CVE-2026-70659 (GCVE-0-2026-70659)
Vulnerability from cvelistv5 – Published: 2026-11-05 15:26 – Updated: 2026-11-09 16:51
VLAI
EPSS
VEX
Title
stable-diffusion.cpp: Heap out-of-bounds write in the imatrix loader (`load_imatrix`) via a duplicate tensor name
Summary
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.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 16:12 UTC
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/leejet/stable-diffusion.cpp/se… | x_refsource_CONFIRM |
| https://github.com/leejet/stable-diffusion.cpp/pu… | x_refsource_MISC |
| https://github.com/leejet/stable-diffusion.cpp/co… | x_refsource_MISC |
| https://github.com/leejet/stable-diffusion.cpp/re… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| leejet | stable-diffusion.cpp |
Affected:
< master-763-4fcc6fe
|
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