CVE-2025-71439
llama.cpp before b5649 Heap Out-of-Bounds Read via llama_vocab::impl::print_info
- State
- Published
- Severity
- 6.8 Medium
- Published
- Oct 27, 2026
- Updated
- Oct 27, 2026
- Reserved
- Oct 27, 2026
Description
llama.cpp before b5649 contains a heap out-of-bounds read vulnerability in llama_vocab::impl::print_info() that allows attackers to crash model loading via oversized special token IDs. Attackers can supply a crafted GGUF model with a short tokenizer.ggml.tokens array, causing llama-cli or llama-server to read past id_to_token and crash.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
llama.cppggml-org |
|
References
- GitHub Security Advisory (GHSA-g4cc-763q-h9h6)vendor-advisory
- https://github.com/ggml-org/llama.cpp/pull/14145patchissue-tracking
- https://github.com/ggml-org/llama.cpp/commit/c33fe8b8c4427202706b1434e9fc8ab5752c9cacpatch
- https://github.com/ggml-org/llama.cpp/blob/b5648/src/llama-vocab.cpp#L2771technical-description
- llama.cpp b5649 Release Notesrelease-notes
- VulnCheck Advisory: llama.cpp before b5649 Heap Out-of-Bounds Read via llama_vocab::impl::print_infothird-party-advisory
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