CVE-2025-71439
llama.cpp before b5649 Heap Out-of-Bounds Read via llama_vocab::impl::print_info
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-125 |
| Vendor | ggml-org |
| Product | llama.cpp |
| Published | Oct 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
ggml-org / llama.cpp
0 < b5649
References
github.com: https://github.com/ggml-org/llama.cpp/security/advisories/GHSA-g4cc-763q-h9h6 github.com: https://github.com/ggml-org/llama.cpp/pull/14145 github.com: https://github.com/ggml-org/llama.cpp/commit/c33fe8b8c4427202706b1434e9fc8ab5752c9cac github.com: https://github.com/ggml-org/llama.cpp/blob/b5648/src/llama-vocab.cpp#L2771 github.com: https://github.com/ggml-org/llama.cpp/releases/tag/b5649 vulncheck.com: https://www.vulncheck.com/advisories/llama-cpp-before-b5649-heap-out-of-bounds-read-via-llama-vocab-impl-print-info
Credits
Miaoqian Lin (Yuuoniy) 🔍 Jeongwoo Lee ggerganov