CVE-2026-33298

llama.cpp has a Heap Buffer Overflow via Integer Overflow in GGUF Tensor Parsing

State
Published
Severity
7.8 High
Published
Mar 24, 2026
Updated
Mar 25, 2026
Reserved
Mar 18, 2026

Read the record on cve.org

Description

llama.cpp is an inference of several LLM models in C/C++. Prior to b7824, an integer overflow vulnerability in the `ggml_nbytes` function allows an attacker to bypass memory validation by crafting a GGUF file with specific tensor dimensions. This causes `ggml_nbytes` to return a significantly smaller size than required (e.g., 4MB instead of Exabytes), leading to a heap-based buffer overflow when the application subsequently processes the tensor. This vulnerability allows potential Remote Code Execution (RCE) via memory corruption. b7824 contains a fix.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HGitHub_M

Weaknesses

  • CWE-122 Heap-based Buffer Overflow
  • CWE-190 Integer Overflow or Wraparound

Affected Products

ProductVersions
llama.cppggml-org
  • < b7824Affected

References

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