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Advisories

llama.cpp b5899 before b10261 Heap Out-of-Bounds Write via plamo2 Tokenizer

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Severity
high
Date
Affecting

  • llama.cpp >= b5899, < b10261

CWE
  • CWE-129 Improper Validation of Array Index
CVSS
8.5
CVSS V4 Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
Pedro Cruz (g4nkd), Jeongwoo Lee, CISC
Description
llama.cpp b5899 before b10261 contains a heap out-of-bounds write vulnerability in llm_tokenizer_plamo2::build that allows attackers to corrupt heap memory via crafted GGUF models. Attackers can supply BYTE-typed token text like <0x-1> whose negative parsed value writes token ids before the bytes_ buffer during model loading, causing crashes or potential code execution.

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