CVE-2026-77118
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Out-of-bounds write in GraphicsMagick PCD decoder
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
GraphicsMagick
- Vendor
- GraphicsMagick Group
- Product
- GraphicsMagick
- Platforms
- Linux
- Windows
- macOS
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 1.0.0 | affected | semver | 1.3.48 | Unavailable | None listed |
graphicsmagick
- Vendor
- Debian
- Product
- graphicsmagick
- Platforms
- Unknown
- Default status
unaffected- Package
- graphicsmagick
- Package collection
- https://packages.debian.org
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0 | affected | deb | 1.4+really1.3.48-1 | Unavailable | None listed |
GraphicsMagick
- Vendor
- Fedora Project
- Product
- GraphicsMagick
- Platforms
- Unknown
- Default status
unaffected- Package
- GraphicsMagick
- Package collection
- https://dl.fedoraproject.org/pub/epel
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0 | affected | rpm | 1.3.48 | Unavailable | None listed |