Buffer overflow in Ggml-org Llama.cpp
CVE-2025-49847
llama.cpp is an inference of several LLM models in C/C++. Prior to version b5662, an attacker‐supplied GGUF model vocabulary can trigger a buffer overflow in llama.cpp’s vocabulary‐loading code. Specifically, the helper _try_copy in llama…
Vulnerability class: Buffer Overflow
EPSS: 0.006 (70.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Ggml-org Llama.cpp — versions < b5662
Weakness classification (CWE)
References
- https://github.com/ggml-org/llama.cpp/security/advisories/GHSA-8wwf-w4qm-gpqr (x_refsource_CONFIRM)
- https://github.com/ggml-org/llama.cpp/commit/3cfbbdb44e08fd19429fed6cc85b982a91f0efd5 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-49847?
- CVE-2025-49847 is a high-severity vulnerability in Ggml-org Llama.cpp, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2025-06-17.
- How severe is CVE-2025-49847?
- High severity. CVSS v3 base score is 8.8 out of 10.