CVE-2026-98473

A flaw was found in the Linux kernel's s390 Virtual Function I/O Adjunct Processor (VFIO-AP) device driver. A local user with administrative privileges can trigger this issue by removing an AP queue from the host configuration while it remains assigned to an active virtual machine. Because the driver does not properly clean up device resources when the hardware is no longer available, pinned memory pages and interrupt registrations are leaked, and subsequent cleanup attempts may cause a double-free condition. This flaw can lead to memory exhaustion, kernel instability, or a Denial of Service (DoS).

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.