Medium 6.1Published Oct 26, 2026

CVE-2026-116840llama.cpp b5854 before b11275 Integer Overflow in gguf_init_from_reader

Updated under an hour ago (Oct 28, 2026, 10:40 AM ET)

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Every CVE for ggml-org llama.cpp

Exploited in the last 30 days

llama.cpp b5854 before b11275 contains an integer overflow vulnerability in gguf_init_from_reader that bypasses the CVE-2025-53630 size check when padding near-SIZE_MAX tensor sizes. Attackers can supply a crafted GGUF file whose tensor size pads to zero, causing an undersized data blob and out-of-bounds reads by consumers.

CVSS: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness (CWE): CWE-190
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 27, 2026
First seen by InfoSec Signals: Oct 26, 2026

Affected products

Affected products

ggml-org llama.cpp ggml_org:llama.cpp (from the name)	from b5854 before b11275; from 0.1.0 before 0.6.0	CNA record

References

References

https://github.com/ggml-org/llama.cpp/issues/26978	issue-tracking
https://github.com/ggml-org/llama.cpp/pull/26979	patch, issue-tracking
https://github.com/ggml-org/llama.cpp/commit/a6ea155d3d38b3f6f43d0c0dc29c2d592413ef44	patch
https://github.com/ggml-org/llama.cpp/blob/v0.5.0/ggml/src/gguf.cpp#L794-L795	technical-description
https://github.com/ggml-org/llama.cpp/releases/tag/b11275	release-notes
https://www.vulncheck.com/advisories/llama-cpp-b5854-before-b11275-integer-overflow-in-gguf-init-from-reader	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.