CVE-2026-53103
Description
In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7925: fix potential deadlock in mt7925_roc_abort_sync
roc_abort_sync() can deadlock with roc_work(). roc_work() holds
dev->mt76.mutex, while cancel_work_sync() waits for roc_work()
to finish. If the caller already owns the same mutex, both
sides block and no progress is possible.
This deadlock can occur during station removal when
mt76_sta_state() -> mt76_sta_remove() ->
mt7925_mac_sta_remove_link() -> mt7925_mac_link_sta_remove() ->
mt7925_roc_abort_sync() invokes cancel_work_sync() while
roc_work() is still running and holding dev->mt76.mutex.
This avoids the mutex deadlock and preserves exactly-once
work ownership.
Summary dbcve.org
A deadlock vulnerability exists in the Linux kernel's mt7925 WiFi driver where roc_abort_sync() can deadlock with roc_work(). roc_work() holds dev->mt76.mutex while cancel_work_sync() waits for roc_work() to finish. During station removal via mt76_sta_state() -> mt7925_roc_abort_sync(), if the caller already owns the same mutex, both sides block indefinitely.
Mitigation
Update the Linux kernel to a version containing the fix for this mutex deadlock, or apply the vendor-specific patch that resolves the roc_abort_sync/roc_work mutex contention issue.