CVE-2026-53097

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7996: fix use-after-free bugs in mt7996_mac_dump_work()

When the mt7996 pci chip is detaching, the mt7996_crash_data is

released in mt7996_coredump_unregister(). However, the work item

dump_work may still be running or pending, leading to UAF bugs

when the already freed crash_data is dereferenced again in

mt7996_mac_dump_work().

The race condition can occur as follows:

CPU 0 (removal path) | CPU 1 (workqueue)

mt7996_pci_remove() | mt7996_sys_recovery_set()

mt7996_unregister_device() | mt7996_reset()

mt7996_coredump_unregister() | queue_work()

vfree(dev->coredump.crash_data) | mt7996_mac_dump_work()

| crash_data-> // UAF

Fix this by ensuring dump_work is properly canceled before

the crash_data is deallocated. Add cancel_work_sync() in

mt7996_unregister_device() to synchronize with any pending

or executing dump work.