CVE-2026-80938

wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex

N/A
Published: September 11, 2026 at 07:42 PM UTC
Updated: October 19, 2026 at 09:17 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
N/A
Exploit prediction
EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7615: avoid waiting for mac work under the mt76 mutex mt7615_suspend() acquired the mt76 mutex and then called cancel_delayed_work_sync() on mac_work. mt7615_mac_work() acquires the same mutex via mt7615_mutex_acquire() at the top of the worker, so if mac_work is already running and blocked on the mutex, the suspend path deadlocks waiting for the work it holds the mutex against. Flush scan_work and mac_work before taking the mutex, matching the suspend paths in mt7921 and mt7925. scan_work only takes the mt76 spinlock, but moving it keeps the sequence consistent. This also keeps mac_work from running over an already suspended HIF, which the previous split (async cancel under the lock, sync cancel after release) would have allowed.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.8c6bf20109a3fae92402cb76ad709ec5256bcd169
Vendor states this is fixed in 3114d479f2a1d31b2e6214c395794c6e5715e579 (fixed)
Vendor states this is fixed in 33d29aeb4c0eede92622a7d04ea492b94c30f089 (fixed)
Vendor states this is fixed in 36c73b86a09f0e51c0f81a75c8945b6c5557ff27 (fixed)
Vendor states this is fixed in 44be85af3e1772ffb3332feafedad2a73b22854c (fixed)
Vendor states this is fixed in 4506e229b2e468b8c64bcf52c50c41a3bf2e633e (fixed)
Vendor states this is fixed in bda8324270b1ac91bfba1df8928e0570e29759e8 (fixed)
Vendor states this is fixed in ef2ec8b537c3a54e241d693bd03016f80d0d4484 (fixed)
Vendor states this is fixed in 5.15.221 (unaffected)
Vendor states this is fixed in 5.8 (unaffected)
Vendor states this is fixed in 6.1.188 (unaffected)
Vendor states this is fixed in 6.12.109 (unaffected)
Vendor states this is fixed in 6.18.50 (unaffected)
Vendor states this is fixed in 6.6.157 (unaffected)
Vendor states this is fixed in 7.2.4 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

Quick Info

StatusRECEIVED

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