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CVE-2022-48760 is a synchronization flaw in the Linux kernel USB core. On SMP systems, concurrent execution of usb_kill_urb() and __usb_hcd_giveback_urb() lacks the memory ordering required between updates to a URB rejection state and reference/use count. The resulting store-buffering race can allow the teardown CPU to observe a stale use count while the completion CPU observes a stale rejection state. The completion path then omits the required wake-up, leaving the teardown operation indefinitely blocked. Equivalent access patterns affect usb_poison_urb() and the failure path of usb_hcd_submit_urb().
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Linux kernel USB core synchronization flaw that can cause a hang.
A Linux kernel USB core vulnerability that can cause a hang in usb_kill_urb; it was resolved by adding memory barriers.
A Linux kernel USB-core synchronization flaw (CWE-820) caused by missing memory barriers in a store-buffering pattern. It can leave processes indefinitely waiting in usb_kill_urb(), resulting in a denial-of-service/hang condition.
A Linux kernel USB core race condition caused by insufficient memory barriers in concurrent URB rejection and completion processing. Store-buffering reordering can leave usb_kill_urb() permanently waiting for a URB completion notification, resulting in a kernel-level hang/denial of service.
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