DEBIAN-CVE-2026-77118

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Source
https://security-tracker.debian.org/tracker/CVE-2026-77118
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77118.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-77118
Upstream
  • CVE-2026-77118
Published
2026-08-20T13:19:07Z
Modified
2026-09-10T08:47:32Z
Severity
  • 8.4 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:12 / graphicsmagick

Package

Name
graphicsmagick
Purl
pkg:deb/debian/graphicsmagick?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
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~exp1
1.4+really1.3.42-1.1
1.4+really1.3.43-1
1.4+really1.3.44-1
1.4+really1.3.45-1
1.4+really1.3.45+hg17689-1
1.4+really1.3.45+hg17692-1
1.4+really1.3.45+hg17696-1
1.4+really1.3.46-1
1.4+really1.3.46-2
1.4+really1.3.48-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77118.json"

Debian:13 / graphicsmagick

Package

Name
graphicsmagick
Purl
pkg:deb/debian/graphicsmagick?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
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

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77118.json"

Debian:14 / graphicsmagick

Package

Name
graphicsmagick
Purl
pkg:deb/debian/graphicsmagick?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.4+really1.3.48-1

Affected versions

1.*
1.4+really1.3.45+hg17696-1
1.4+really1.3.46-1
1.4+really1.3.46-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77118.json"