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OpenAdvisories
High RHSA-2026:29902 1 CVE

Red Hat Security Advisory: libpng security update

Published Jun 26, 2026 · Updated Oct 16, 2026

Ecosystem: Red Hat

Fixed packages 12

ReleasePackageFixed in
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos libpng 2:1.6.34-8.el8_4.3
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos libpng-debuginfo 2:1.6.34-8.el8_4.3
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos libpng-debugsource 2:1.6.34-8.el8_4.3
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos libpng-devel 2:1.6.34-8.el8_4.3
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos libpng-devel-debuginfo 2:1.6.34-8.el8_4.3
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos libpng-tools-debuginfo 2:1.6.34-8.el8_4.3
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos libpng 2:1.6.34-8.el8_4.3
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos libpng-debuginfo 2:1.6.34-8.el8_4.3
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos libpng-debugsource 2:1.6.34-8.el8_4.3
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos libpng-devel 2:1.6.34-8.el8_4.3
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos libpng-devel-debuginfo 2:1.6.34-8.el8_4.3
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos libpng-tools-debuginfo 2:1.6.34-8.el8_4.3

Vulnerabilities 1

  • 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
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_29902.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