llama.cpp b2877 before b11935 ggml-rpc Server DoS via Oversized recv_msg Length

Advisories

llama.cpp b2877 before b11935 ggml-rpc Server DoS via Oversized recv_msg Length

Severity: high
Date: 10/29/2026
Affecting: llama.cpp >= b2877, < b11935
CVE: CVE-2026-119052
CWE: CWE-248 Uncaught Exception
CVSS: 8.7
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References: https://github.com/ggml-org/llama.cpp/pull/31204
Patch Commit
https://github.com/ggml-org/llama.cpp
llama.cpp b11935 Release Notes
https://github.com/ggml-org/llama.cpp/blob/8542e94350f0ade01644db6f1d1520da3814dafd/ggml/src/ggml-rpc/ggml-rpc.cpp#L344-L356
Credit: Sohaib Harraoui (Ostorlab), Sohaib Harraoui (Ostorlab)
Description: llama.cpp b2877 before b11935 contains an uncaught exception vulnerability in the ggml-rpc server that allows unauthenticated remote attackers to crash the rpc-server by sending oversized message lengths. After the HELLO handshake, attackers can send a command such as SET_TENSOR with a length above std::vector::max_size(), triggering an uncaught std::length_error that aborts the process and denies service to all clients.

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