ImageMagick up to 7.1.2-14 Image Parser coders/uhdr.c WriteUHDRImage heap-based overflow

Summaryinfo

A vulnerability was found in ImageMagick up to 7.1.2-14. It has been classified as critical. The affected element is the function WriteUHDRImage of the file coders/uhdr.c of the component Image Parser. This manipulation causes heap-based overflow. This vulnerability is registered as CVE-2026-25794. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in ImageMagick up to 7.1.2-14 and classified as critical. Affected by this vulnerability is the function WriteUHDRImage of the file coders/uhdr.c of the component Image Parser. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is 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(). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

ImageMagick is free and open-source software used for editing and manipulating digital images. `WriteUHDRImage` in `coders/uhdr.c` uses `int` arithmetic to compute the pixel buffer size. Prior to version 7.1.2-15, when image dimensions are large, the multiplication overflows 32-bit `int`, causing an undersized heap allocation followed by an out-of-bounds write. This can crash the process or potentially lead to an out of bounds heap write. Version 7.1.2-15 contains a patch.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-25794 since 02/05/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 299854 (Linux Distros Unpatched Vulnerability : CVE-2026-25794), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 7.1.2-15 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (299854) and CERT Bund (WID-SEC-2026-0484). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• Open Source ImageMagick

Productinfo

Type

• Image Processing Software

Name

• ImageMagick

Version

• 7.1.2-14

License

• open-source

Website

• Product: https://www.imagemagick.org/

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