CVE-2026-70654

Description

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.

References

• https://github.com/libvips/libvips/commit/80e021c6cdda0f80b756c2109d99839c94c03258
• https://github.com/libvips/libvips/pull/5038
• https://github.com/libvips/libvips/releases/tag/v8.18.3
• https://github.com/libvips/libvips/security/advisories/GHSA-rjmm-3qch-m9rg