CVE-2026-116829

llama.cpp b10398 before b11301 Integer Overflow in gguf_init_from_reader

Published Oct 27, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

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

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

ggml-org

llama.cpp

unaffected

Version	Status	Constraints
`b10398`	affected	< b11301
`0.1.0`	affected	< 0.6.0

No data.

Vendor Product Versions

Ggml

Llama.cpp

Version	Status	Scheme	Platform
`[b10398,b11301)`	affected	generic	—
`[0.1.0,0.6.0)`	affected	semver	—

Ggml-org

Llama.cpp

Version	Status	Scheme	Platform
`[b10398,b11301)`	affected	generic	—
`[0.1.0,0.6.0)`	affected	semver	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.126% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
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

History

Nov 2, 2026 8:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Oct 27, 2026 9:30 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Ggml-org Ggml-org llama.cpp
Vendors & Products		Ggml-org Ggml-org llama.cpp

Oct 27, 2026 4:30 AM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		llama.cpp b10398 before b11301 Integer Overflow in gguf_init_from_reader
First Time appeared		Ggml Ggml llama.cpp
Weaknesses		CWE-190
CPEs		cpe:2.3:a:ggml:llama.cpp::::::::
Vendors & Products		Ggml Ggml llama.cpp
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
Metrics		cvssV3_1 `{'score': 6.6, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H'}` cvssV4_0 `{'score': 6.9, 'vector': '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'}`