libvips up to 8.18.2 Radiance RLE decoder radiance.c scanline_read_old heap-based overflow

Summaryinfo

A vulnerability categorized as problematic has been discovered in libvips up to 8.18.2. The impacted element is the function scanline_read_old of the file libvips/foreign/radiance.c of the component Radiance RLE decoder. Such manipulation leads to heap-based overflow. This vulnerability is traded as CVE-2026-70653. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in libvips up to 8.18.2. It has been rated as problematic. Affected by this issue is the function scanline_read_old of the file libvips/foreign/radiance.c of the component Radiance RLE decoder. 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. CVE summarizes:

libvips is a fast image processing library with low memory needs. Prior to version 8.18.3, the old-style Radiance RLE decoder in libvips/foreign/radiance.c can process a repeat marker at the beginning of a scanline in scanline_read_old and read q[-1] before any prior pixel exists. A crafted Radiance image loaded through VipsForeignLoadRad can therefore disclose four bytes of adjacent heap data, most likely other image data. This issue is fixed in version 8.18.3.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-70653 since 08/04/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

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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