CVE-2026-116840
llama.cpp b5854 before b11275 Integer Overflow in gguf_init_from_reader
- State
- Published
- Severity
- 6.9 Medium
- Published
- Oct 27, 2026
- Updated
- Oct 27, 2026
- Reserved
- Oct 27, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.1 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H | VulnCheck |
Weaknesses
- CWE-190 Integer Overflow or Wraparound
Affected Products
| Product | Versions |
|---|---|
llama.cppggml-org |
|
References
- https://github.com/ggml-org/llama.cpp/issues/26978issue-tracking
- https://github.com/ggml-org/llama.cpp/pull/26979patchissue-tracking
- https://github.com/ggml-org/llama.cpp/commit/a6ea155d3d38b3f6f43d0c0dc29c2d592413ef44patch
- https://github.com/ggml-org/llama.cpp/blob/v0.5.0/ggml/src/gguf.cpp#L794-L795technical-description
- llama.cpp b11275 Release Notesrelease-notes
- VulnCheck Advisory: llama.cpp b5854 before b11275 Integer Overflow in gguf_init_from_readerthird-party-advisory
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