Description
In ImageMagick 7.0.7-17 Q16, there is a heap-based buffer over-read in coders/sixel.c in the ReadSIXELImage function, related to the sixel_decode function.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | imagemagick | 8:6.9.9.34+dfsg-3 | — |
| Debian 13 | imagemagick | 8:6.9.9.34+dfsg-3 | — |
| Debian 12 | imagemagick | 8:6.9.9.34+dfsg-3 | — |
| Debian 9 | imagemagick | 8:6.9.7.4+dfsg-11+deb9u5 | DSA-4245-1 |
| Debian 8 | imagemagick | 8:6.8.9.9-5+deb8u12 | DSA-4204-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | imagemagick | 8:6.9.7.4+dfsg-16ubuntu6.2 | USN-3681-1 |
| Ubuntu 16.04 LTS | imagemagick | 8:6.8.9.9-7ubuntu5.11 | USN-3681-1 |
| Ubuntu 14.04 LTS | imagemagick | 8:6.7.7.10-6ubuntu3.11 | USN-3681-1 |
Advisories 3
- USN-3681-1 imagemagick vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4245-1 imagemagick - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4204-1 imagemagick - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- USN-3681-1 vendor-advisory
- https://github.com/ImageMagick/ImageMagick/issues/927
- 102431 vdb-entry
- DSA-4245 vendor-advisory
- DSA-4204 vendor-advisory