CVE-2026-25646
LIBPNG has a heap buffer overflow in png_set_quantize
HIGH 8.3
At a glance
- Source
- NVD
- EPSS
- EPSS 1.09 % · percentile 65 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Modified
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.
Weaknesses (CWE)
References
- https://github.com/pnggroup/libpng/security/advisories/GHSA-g8hp-mq4h-rqm3
- https://github.com/pnggroup/libpng/commit/01d03b8453eb30ade759cd45c707e5a1c7277d88
- http://www.openwall.com/lists/oss-security/2026/02/09/7
- https://access.redhat.com/security/cve/CVE-2026-25646
- https://bugzilla.redhat.com/show_bug.cgi?id=2438542
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25646.json
- https://access.redhat.com/errata/RHSA-2026:4756
- https://access.redhat.com/errata/RHSA-2026:7032
- https://access.redhat.com/errata/RHSA-2026:12274
- https://access.redhat.com/errata/RHSA-2026:7239
- https://access.redhat.com/errata/RHSA-2026:15087
- https://access.redhat.com/errata/RHSA-2026:14773
- https://access.redhat.com/errata/RHSA-2026:10097
- https://access.redhat.com/errata/RHSA-2026:17596
- https://access.redhat.com/errata/RHSA-2026:6553
- https://access.redhat.com/errata/RHSA-2026:7243
- https://access.redhat.com/errata/RHSA-2026:3577
- https://access.redhat.com/errata/RHSA-2026:3551
- https://access.redhat.com/errata/RHSA-2026:6445
- https://access.redhat.com/errata/RHSA-2026:6439
- https://access.redhat.com/errata/RHSA-2026:7035
- https://access.redhat.com/errata/RHSA-2026:6466
- https://access.redhat.com/errata/RHSA-2026:7036
- https://access.redhat.com/errata/RHSA-2026:6467
- https://access.redhat.com/errata/RHSA-2026:7033
- https://access.redhat.com/errata/RHSA-2026:6469
- https://access.redhat.com/errata/RHSA-2026:7034
- https://access.redhat.com/errata/RHSA-2026:6468
- https://access.redhat.com/errata/RHSA-2026:3573
- https://access.redhat.com/errata/RHSA-2026:4222
- https://access.redhat.com/errata/RHSA-2026:3575
- https://access.redhat.com/errata/RHSA-2026:4221
- https://access.redhat.com/errata/RHSA-2026:3574
- https://access.redhat.com/errata/RHSA-2026:3969
- https://access.redhat.com/errata/RHSA-2026:3576
- https://access.redhat.com/errata/RHSA-2026:3968
- https://access.redhat.com/errata/RHSA-2026:3405
- https://access.redhat.com/errata/RHSA-2026:3031
- https://access.redhat.com/errata/RHSA-2026:4728
- https://access.redhat.com/errata/RHSA-2026:4732
- https://access.redhat.com/errata/RHSA-2026:4731
- https://access.redhat.com/errata/RHSA-2026:4730
- https://access.redhat.com/errata/RHSA-2026:4729
- https://access.redhat.com/errata/RHSA-2026:4306
- https://access.redhat.com/errata/RHSA-2026:8748
- https://access.redhat.com/errata/RHSA-2026:8746
- https://access.redhat.com/errata/RHSA-2026:8747
- https://access.redhat.com/errata/RHSA-2026:16174
- https://access.redhat.com/errata/RHSA-2026:5606
- https://access.redhat.com/errata/RHSA-2026:4501
- +1 more
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | HIGH 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 | GitHub_M |
| CVSS 3.1 | HIGH 7.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H | redhat-SADP |
| CVSS 4.0 | HIGH 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 · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | HIGH 7.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
European references
- ENISA EUVD · EUVD-2026-7050
- GCVE · GCVE-0-2026-25646
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1378 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1206 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0492 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0339 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0218 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0209 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0199 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:libpng:libpng:*:*:*:*:*:*:*:*< 1.6.55
Affected products
| Product | Versions |
|---|---|
| pnggroup · libpng | affected < 1.6.55 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |