CVE-2026-33298llama.cpp has a Heap Buffer Overflow via Integer Overflow in GGUF Tensor Parsing

Descripción

llama.cpp is an inference of several LLM models in C/C++. Prior to b7824, an integer overflow vulnerability in the `ggml_nbytes` function allows an attacker to bypass memory validation by crafting a GGUF file with specific tensor dimensions. This causes `ggml_nbytes` to return a significantly smaller size than required (e.g., 4MB instead of Exabytes), leading to a heap-based buffer overflow when the application subsequently processes the tensor. This vulnerability allows potential Remote Code Execution (RCE) via memory corruption. b7824 contains a fix.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://github.com/ggml-org/llama.cpp/security/advisories/GHSA-96jg-mvhq-q7q7 ExploitVendor Advisory
• https://github.com/ggml-org/llama.cpp/releases/tag/b7824 Release Notes