llama.cpp — Vulnerability (CVE-2025-52566)
Date: 2025-06
Affected: ggml/llama.cpp
Attack vector: other
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2025-52566
CWE: CWE-119
CWE-195
CVSS: 8.6 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H)

llama.cpp is an inference of several LLM models in C/C++. Prior to version b5721, there is a signed vs. unsigned integer overflow in llama.cpp's tokenizer implementation (llama_vocab::tokenize) (src/llama-vocab.cpp:3036) resulting in unintended behavior in tokens copying size comparison. Allowing heap-overflowing llama.cpp inferencing engine with carefully manipulated text input during tokenization process. This issue has been patched in version b5721.


Mitigations:

Architectural layers (MAESTRO):