libvips up to 8.18.2 ImageMagick magick6load.c heap-based overflow

Summaryinfo

A vulnerability, which was classified as critical, was found in libvips up to 8.18.2. Affected by this issue is some unknown functionality of the file libvips/foreign/magick6load.c of the component ImageMagick. Such manipulation leads to heap-based overflow. This vulnerability is listed as CVE-2026-70651. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in libvips up to 8.18.2. Affected by this issue is some unknown functionality of the file libvips/foreign/magick6load.c of the component ImageMagick. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. CVE summarizes:

libvips is a fast image processing library with low memory needs. Prior to version 8.18.3, libvips built without libtiff support but with ImageMagick support can overflow the combined frame height while loading a crafted multi-page TIFF through VipsForeignLoadMagick. The vulnerable calculations in libvips/foreign/magick6load.c and libvips/foreign/magick7load.c multiply the per-page Ysize by n_frames without a checked bound, which can cause a heap buffer over-read and process crash. Most package-manager builds include libtiff and do not use this affected fallback path. This issue is fixed in version 8.18.3.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-70651 since 08/04/2026. The exploitation is known to be easy. The attack may be launched remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 8.18.3 eliminates this vulnerability.

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Productinfo

Name

• libvips

Version

• 8.18.0
• 8.18.1
• 8.18.2

Website

• Product: https://github.com/libvips/libvips/

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