A use-after-free vulnerability in the Linux kernel dma-buf subsystem allows local attackers to achieve complete system compromise.

This is a use-after-free vulnerability within the dma_buf_fd tracepoint mechanism, where a racing thread closes a file descriptor before the tracepoint executes. The attacker requires local access with low privileges and no user interaction.

A successful exploitation of this flaw can lead to complete confidentiality, integrity, and availability loss of the affected system. Given the CVSS score of 7.8, the risk is classified as high, threatening underlying host stability and permitting local privilege escalation or arbitrary code execution in kernel space.

Immediate Action: Update the Linux kernel to version 7.0.12 or later, or apply the official fix commits b569f86e2f8dbf6f11d31d3de794d22e18098b23 and ead6680f354f83966c796fc7f9463a3171789616.

Proactive Monitoring: Monitor system logs for kernel panics, segmentation faults, or unexpected reboots that may indicate memory corruption attempts.

Compensating Controls: Restrict unprivileged local shell access and user account creation to minimize the exposure window for local attack vectors.

Public Exploit Available: No

Administrators must treat this high-severity kernel vulnerability with urgency by applying the patched kernel releases promptly. Because the flaw resides in core memory management code, mitigating local attack surfaces and updating the software stack prevents potential system instability and unauthorized privilege escalation.