llama.cpp before b5649 contains a heap out-of-bounds read vulnerability in llama_vocab::impl::print_info() that allows
Source GCVE Database
Not known to be exploited · CVSS 6.8 Medium : upgrade to b5649 when convenient.
Data as of 27 Oct 2026, 04:17 UTC
- Patch
- Available – fixed in b5649
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 27 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade llama.cpp to b5649.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| ggml-orgllama.cpp | Affected
| Fixed in
|
GitHubllama.cpppkg:github/llama.cppOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Users should avoid loading untrusted or crafted GGUF model files that could trigger this vulnerability.
Description
A heap out-of-bounds read vulnerability exists in llama.cpp before commit b5649 within the function llama_vocab::impl::print_info(). This flaw allows attackers to crash the model loading process by supplying a specially crafted GGUF model with an undersized tokenizer.ggml.tokens array, causing out-of-bounds access and application crash.
References
- github.com/ggml-org/llama.cpp/security/advisories/GHSA-g4cc-763q-h9h6 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2025-71439 (opens in a new tab)
- github.com/ggml-org/llama.cpp/pull/14145 (opens in a new tab)
- github.com/ggml-org/llama.cpp/commit/c33fe8b8c4427202706b1434e9fc8ab5752c9cac (opens in a new tab)
- github.com/ggml-org/llama.cpp/blob/b5648/src/llama-vocab.cpp (opens in a new tab)
- github.com/ggml-org/llama.cpp/releases/tag/b5649 (opens in a new tab)
- vulncheck.com/advisories/llama-cpp-before-b5649-heap-out-of-bounds-read-via-llama-vocab-impl-print-info (opens in a new tab)