CVE-2026-43249

A flaw was found in the Linux kernel's 9p/xen filesystem driver. A race condition can occur when the xenwatch thread and other back-end change notifications concurrently attempt to free the front-end state using the xen_9pfs_front_free function. This can lead to a double-free vulnerability, resulting in a general protection fault and causing a system crash. This issue primarily impacts system availability.