CVE-2026-25646
LIBPNG has a heap buffer overflow in png_set_quantize
02 Description
LIBPNG has a heap buffer overflow in png_set_quantize
03 Exploitation and scoring
- Exploitation
- Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
- SSVC decision
- ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 1.09% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 65.3% of scored records. A rank, not a probability.
- NVD base score
- 8.3 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- 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 analysis status
- Modified. NVD last modified this record on 2026-08-11.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-02-10 17:04Z8 MO AGO
- Last updated
- 2026-09-01 12:04Z1 MO AGO
- Reserved
- 2026-02-04
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.3)
- CNA CVSS vector
- 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
- Weaknesses
- Data version
- 5.2
- Document digest
- 16f2854e258f60e768ce66d9479e6bc099a4a70ae08cb377b1370ca30a063158
05 Affected products
06 References
- github.comhttps://github.com/pnggroup/libpng/security/advisories/GHSA-g8hp-mq4h-rqm3
- github.comhttps://github.com/pnggroup/libpng/commit/01d03b8453eb30ade759cd45c707e5a1c7277d88
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/02/09/7
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-25646
- bugzilla.redhat.comRHBZ#2438542https://bugzilla.redhat.com/show_bug.cgi?id=2438542
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25646.json
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4756
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7032
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:12274
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7239
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:15087
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:14773
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:10097
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:17596
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:6553
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7243
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3577
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3551
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:6445
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:6439
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7035
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:6466
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7036
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:6467
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7033
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:6469
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:7034
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:6468
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3573
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4222
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3575
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4221
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3574
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3969
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3576
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3968
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3405
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3031
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4728
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4732
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4731
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4730
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4729
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4306
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:8748
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:8746
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:8747
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:16174
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:5606
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4501
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:6732
07 Fixed in
AlmaLinux 8
- libpng Fixed in 2:1.6.34-10.el8_10
- libpng-devel Fixed in 2:1.6.34-10.el8_10
- libpng12 Fixed in 1.2.57-6.el8_10
- libpng15 Fixed in 1.5.30-8.el8_10
- mingw32-libpng Fixed in 1.6.34-2.el8_10
- mingw32-libpng-static Fixed in 1.6.34-2.el8_10
- mingw64-libpng Fixed in 1.6.34-2.el8_10
- mingw64-libpng-static Fixed in 1.6.34-2.el8_10
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- libpng Fixed in 2:1.6.37-12.el9_7.2
- libpng-devel Fixed in 2:1.6.37-12.el9_7.2
- libpng15 Fixed in 1.5.30-14.el9_7.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 10
- libpng Fixed in 2:1.6.40-8.el10_1.2
- libpng-devel Fixed in 2:1.6.40-8.el10_1.2
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- libpng Fixed in 2:1.6.34-10.el8_10
- libpng-devel Fixed in 2:1.6.34-10.el8_10
- libpng12 Fixed in 1.2.57-6.el8_10
- libpng15 Fixed in 1.5.30-8.el8_10
- mingw32-libpng Fixed in 1.6.34-2.el8_10
- mingw32-libpng-static Fixed in 1.6.34-2.el8_10
- mingw64-libpng Fixed in 1.6.34-2.el8_10
- mingw64-libpng-static Fixed in 1.6.34-2.el8_10
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- libpng Fixed in 2:1.6.37-12.el9_7.2
- libpng-devel Fixed in 2:1.6.37-12.el9_7.2
- libpng15 Fixed in 1.5.30-14.el9_7.1
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 10
- libpng Fixed in 2:1.6.40-8.el10_1.2
- libpng-devel Fixed in 2:1.6.40-8.el10_1.2
Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- libpng1.6 Fixed in 1.6.39-2+deb12u3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libpng1.6 Fixed in 1.6.48-1+deb13u3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libpng1.6 Fixed in 1.6.55-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- libpng1.6 Fixed in 1.6.37-3ubuntu0.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- libpng1.6 Fixed in 1.6.43-5ubuntu0.5
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- libpng1.6 Fixed in 1.6.50-1ubuntu0.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- libpng1.6 Fixed in 1.6.55-1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- libpng Fixed in 1.2.50-1ubuntu2.14.04.3+esm1Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- libpng Fixed in 1.2.54-1ubuntu1.1+esm2Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
- libpng1.6 Fixed in 1.6.20-2ubuntu0.1~esm3Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- libpng1.6 Fixed in 1.6.34-1ubuntu0.18.04.2+esm2Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- libpng1.6 Fixed in 1.6.37-2ubuntu0.1~esm2Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.