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.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

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 None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

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
b5854 affected < b11275
0.1.0 affected < 0.6.0

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Project Subscriptions

Vendors Products
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Llama.cpp Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/ggml-org/llama.cpp/blob/v0.5.0/ggml/src/gguf.cpp#L794-L795 cve-icon cve-icon
https://github.com/ggml-org/llama.cpp/commit/a6ea155d3d38b3f6f43d0c0dc29c2d592413ef44 cve-icon cve-icon
https://github.com/ggml-org/llama.cpp/issues/26978 cve-icon cve-icon
https://github.com/ggml-org/llama.cpp/pull/26979 cve-icon cve-icon
https://github.com/ggml-org/llama.cpp/releases/tag/b11275 cve-icon cve-icon
https://www.vulncheck.com/advisories/llama-cpp-b5854-before-b11275-integer-overflow-in-gguf-init-from-reader cve-icon cve-icon
History

Tue, 27 Oct 2026 04:30:00 +0000

Type Values Removed Values Added
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.
Title llama.cpp b5854 before b11275 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
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H'}

cvssV4_0

{'score': 6.9, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-27T00:33:59.834Z

Reserved: 2026-10-27T00:10:22.076Z

Link: CVE-2026-116840

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-27T01:19:07.217

Modified: 2026-10-27T01:19:07.217

Link: CVE-2026-116840

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-27T07:15:08Z

Weaknesses