsource - update to 1.6.40-7
libpng-debuginfo - update to 1.6.40-7
libpng - update to 1.6.40-7
libpng-tools - update to 1.6.40-7
libpng-help - update to 1.6.40-7
libpng16-devel-64bit - update to 1.6.40-150600.3.12.1
libpng16-tools - update to 1.6.40-150600.3.12.1
libpng16-tools-debuginfo - update to 1.6.40-150600.3.12.1
libpng16-devel-32bit - update to 1.6.40-150600.3.12.1
libpng16-compat-devel-32bit - update to 1.6.40-150600.3.12.1
libpng16-16-64bit - update to 1.6.40-150600.3.12.1
libpng16-compat-devel-64bit - update to 1.6.40-150600.3.12.1
libpng16-16-64bit-debuginfo - update to 1.6.40-150600.3.12.1
mingw-libpng - addressed in versions 1.6.55-1.fc42, 1.6.55-1.fc43
libpng - addressed in versions 1.6.55-1.fc42, 1.6.55-1.fc43, 1.6.56-1.fc42, 1.6.56-1.fc43, 1.6.56-1.fc44
java-1.8.0-openjdk-demo - update to 1.8.0.472.b08-4
java-1.8.0-openjdk-javadoc - update to 1.8.0.472.b08-4
java-1.8.0-openjdk-javadoc-zip - update to 1.8.0.472.b08-4
java-1.8.0-openjdk - update to 1.8.0.472.b08-4
java-1.8.0-openjdk-src - update to 1.8.0.472.b08-4
java-1.8.0-openjdk-headless - update to 1.8.0.472.b08-4
java-1.8.0-openjdk-devel - update to 1.8.0.472.b08-4
java-1.8.0-openjdk-accessibility - update to 1.8.0.472.b08-4
Red Hat OpenShift Container Platform - addressed in versions 4.13.65, 4.18.37, 4.19.28
Juniper Junos Space - update to 26.1R1 Patch V1
firefox - update to 140.9.0-1

External References

Related Security Bulletins