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Fencer Vulns
high 7.0

CVE-2026-25646 json

LIBPNG has a heap buffer overflow in png_set_quantize

published 2026-02-10 8 mo ago modified 2026-09-01 2 mo ago also EUVD-2026-7050 , JLSEC-2026-11 , RSEC-2026-1

cvss
7.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

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.

Patch / fix

  • julia libpng_jll 1.6.55+0
  • cran png 0.1-9
  • Red Hat Red Hat Enterprise Linux 10 2:1.6.40-8.el10_1.2
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 2:1.6.40-8.el10_0.2
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:1.2.50-10.el7_9.1, 2:1.5.13-8.el7_9.2
  • Red Hat Red Hat Enterprise Linux 8 0:1.2.57-6.el8_10, 0:1.5.30-8.el8_10, 0:1.6.34-2.el8_10, 2:1.6.34-10.el8_10
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:1.2.57-5.el8_2.1, 0:1.5.30-7.el8_2.1, 2:1.6.34-8.el8_2.2
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:1.2.57-5.el8_4.1, 0:1.5.30-7.el8_4.1, 2:1.6.34-8.el8_4.2
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:1.2.57-5.el8_4.1, 0:1.5.30-7.el8_4.1, 2:1.6.34-8.el8_4.2
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:1.2.57-5.el8_6.1, 0:1.5.30-7.el8_6.1, 2:1.6.34-8.el8_6.2
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:1.2.57-5.el8_6.1, 0:1.5.30-7.el8_6.1, 2:1.6.34-8.el8_6.2
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:1.2.57-5.el8_6.1, 0:1.5.30-7.el8_6.1, 2:1.6.34-8.el8_6.2
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:1.2.57-5.el8_8.1, 0:1.5.30-7.el8_8.1, 2:1.6.34-8.el8_8.2
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:1.2.57-5.el8_8.1, 0:1.5.30-7.el8_8.1, 2:1.6.34-8.el8_8.2
  • Red Hat Red Hat Enterprise Linux 9 0:1.5.30-14.el9_7.1, 2:1.6.37-12.el9_7.2
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:1.5.30-14.el9_0.1, 2:1.6.37-12.el9_0.2
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:1.5.30-14.el9_2.1, 2:1.6.37-12.el9_2.2
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:1.5.30-14.el9_4.1, 2:1.6.37-12.el9_4.2
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.5.30-14.el9_6.1, 2:1.6.37-12.el9_6.2
  • Red Hat Red Hat OpenShift Container Platform 4.12 412.86.202604281506-0
  • Red Hat Red Hat OpenShift Container Platform 4.13 413.92.202604080111-0
  • Red Hat Red Hat OpenShift Container Platform 4.14 414.92.202605060243-0
  • Red Hat Red Hat OpenShift Container Platform 4.15 415.92.202605060220-0
  • Red Hat Red Hat OpenShift Container Platform 4.16 416.94.202604211449-0
  • Red Hat Red Hat OpenShift Container Platform 4.17 417.94.202605112123-0
  • Red Hat Red Hat OpenShift Container Platform 4.18 418.94.202603261158-0
  • Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202604080618-0
  • Red Hat Red Hat AI Inference Server 3.3 1775680192, 1775680262, 1775749857, 1778244546
  • Red Hat Red Hat Ceph Storage 8 1774002867
  • Red Hat Red Hat Discovery 2 1773273070
  • libpng1.6 Debian 12 1.6.39-2+deb12u3
  • libpng1.6 Debian 13 1.6.48-1+deb13u3
  • libpng1.6 Debian 14 1.6.55-1

debian advisories DEBIAN-CVE-2026-25646

  • libpng1.6 Ubuntu 22.04 LTS 1.6.37-3ubuntu0.4
  • libpng1.6 Ubuntu 24.04 LTS 1.6.43-5ubuntu0.5
  • libpng1.6 Ubuntu 25.10 1.6.50-1ubuntu0.4
  • libpng1.6 Ubuntu 26.04 LTS 1.6.55-1
  • libpng Ubuntu Pro 14.04 LTS 1.2.50-1ubuntu2.14.04.3+esm1
  • libpng Ubuntu Pro 16.04 LTS 1.2.54-1ubuntu1.1+esm2
  • libpng1.6 Ubuntu Pro 16.04 LTS 1.6.20-2ubuntu0.1~esm3
  • libpng1.6 Ubuntu Pro 18.04 LTS 1.6.34-1ubuntu0.18.04.2+esm2

ubuntu advisories UBUNTU-CVE-2026-25646

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libpng hummingbird 1 1.6.56-1.1.hum1
  • libpng-tools hummingbird 1 1.6.56-1.1.hum1
  • libpng hummingbird 1 1.6.58-2.1.hum1
  • libpng-tools hummingbird 1 1.6.58-2.1.hum1
  • libpng hummingbird 1 1.6.56-1.hum1
  • libpng-tools hummingbird 1 1.6.56-1.hum1
  • libpng12 RHEL 8 1.2.57-6.el8_10
  • libpng15 RHEL 8 1.5.30-8.el8_10

red hat advisories RHSA-2026:7503RHSA-2026:80330RHSA-2026:6732RHSA-2026:7036RHSA-2026:7034RHSA-2026:7035

  • libpng16 Linux Micro 6.1 1.6.58-slfo.1.1_1.1
  • libpng16 Linux Micro 6.0 1.6.58-1.1
  • libpng16 Linux Micro 6.2 1.6.44-160000.5.1
  • libpng16 Linux Micro 6.1 1.6.43-slfo.1.1_3.1
  • libpng16 Linux Micro 6.0 1.6.43-3.1
  • libpng12 SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +9 more 1.2.57-150000.4.6.1
  • libpng16 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 +1 more 1.6.40-150600.3.12.1
  • libpng16 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +9 more 1.6.34-150000.3.19.1

suse advisories SUSE-SU-2026:23514-1SUSE-SU-2026:23063-1SUSE-SU-2026:3039-1SUSE-SU-2026:2878-1SUSE-SU-2026:20750-1SUSE-SU-2026:20530-1

  • libpng12 openSUSE Tumbleweed 1.2.59-6.1
  • libpng16 openSUSE Leap 16.0 1.6.44-160000.5.1
  • libpng16 openSUSE Tumbleweed 1.6.55-1.1

opensuse advisories openSUSE-SU-2026:11265-1openSUSE-SU-2026:20378-1openSUSE-SU-2026:10188-1

  • libpng15 AlmaLinux 8 1.5.30-8.el8_10
  • libpng12 AlmaLinux 8 1.2.57-6.el8_10
  • libpng AlmaLinux 8 2:1.6.34-10.el8_10
  • mingw32-libpng AlmaLinux 8 1.6.34-2.el8_10
  • mingw64-libpng AlmaLinux 8 1.6.34-2.el8_10
  • libpng AlmaLinux 10 2:1.6.40-8.el10_1.2
  • libpng AlmaLinux 9 2:1.6.37-12.el9_7.2
  • libpng15 AlmaLinux 9 1.5.30-14.el9_7.1

almalinux advisories ALSA-2026:6439ALSA-2026:6445ALSA-2026:4728ALSA-2026:4306ALSA-2026:3551ALSA-2026:3405

  • libpng15 Rocky Linux 8 1.5.30-8.el8_10
  • libpng12 Rocky Linux 8 1.2.57-6.el8_10
  • libpng Rocky Linux 8 2:1.6.34-10.el8_10
  • mingw-libpng Rocky Linux 8 1.6.34-2.el8_10
  • libpng Rocky Linux 10 2:1.6.40-8.el10_1.2
  • libpng Rocky Linux 9 2:1.6.37-12.el9_7.2
  • libpng15 Rocky Linux 9 1.5.30-14.el9_7.1

rocky linux advisories RLSA-2026:6439RLSA-2026:6445RLSA-2026:4728RLSA-2026:4306RLSA-2026:3551RLSA-2026:3405

  • libpng Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 1.6.55-r0

alpine advisories ALPINE-CVE-2026-25646

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libpng CBL-Mariner 2.0, Azure Linux 3.0 1.6.55-1

azure linux advisories AZL-77409AZL-77441

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-25646 updated cvss 7.0

libpng: LIBPNG has a heap buffer overflow in png_set_quantize

  • Red Hat Enterprise Linux 6 libpng Red Hat Enterprise Linux 9 thunderbird
    affected: workaround, no fix planned “Will not fix”
  • Red Hat OPENJDK ELS 11.0.31
    fixed: vendor fix RHSA-2026:9255
  • Red Hat AI Inference Server 3.3 rhaiis 1775680192, rhaiis 1775680262, rhaiis 1775749857, rhaiis 1778244546
    fixed: vendor fix RHSA-2026:8748
  • Red Hat Build of OpenJDK 8u492
    fixed: vendor fix RHSA-2026:9684
  • Red Hat Build of OpenJDK 17.0.9
    fixed: vendor fix RHSA-2026:9687
  • Red Hat Build of OpenJDK 21.0.11
    fixed: vendor fix RHSA-2026:9690
  • Red Hat Build of OpenJDK 25.0.2
    fixed: vendor fix RHBA-2026:6267
  • Red Hat Ceph Storage 8 rhceph 1774002867
    fixed: vendor fix RHSA-2026:5606
show 29 more
  • Red Hat Discovery 2 discovery 1773273070
    fixed: vendor fix RHSA-2026:4501
  • Red Hat Enterprise Linux AppStream (v. 8) libpng12 1.2.57-6.el8_10, libpng15 1.5.30-8.el8_10
    fixed: vendor fix RHSA-2026:6445
  • Red Hat Enterprise Linux AppStream (v. 9) libpng 1.6.37-12.el9_7.2, libpng15 1.5.30-14.el9_7.1
    fixed: vendor fix RHSA-2026:3405
  • Red Hat Enterprise Linux AppStream (v. 10) libpng 1.6.40-8.el10_1.2
    fixed: vendor fix RHSA-2026:3551
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) libpng12 1.2.57-5.el8_2.1, libpng15 1.5.30-7.el8_2.1
    fixed: vendor fix RHSA-2026:7035
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) libpng12 1.2.57-5.el8_4.1, libpng15 1.5.30-7.el8_4.1
    fixed: vendor fix RHSA-2026:7036
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) libpng12 1.2.57-5.el8_6.1, libpng15 1.5.30-7.el8_6.1 Red Hat Enterprise Linux AppStream E4S (v.8.6) libpng12 1.2.57-5.el8_6.1, libpng15 1.5.30-7.el8_6.1
    fixed: vendor fix RHSA-2026:7033
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) libpng12 1.2.57-5.el8_8.1, libpng15 1.5.30-7.el8_8.1
    fixed: vendor fix RHSA-2026:7034
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) libpng 1.6.37-12.el9_0.2, libpng15 1.5.30-14.el9_0.1
    fixed: vendor fix RHSA-2026:3573
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) libpng 1.6.37-12.el9_2.2, libpng15 1.5.30-14.el9_2.1
    fixed: vendor fix RHSA-2026:3575
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) libpng 1.6.40-8.el10_0.2
    fixed: vendor fix RHSA-2026:3577
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) libpng 1.6.37-12.el9_4.2, libpng15 1.5.30-14.el9_4.1
    fixed: vendor fix RHSA-2026:3574
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) libpng 1.6.37-12.el9_6.2, libpng15 1.5.30-14.el9_6.1
    fixed: vendor fix RHSA-2026:3576
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) libpng12 1.2.57-5.el8_4.1, libpng15 1.5.30-7.el8_4.1
    fixed: vendor fix RHSA-2026:7036
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) libpng12 1.2.57-5.el8_6.1, libpng15 1.5.30-7.el8_6.1
    fixed: vendor fix RHSA-2026:7033
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) libpng12 1.2.57-5.el8_8.1, libpng15 1.5.30-7.el8_8.1
    fixed: vendor fix RHSA-2026:7034
  • Red Hat Enterprise Linux BaseOS (v. 8) libpng 1.6.34-10.el8_10
    fixed: vendor fix RHSA-2026:4728
  • Red Hat Enterprise Linux BaseOS (v. 9) libpng 1.6.37-12.el9_7.2
    fixed: vendor fix RHSA-2026:3405
  • Red Hat Enterprise Linux BaseOS (v. 10) libpng 1.6.40-8.el10_1.2
    fixed: vendor fix RHSA-2026:3551
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) libpng 1.6.34-8.el8_2.2
    fixed: vendor fix RHSA-2026:4732
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) libpng 1.6.34-8.el8_4.2
    fixed: vendor fix RHSA-2026:4731
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) libpng 1.6.34-8.el8_6.2 Red Hat Enterprise Linux BaseOS E4S (v.8.6) libpng 1.6.34-8.el8_6.2
    fixed: vendor fix RHSA-2026:4730
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) libpng 1.6.34-8.el8_8.2
    fixed: vendor fix RHSA-2026:4729
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) libpng 1.6.37-12.el9_0.2
    fixed: vendor fix RHSA-2026:3573
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) libpng 1.6.37-12.el9_2.2
    fixed: vendor fix RHSA-2026:3575
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) libpng 1.6.40-8.el10_0.2
    fixed: vendor fix RHSA-2026:3577
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) libpng 1.6.37-12.el9_4.2
    fixed: vendor fix RHSA-2026:3574
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) libpng 1.6.37-12.el9_6.2
    fixed: vendor fix RHSA-2026:3576
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) libpng 1.6.34-8.el8_4.2
    fixed: vendor fix RHSA-2026:4731

14 more fixed, 16 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
8 mo ago

Exploit prediction

1.12% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/pnggroup/libpng/security/advisories/GHSA-g8hp-mq4h-rqm3 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 8.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
CISA ADP 3.1 7.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
CNA 4.0 8.3 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H
OSV 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
julia libpng_jll
<1.6.55+0
1.6.55+0
cran png
>=0.1-3, <0.1-9
0.1-9

Affected products

  • pnggroup libpng
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat OpenShift Container Platform 4.12
  • Red Hat Red Hat OpenShift Container Platform 4.13
  • Red Hat Red Hat OpenShift Container Platform 4.14
  • Red Hat Red Hat OpenShift Container Platform 4.15
  • Red Hat Red Hat OpenShift Container Platform 4.16
  • Red Hat Red Hat OpenShift Container Platform 4.17
  • Red Hat Red Hat OpenShift Container Platform 4.18
  • Red Hat Red Hat OpenShift Container Platform 4.19
  • Red Hat Red Hat AI Inference Server 3.3
  • Red Hat Red Hat Ceph Storage 8
  • Red Hat Red Hat Discovery 2
  • Red Hat Red Hat Hardened Images
  • Red Hat Red Hat build of OpenJDK 11 ELS
  • Red Hat Red Hat build of OpenJDK 17
  • Red Hat Red Hat build of OpenJDK 1.8
  • Red Hat Red Hat build of OpenJDK 21
  • Red Hat Red Hat build of OpenJDK 25
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.