CVE-2026-53101: wifi: mt76: mt7921: fix potential deadlock in mt7921_roc_abort_sync

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-24 · updated 2026-07-21
Weakness: CWE-667

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7921: fix potential deadlock in mt7921_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() -> mt7921_mac_sta_remove() -> mt7921_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.

Affected products

Linux kernel: from 6.9 before 6.12.95; from 6.13 before 6.18.33; from 6.19 before 7.0.10 — fixed in 6.12.95, 6.18.33, 7.0.10

How to fix

Upgrade to a fixed version: Linux kernel 6.12.95, 6.18.33, 7.0.10. Check the vendor advisory for mitigations.

References

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