llama.cpp GGUF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on affected installations of llama.cpp. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of GGUF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute arbitrary code in the context of the current process.
Additional Details
llama.cpp has issued an update to correct this vulnerability. More details can be found at:
https://github.com/ggml-org/llama.cpp/pull/31336
Disclosure Timeline
- 2026-10-28 - Vulnerability reported to vendor
- 2026-11-13 - Coordinated public release of advisory
- 2026-11-13 - Advisory Updated
Credit
lucasfutures
