CVE-2026-80548

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A race condition exists in the s390/vfio ccw component. The io mutex was originally intended to serialize io regions but became associated with I/O operations due to their close relationship, leaving small windows for potential races. To resolve this, the scope of the io mutex was expanded to close these windows. Additionally, the cp free() function is now called via a workqueue element from fsm notoper(), as fsm notoper() may be invoked from an interrupt context where acquiring a mutex is not permitted.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.