What’s Vulnerable › Vulnerabilities

CVE-2026-116829: llama.cpp b10398 before b11301 Integer Overflow in gguf_init_from_reader

• Severity: medium (CVSS 6.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-27 · updated 2026-10-27
• Weakness: CWE-190

Description

llama.cpp b10398 before b11301 contains an integer overflow vulnerability in gguf_init_from_reader that allows attackers to bypass tensor element-count validation by supplying shapes whose product wraps to zero. Attackers can craft GGUF files with enormous tensor extents that overflow ggml_nbytes() and strides, causing out-of-bounds memory access when buffers are sized from wrapped byte counts.

Affected products

• ggml-org llama.cpp: from b10398 before b11301; from 0.1.0 before 0.6.0 — fixed in b11301, 0.6.0

How to fix

Upgrade to a fixed version: ggml-org llama.cpp b11301, 0.6.0. Check the vendor advisory for mitigations.

References

• https://github.com/ggml-org/llama.cpp/blob/v0.5.0/ggml/src/gguf.cpp#L701
• https://github.com/ggml-org/llama.cpp/commit/2149c00f4442dc59302e134a02e4c99d5f7ed9fc
• https://github.com/ggml-org/llama.cpp/issues/29383
• https://github.com/ggml-org/llama.cpp/pull/29384
• https://github.com/ggml-org/llama.cpp/releases/tag/b11301
• https://www.vulncheck.com/advisories/llama-cpp-b10398-before-b11301-integer-overflow-in-gguf-init-from-reader

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