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OpenAdvisories
High RHSA-2026:28233 2 CVEs

Red Hat Security Advisory: libpng security update

Published Jun 24, 2026 · Updated Oct 16, 2026

Ecosystem: Red Hat

Fixed packages 6

ReleasePackageFixed in
Red Hat · RHEL 10 enterprise_linux:10.2 libpng 2:1.6.40-11.el10_2.1
Red Hat · RHEL 10 enterprise_linux:10.2 libpng-debuginfo 2:1.6.40-11.el10_2.1
Red Hat · RHEL 10 enterprise_linux:10.2 libpng-debugsource 2:1.6.40-11.el10_2.1
Red Hat · RHEL 10 enterprise_linux:10.2 libpng-devel 2:1.6.40-11.el10_2.1
Red Hat · RHEL 10 enterprise_linux:10.2 libpng-devel-debuginfo 2:1.6.40-11.el10_2.1
Red Hat · RHEL 10 enterprise_linux:10.2 libpng-tools-debuginfo 2:1.6.40-11.el10_2.1

Vulnerabilities 2

  • High 7.6
    CVE-2026-33636

    LIBPNG has ARM NEON Palette Expansion Out-of-Bounds Read on AArch64

    LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. In versions 1.6.36 through 1.6.55, an out-of-bounds read and write exists in libpng's ARM/AArch64 Neon-optimized palett…

    pnggroup libpng fltk libpng1.6 Debian Ubuntu Azure Linux Alpine Wolfi
  • High 7.5
    CVE-2026-33416

    LIBPNG has use-after-free via pointer aliasing in `png_set_tRNS` and `png_set_PLTE`

    LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. In versions 1.2.1 through 1.6.55, `png_set_tRNS` and `png_set_PLTE` each alias a heap-allocated buffer between `png_str…

    pnggroup libpng openjpeg2 fltk Debian Ubuntu Azure Linux Alpine Wolfi

References

  • article
    https://access.redhat.com/security/updates/classification/#moderate
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2451805
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2451819
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_28233.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-33416
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-33416
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-33416
  • article
    https://github.com/pnggroup/libpng/commit/23019269764e35ed8458e517f1897bd3c54820eb
  • article
    https://github.com/pnggroup/libpng/commit/7ea9eea884a2328cc7fdcb3c0c00246a50d90667
  • article
    https://github.com/pnggroup/libpng/commit/a3a21443ed12bfa1ef46fa0d4fb2b74a0fa34a25
  • article
    https://github.com/pnggroup/libpng/commit/c1b0318b393c90679e6fa5bc1d329fd5d5012ec1
  • article
    https://github.com/pnggroup/libpng/pull/824
  • article
    https://github.com/pnggroup/libpng/security/advisories/GHSA-m4pc-p4q3-4c7j
  • report
    https://access.redhat.com/security/cve/CVE-2026-33636
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-33636
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-33636
  • article
    https://github.com/pnggroup/libpng/commit/7734cda20cf1236aef60f3bbd2267c97bbb40869
  • article
    https://github.com/pnggroup/libpng/commit/aba9f18eba870d14fb52c5ba5d73451349e339c3
  • article
    https://github.com/pnggroup/libpng/security/advisories/GHSA-wjr5-c57x-95m2