ImageMagick up to 6.9.13-27/7.1.2-1 on 32-bit bytes_per_line heap-based overflow

Summaryinfo

A vulnerability marked as critical has been reported in ImageMagick up to 6.9.13-27/7.1.2-1 on 32-bit. This issue affects the function bytes_per_line. The manipulation leads to heap-based overflow. This vulnerability is traded as CVE-2025-57803. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in ImageMagick up to 6.9.13-27/7.1.2-1 on 32-bit. It has been rated as critical. This issue affects the function bytes_per_line. 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. The summary by CVE is:

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-28 and 7.1.2-2 for ImageMagick's 32-bit build, a 32-bit integer overflow in the BMP encoder’s scanline-stride computation collapses bytes_per_line (stride) to a tiny value while the per-row writer still emits 3 × width bytes for 24-bpp images. The row base pointer advances using the (overflowed) stride, so the first row immediately writes past its slot and into adjacent heap memory with attacker-controlled bytes. This is a classic, powerful primitive for heap corruption in common auto-convert pipelines. This issue has been patched in versions 6.9.13-28 and 7.1.2-2.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2025-57803 since 08/20/2025. 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. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 264432 (SUSE SLED15 / SLES15 Security Update : ImageMagick (SUSE-SU-2025:03113-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.9.13-28 or 7.1.2-2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 2c55221f4d38193adcb51056c14cf238fbcc35d7 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (264432), EUVD (EUVD-2025-25837) and CERT Bund (WID-SEC-2025-1906). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Debian Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• IGEL OS
• SUSE openSUSE
• Open Source ImageMagick

Productinfo

Type

• Image Processing Software

Name

• ImageMagick

Version

• 6.9.13-27
• 7.1.2-1

License

• open-source

Website

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

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Entryinfo

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

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