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

Status: published. Published: 2026-10-27. Updated: 2026-11-02.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/ggml-org/llama.cpp/pull/29384
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/ggml-org/llama.cpp/commit/2149c00f4442dc59302e134a02e4c99d5f7ed9fc

## Affected products and versions

- ggml-org / llama.cpp (ggml-org/llama.cpp): ≥ b10398; < b11301 (affected, custom); ≥ 0.1.0; < 0.6.0 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 6.6 (medium); CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.13% as of 2026-11-02; percentile 2.29%

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-190

## Exploit evidence

- exploit: https://github.com/ggml-org/llama.cpp/issues/29383 (ADP: CISA-ADP)

## References

- https://github.com/ggml-org/llama.cpp/issues/29383 (CNA: VulnCheck; issue-tracking)

- https://github.com/ggml-org/llama.cpp/pull/29384 (CNA: VulnCheck; patch, issue-tracking)

- https://github.com/ggml-org/llama.cpp/commit/2149c00f4442dc59302e134a02e4c99d5f7ed9fc (CNA: VulnCheck; patch)

- https://github.com/ggml-org/llama.cpp/blob/v0.5.0/ggml/src/gguf.cpp#L701 (CNA: VulnCheck; technical-description)

- https://github.com/ggml-org/llama.cpp/releases/tag/b11301 (CNA: VulnCheck; release-notes)

- https://www.vulncheck.com/advisories/llama-cpp-b10398-before-b11301-integer-overflow-in-gguf-init-from-reader (CNA: VulnCheck; third-party-advisory)

- https://github.com/ggml-org/llama.cpp/issues/29383 (ADP: CISA-ADP; exploit)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-116829; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-116829; retrieved 2026-11-02; source updated Not reported

Revision: ce3fc147623d091260b80a552dbf0b922bb4f4f5e6435ffafd4f8cc16054c806

Canonical: https://y2.dev/cve/CVE-2026-116829

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