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CVE-2026-90367— wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： wifi: mt76: mt7996: 在 SER 中禁用 tx worker 时持有 dev->mt76.mutex 在获取 之前，先暂停（park）了 tx worker 并禁用了 RX/TX NAPI。由于 / 是普通的内核线程暂停/恢复操作（并非引用计数机制），而 会在该互斥锁保护下操作同一个 worker 并切换 标志位。因此，若 L1 SER（软件错误恢复）与信道切换发生竞争，可能导致 worker 被恢复运行且 被清除，而重置路径仍在重置 DMA 环，从而

CVSS 8.8 · High EPSS 0.24% · P15

Possible ATT&CK Techniques 1 AI

T1059.004 · Unix Shell

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux 27015b6fbcca836c6dbf196afc266e068af4aeec< 906ad486ba5c4933d82e1ebe0685656390a48450 affected
27015b6fbcca836c6dbf196afc266e068af4aeec< 594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701 affected
27015b6fbcca836c6dbf196afc266e068af4aeec< 6190db312b8230813f529f014b26247c6d9800d0 affected
6.4 affected
< 6.4 unaffected
6.18.52≤ 6.18.* unaffected
7.2.6≤ 7.2.* unaffected
7.3-rc1≤ * unaffected
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I. Basic Information for CVE-2026-90367

Vulnerability Information
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Vulnerability Title
wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER mt7996_mac_reset_work() parked the tx worker and disabled the RX/TX NAPIs before taking dev->mt76.mutex. mt76_worker_disable()/_enable() are plain kthread park/unpark, not refcounted, and __mt76_set_channel() toggles the same worker and the MT76_RESET bit under the mutex. An L1 SER racing a channel switch could therefore have the worker unparked and MT76_RESET cleared while the reset path resets the DMA rings, corrupting descriptors or tokens. Take the mutex before disabling the worker, as mt7915 does.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 27015b6fbcca836c6dbf196afc266e068af4aeec ~ 906ad486ba5c4933d82e1ebe0685656390a48450 -
Linux Linux 6.4 -

II. Public POCs for CVE-2026-90367

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III. Intelligence Information for CVE-2026-90367

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Patches & Fixes for CVE-2026-90367 (3)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90255 8.8 HIGH Bluetooth: hci_conn: fix the SCO setup context lifetime
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-90367

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