p PatchFirst

CVE-2026-77118

CVE-2026-77118 · Out-of-bounds write in GraphicsMagick PCD decoder

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input. A crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.

CVSS 8.4 · High · EPSS 0.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • graphicsmagick

    Versions
    • ≥ 1.0.0, < 1.3.48: Affected (semver)

    Update to 1.3.48

  • graphicsmagick

    Versions
    • ≥ 0, < 1.4+really1.3.48-1: Affected (deb)

    Update to 1.4+really1.3.48-1

  • graphicsmagick

    Versions
    • ≥ 0, < 1.3.48: Affected (rpm)

    Update to 1.3.48

  • graphicsmagick Debian:12

    Versions
    • 1.4+really1.3.40-4
    • 1.4+really1.3.40-4+deb12u1
    • 1.4+really1.3.41-1
    • 1.4+really1.3.42-1
    • 1.4+really1.3.42-1.1
    • 1.4+really1.3.42-1.1~exp1
    • 1.4+really1.3.43-1
    • 1.4+really1.3.44-1
    • 1.4+really1.3.45+hg17689-1
    • 1.4+really1.3.45+hg17692-1
    • 1.4+really1.3.45+hg17696-1
    • 1.4+really1.3.45-1
    • 1.4+really1.3.46-1
    • 1.4+really1.3.46-2
    • 1.4+really1.3.48-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • graphicsmagick Debian:13

    Versions
    • 1.4+really1.3.45+hg17696-1
    • 1.4+really1.3.46-1
    • 1.4+really1.3.46-2
    • 1.4+really1.3.48-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • graphicsmagick Debian:14

    Versions
    • 1.4+really1.3.45+hg17696-1
    • 1.4+really1.3.46-1
    • 1.4+really1.3.46-2
    Affected ranges
    • ECOSYSTEM: < 1.4+really1.3.48-1

    Update to 1.4+really1.3.48-1

  • graphicsmagick Ubuntu:Pro:14.04:LTS

    Versions
    • 1.3.16-1.1ubuntu2
    • 1.3.16-1.1ubuntu3
    • 1.3.18-1ubuntu3
    • 1.3.18-1ubuntu3.1
    • 1.3.18-1ubuntu3.1+esm1
    • 1.3.18-1ubuntu3.1+esm2
    • 1.3.18-1ubuntu3.1+esm3
    • 1.3.18-1ubuntu3.1+esm4
    • 1.3.18-1ubuntu3.1+esm5
    • 1.3.18-1ubuntu3.1+esm6
    • 1.3.18-1ubuntu3.1+esm7
    • 1.3.18-1ubuntu3.1+esm8
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • graphicsmagick Ubuntu:Pro:16.04:LTS

    Versions
    • 1.3.21-3
    • 1.3.23-1
    • 1.3.23-1build1
    • 1.3.23-1ubuntu0.1
    • 1.3.23-1ubuntu0.1+esm1
    • 1.3.23-1ubuntu0.2
    • 1.3.23-1ubuntu0.3
    • 1.3.23-1ubuntu0.4
    • 1.3.23-1ubuntu0.5
    • 1.3.23-1ubuntu0.6
    • 1.3.23-1ubuntu0.6+esm1
    • 1.3.23-1ubuntu0.6+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • graphicsmagick Ubuntu:Pro:18.04:LTS

    Versions
    • 1.3.26-15
    • 1.3.26-16
    • 1.3.26-19
    • 1.3.27-1
    • 1.3.27-2
    • 1.3.27-3
    • 1.3.28-1
    • 1.3.28-2
    • 1.3.28-2ubuntu0.1
    • 1.3.28-2ubuntu0.1+esm1
    • 1.3.28-2ubuntu0.2
    • 1.3.28-2ubuntu0.2+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • graphicsmagick Ubuntu:Pro:20.04:LTS

    Versions
    • 1.4+really1.3.33+hg16115-1
    • 1.4+really1.3.33+hg16115-1build1
    • 1.4+really1.3.33+hg16117-1
    • 1.4+really1.3.34-1
    • 1.4+really1.3.34-2
    • 1.4+really1.3.34+hg16181-1
    • 1.4+really1.3.35-1
    • 1.4+really1.3.35-1ubuntu0.1~esm1
    • 1.4+really1.3.35-1ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • graphicsmagick Ubuntu:Pro:22.04:LTS

    Versions
    • 1.4+really1.3.36+hg16481-2
    • 1.4+really1.3.37-1
    • 1.4+really1.3.37-1build1
    • 1.4+really1.3.37+hg16662-1ubuntu1
    • 1.4+really1.3.38-1
    • 1.4+really1.3.38-1ubuntu0.1
    • 1.4+really1.3.38-1ubuntu0.1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • graphicsmagick Ubuntu:Pro:24.04:LTS

    Versions
    • 1.4+really1.3.42-1
    • 1.4+really1.3.42-1build1
    • 1.4+really1.3.42-1.1build1
    • 1.4+really1.3.42-1.1build2
    • 1.4+really1.3.42-1.1build3
    • 1.4+really1.3.42-1.1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • graphicsmagick Ubuntu:26.04:LTS

    Versions
    • 1.4+really1.3.45+hg17696-1build1
    • 1.4+really1.3.46-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

Check your server →