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Medium ALSA-2026:18028 1 CVE

Moderate: libpng security update

Published May 18, 2026 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

The libpng packages contain a library of functions for creating and manipulating Portable Network Graphics (PNG) image format files.

Security Fix(es):

* libpng: libpng: Arbitrary code execution due to use-after-free vulnerability (CVE-2026-33416)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 2

ReleasePackageFixed in
AlmaLinux · 9 libpng 2:1.6.37-12.el9_7.4
AlmaLinux · 9 libpng-devel 2:1.6.37-12.el9_7.4

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

  • report
    https://access.redhat.com/security/cve/CVE-2026-33416
  • report
    https://bugzilla.redhat.com/2451805
  • advisory
    https://errata.almalinux.org/9/ALSA-2026-18028.html