libvips up to 8.18.2 PPM Image libvips/iofuncs/source.c vips_source_read_to_memory buffer overflow

Summaryinfo

A vulnerability identified as critical has been detected in libvips up to 8.18.2. This affects the function vips_source_read_to_memory of the file libvips/iofuncs/source.c of the component PPM Image Handler. Performing a manipulation results in buffer overflow. This vulnerability is known as CVE-2026-70654. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in libvips up to 8.18.2. This affects the function vips_source_read_to_memory of the file libvips/iofuncs/source.c of the component PPM Image Handler. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

libvips is a fast image processing library with low memory needs. Prior to version 8.18.3, applications that define unusual custom libvips sources and use them to process untrusted uncompressed PPM images can trigger a max/min error in vips_source_read_to_memory in libvips/iofuncs/source.c. The function uses VIPS_MAX instead of VIPS_MIN when selecting the remaining read size, allowing up to 4032 bytes to be written beyond the allocated heap buffer and causing memory corruption or a process crash. This issue is fixed in version 8.18.3.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-70654 since 08/04/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, 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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CPE 2.2info

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