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 Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://github.com/ggml-org/llama.cpp/blob/v0.5.0/ggml/src/gguf.cpp#L794-L795
disclosure@vulncheck.com
https://github.com/ggml-org/llama.cpp/commit/a6ea155d3d38b3f6f43d0c0dc29c2d5924…
disclosure@vulncheck.com
https://github.com/ggml-org/llama.cpp/issues/26978
disclosure@vulncheck.com
https://github.com/ggml-org/llama.cpp/pull/26979
disclosure@vulncheck.com
https://github.com/ggml-org/llama.cpp/releases/tag/b11275
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/llama-cpp-b5854-before-b11275-integer-over…
disclosure@vulncheck.com