{"id":"CVE-2026-116840","published":"2026-10-27T00:33:59Z","modified":"2026-10-27T14:14:10Z","title":"llama.cpp b5854 before b11275 Integer Overflow in gguf_init_from_reader","vendor":"ggml-org","product":"llama.cpp","tier":"tail","description":{"text":"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.","provenance":"source","from":"CVE.org"},"cvss":{"score":6.1,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00126,"percentile":0.02294,"provenance":"source"},"cwes":[{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"references":[{"url":"https://github.com/ggml-org/llama.cpp/issues/26978","tags":["issue-tracking"]},{"url":"https://github.com/ggml-org/llama.cpp/pull/26979","tags":["patch","issue-tracking"]},{"url":"https://github.com/ggml-org/llama.cpp/commit/a6ea155d3d38b3f6f43d0c0dc29c2d592413ef44","tags":["patch"]},{"url":"https://github.com/ggml-org/llama.cpp/blob/v0.5.0/ggml/src/gguf.cpp#L794-L795","tags":["technical-description"]},{"url":"https://github.com/ggml-org/llama.cpp/releases/tag/b11275","tags":["release-notes"]},{"url":"https://www.vulncheck.com/advisories/llama-cpp-b5854-before-b11275-integer-overflow-in-gguf-init-from-reader","tags":["third-party-advisory"]}],"priority":{"score":4.7,"factors":[{"name":"EPSS percentile","points":0.46},{"name":"CVSS severity","points":4.27}]},"vendorSlug":"ggml-org","affectedVersions":[{"vendor":"ggml-org","product":"llama.cpp","versions":[">= b5854, < b11275",">= 0.1.0, < 0.6.0"]}],"euvd":{"id":"EUVD-2026-110571","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-ggml-org-llama-cpp-cve-2025-53630","parents":[{"from":"CVE-2025-53630","to":"CVE-2026-116840","relation":"bypass","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"bypass","quote":"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.","from":"CVE.org","in":"CVE-2026-116840"}]}]}}