CVE-2026-43631

ggml-org · llama.cpp

A use-after-free and race condition vulnerability in llama.cpp allows potential remote code execution via the llama server component.

Executive summary

A high-severity memory corruption vulnerability in the llama.cpp server component poses a significant risk of remote code execution.

Vulnerability

This vulnerability consists of a use-after-free condition and a race condition during concurrent execution, which can be triggered by an unauthenticated attacker to manipulate shared resources.

Business impact

Successful exploitation of this vulnerability could lead to a total compromise of the affected server, resulting in unauthorized code execution. Given the CVSS score of 8.1, the potential for high impact on confidentiality, integrity, and availability necessitates immediate attention to prevent system takeover.

Remediation

Immediate Action: Monitor official repository releases and apply the latest security patches provided by ggml-org as soon as they become available.

Proactive Monitoring: Review server access logs for anomalous traffic patterns and monitor for unexpected process crashes that may indicate exploitation attempts.

Compensating Controls: Implement network segmentation to limit exposure of the llama server to untrusted networks and utilize an intrusion detection system to monitor for suspicious activity.

Exploitation status

Public Exploit Available: Unknown.

Analyst recommendation

Given the high-severity nature of this memory corruption flaw, administrators should prioritize updating the llama.cpp environment as soon as a fix is released. Until a patch is applied, ensure that the llama server is not exposed to the public internet to reduce the attack surface.