{"id":"CVE-2026-70659","published":"2026-11-05T16:17:48.047","lastModified":"2026-11-05T16:17:48.047","description":"stable-diffusion.cpp is a pure C/C++ library for running diffusion model (Stable Diffusion, Flux, Wan, Qwen Image, Z-Image, and more) inference. From master-742-1a13107 until master-763-4fcc6fe, IMatrixCollector::load_imatrix in src/runtime/imatrix.cpp reuses the values and counts vectors for entries with the same tensor name but resizes them only when they are empty. An untrusted .imatrix file can provide a small nval for the first entry and a larger nval for a second entry with the same name, causing the accumulation loop to write attacker-controlled floating-point and integer values beyond both heap buffers. Loading the file through the --imat-in conversion path can corrupt the heap or crash the process before a model is required. This issue is fixed in master-763-4fcc6fe.","cvssScore":7.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwes":["CWE-787","CWE-1284"],"vendors":[],"products":[],"references":[{"url":"https://github.com/leejet/stable-diffusion.cpp/commit/4fcc6fef10c6f686801c6e257b22cd6a3deb906b","tags":[]},{"url":"https://github.com/leejet/stable-diffusion.cpp/pull/1750","tags":[]},{"url":"https://github.com/leejet/stable-diffusion.cpp/releases/tag/master-763-4fcc6fe","tags":[]},{"url":"https://github.com/leejet/stable-diffusion.cpp/security/advisories/GHSA-6q7q-2v9c-x8m7","tags":[]}],"exploitRefs":[{"url":"https://github.com/leejet/stable-diffusion.cpp/commit/4fcc6fef10c6f686801c6e257b22cd6a3deb906b","tags":[]},{"url":"https://github.com/leejet/stable-diffusion.cpp/pull/1750","tags":[]},{"url":"https://github.com/leejet/stable-diffusion.cpp/releases/tag/master-763-4fcc6fe","tags":[]},{"url":"https://github.com/leejet/stable-diffusion.cpp/security/advisories/GHSA-6q7q-2v9c-x8m7","tags":[]}],"hasPoc":true,"ai":null}