What’s Vulnerable › Vulnerabilities

CVE-2026-53100: wifi: mt76: fix deadlock in remain-on-channel

• 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: fix deadlock in remain-on-channel mt76_remain_on_channel() and mt76_roc_complete() call mt76_set_channel() while already holding dev->mutex. Since mt76_set_channel() also acquires dev->mutex, this results in a deadlock. Use __mt76_set_channel() instead of mt76_set_channel(). Add cancel_delayed_work_sync() for mac_work before acquiring the mutex in mt76_remain_on_channel() to prevent a secondary deadlock with the mac_work workqueue.

Affected products

• Linux kernel: from 6.14 before 6.18.33; from 6.19 before 7.0.10 — fixed in 6.18.33, 7.0.10

How to fix

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

References

• https://git.kernel.org/stable/c/5fc8c5d45e44575dda9fcabdc2aac4ad97baf0cd
• https://git.kernel.org/stable/c/6939b97ddad3cf3dfbb3b5a0a12ef79cb886747e
• https://git.kernel.org/stable/c/7a89c245d203aa0ed5ff2d68ac05b48b2ef9fa3f

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