wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90367 · published 17 Sept 2026
How serious is it
- Severity: high, CVSS score 8.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-90367?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 27015b6fbcca836c6dbf196afc266e068af4aeec to < bc4f4389f439e808185778d298da36976d13d415, 27015b6fbcca836c6dbf196afc266e068af4aeec to < 69f23622533a4f054b5c8fdb226c3319ffa017b6, 27015b6fbcca836c6dbf196afc266e068af4aeec to < 906ad486ba5c4933d82e1ebe0685656390a48450, 27015b6fbcca836c6dbf196afc266e068af4aeec to < 594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701
- Linux Linux: 6.4
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/bc4f4389f439e808185778d298da36976d13d415
- git.kernel.org/stable/c/69f23622533a4f054b5c8fdb226c3319ffa017b6
- git.kernel.org/stable/c/906ad486ba5c4933d82e1ebe0685656390a48450
- git.kernel.org/stable/c/594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701
- git.kernel.org/stable/c/6190db312b8230813f529f014b26247c6d9800d0
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON