CVE-2026-53103
Received Received - Intake
Deadlock in Linux Kernel WiFi Driver mt76

Publication date: 2026-06-24

Last updated on: 2026-06-24

Assigner: kernel.org

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.
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Meta Information
Published
2026-06-24
Last Modified
2026-06-24
Generated
2026-06-25
AI Q&A
2026-06-24
EPSS Evaluated
N/A
NVD
CVE-2026-53103
EUVD
EUVD-2026-38971
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
linux_kernel linux_kernel *
linux linux_kernel *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Compliance Impact

The provided information does not include any details on how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

Executive Summary

This vulnerability is a potential deadlock in the Linux kernel's mt7925 WiFi driver. Specifically, the function roc_abort_sync() can deadlock with roc_work() because roc_work() holds a mutex (dev->mt76.mutex), and cancel_work_sync() waits for roc_work() to finish. If the caller already owns the same mutex, both sides block each other, causing a deadlock where no progress is possible.

This deadlock can occur during the removal of a WiFi station, when a sequence of function calls leads to mt7925_roc_abort_sync() invoking cancel_work_sync() while roc_work() is still running and holding the mutex.

The fix prevents this mutex deadlock and ensures that work ownership is preserved exactly once.

Impact Analysis

This vulnerability can cause the Linux kernel's WiFi driver to deadlock during station removal, which means the system could hang or become unresponsive in that context.

Such a deadlock could lead to degraded system performance, loss of network connectivity, or require a system reboot to recover.

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