Medium 5.5Published Oct 26, 2026

CVE-2025-71439llama.cpp before b5649 Heap Out-of-Bounds Read via llama_vocab::impl::print_info

Updated under an hour ago (Oct 29, 2026, 7:10 AM ET)

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It affects ggml-org llama.cpp. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for ggml-org llama.cpp

Exploited in the last 30 days

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.

CVSS: 5.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-125
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Oct 26, 2026
First seen by InfoSec Signals: Oct 26, 2026

Affected products

Affected products

ggml-org llama.cpp ggml_org:llama.cpp (from the name)	before b5649	CNA record

References

References

https://github.com/ggml-org/llama.cpp/security/advisories/GHSA-g4cc-763q-h9h6	vendor-advisory
https://github.com/ggml-org/llama.cpp/pull/14145	patch, issue-tracking
https://github.com/ggml-org/llama.cpp/commit/c33fe8b8c4427202706b1434e9fc8ab5752c9cac	patch
https://github.com/ggml-org/llama.cpp/blob/b5648/src/llama-vocab.cpp#L2771	technical-description
https://github.com/ggml-org/llama.cpp/releases/tag/b5649	release-notes
https://www.vulncheck.com/advisories/llama-cpp-before-b5649-heap-out-of-bounds-read-via-llama-vocab-impl-print-info	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.