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Medium ELSA-2026-28255 2 CVEs

Moderate: libpng security update (Oracle Linux 9)

Published Jun 23, 2026 · Updated Jun 23, 2026

Ecosystem: Oracle Linux

Summary

[2:1.6.37-15.2]
- fix CVE-2026-33416: use-after-free via pointer aliasing in png_set_tRNS and png_set_PLTE (RHEL-161448)

[2:1.6.37-15.1]
- fix CVE-2026-33636: out-of-bounds R/W in the palette expansion on ARM Neon (RHEL-161299)

Fixed packages 2

ReleasePackageFixed in
Oracle Linux · 9 libpng 2:1.6.37-15.el9_8.2
Oracle Linux · 9 libpng-devel 2:1.6.37-15.el9_8.2

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