Vulnerability Description
llama.cpp before b8585 contains a use-after-free vulnerability in the RPC server's GRAPH_RECOMPUTE handler that allows unauthenticated remote attackers to achieve arbitrary read and write access by storing a computation graph, freeing referenced buffers, and reclaiming freed memory with attacker-controlled content. Attackers can send RPC requests to trigger re-execution of stored graphs with dangling pointers, enabling full remote code execution without requiring authentication or user interaction.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/ggml-org/llama.cpp/commit/389c7d4955ba55c7418afaebf7c23d9ed64
- https://github.com/ggml-org/llama.cpp/pull/21175
- https://github.com/ggml-org/llama.cpp/releases/tag/b8585
- https://www.vulncheck.com/advisories/llama-cpp-use-after-free-in-rpc-graph-recom
FAQ
What is CVE-2026-39909?
CVE-2026-39909 is a vulnerability with a CVSS score of 8.1 (HIGH). llama.cpp before b8585 contains a use-after-free vulnerability in the RPC server's GRAPH_RECOMPUTE handler that allows unauthenticated remote attackers to achieve arbitrary read and write access by st...
How severe is CVE-2026-39909?
CVE-2026-39909 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-39909?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.