ImageMagick up to 6.9.13-39/7.1.2-14 SIXEL Decoder integer overflow

Summaryinfo

A vulnerability identified as problematic has been detected in ImageMagick up to 6.9.13-39/7.1.2-14. Affected by this issue is some unknown functionality of the component SIXEL Decoder. The manipulation leads to integer overflow. This vulnerability is uniquely identified as CVE-2026-25970. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in ImageMagick up to 6.9.13-39/7.1.2-14. This issue affects some unknown functionality of the component SIXEL Decoder. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is availability. The summary by CVE is:

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, a signed integer overflow vulnerability in ImageMagick's SIXEL decoder allows an attacker to trigger memory corruption and denial of service when processing a maliciously crafted SIXEL image file. The vulnerability occurs during buffer reallocation operations where pointer arithmetic using signed 32-bit integers overflows. Versions 7.1.2-15 and 6.9.13-40 contain a patch.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-25970 since 02/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 300033 (Linux Distros Unpatched Vulnerability : CVE-2026-25970), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.9.13-40 or 7.1.2-15 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (300033), EUVD (EUVD-2026-7429) and CERT Bund (WID-SEC-2026-0484). Be aware that VulDB is the high quality source for vulnerability data.

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

• 6.9.13-39
• 7.1.2-14

License

• open-source

Website

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

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Be aware that VulDB is the high quality source for vulnerability data.

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