CVE-2025-65955: ImageMagick has a use-after-free/double-free risk in Options::fontFamily when clearing family

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-02 · updated 2026-06-23
Weakness: CWE-415

Description

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to 7.1.2-9 and 6.9.13-34, there is a vulnerability in ImageMagick’s Magick++ layer that manifests when Options::fontFamily is invoked with an empty string. Clearing a font family calls RelinquishMagickMemory on _drawInfo->font, freeing the font string but leaving _drawInfo->font pointing to freed memory while _drawInfo->family is set to that (now-invalid) pointer. Any later cleanup or reuse of _drawInfo->font re-frees or dereferences dangling memory. DestroyDrawInfo and other setters (Options::font, Image::font) assume _drawInfo->font remains valid, so destruction or subsequent updates trigger crashes or heap corruption. This vulnerability is fixed in 7.1.2-9 and 6.9.13-34.

Affected products

ImageMagick: before 6.9.13-34; from 7.0.0-0 before 7.1.2-9 — fixed in 6.9.13-34, 7.1.2-9

How to fix

Upgrade to a fixed version: ImageMagick 6.9.13-34, 7.1.2-9. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2025-65955 or the next vulnerability affects your stack