ggml-org llama.cpp llm_tokenizer_plamo2 build out-of-bounds write

Summaryinfo

A vulnerability has been found in ggml-org llama.cpp and classified as critical. Affected by this vulnerability is the function llm_tokenizer_plamo2::build of the component llm_tokenizer_plamo2. The manipulation leads to out-of-bounds write. This vulnerability is documented as CVE-2026-116816. The attack can be initiated remotely. There is not any exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in ggml-org llama.cpp (the affected version unknown). It has been rated as critical. This issue affects the function llm_tokenizer_plamo2::build of the component llm_tokenizer_plamo2. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

llama.cpp b5899 before b10261 contains a heap out-of-bounds write vulnerability in llm_tokenizer_plamo2::build that allows attackers to corrupt heap memory via crafted GGUF models. Attackers can supply BYTE-typed token text like <0x-1> whose negative parsed value writes token ids before the bytes_ buffer during model loading, causing crashes or potential code execution.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-116816 since 10/26/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit.

Applying the patch b10261 is able to eliminate this problem.

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Productinfo

Vendor

• ggml-org

Name

• llama.cpp

Website

• Product: https://github.com/ggml-org/llama.cpp/

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CPE 2.2info

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