GHSA-RJQR-MG4V-422G
Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-10-21 15:41In 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.
{
"affected": [],
"aliases": [
"CVE-2026-90367"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:35Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7996: hold dev-\u003emt76.mutex while disabling tx worker in SER\n\nmt7996_mac_reset_work() parked the tx worker and disabled the RX/TX NAPIs\nbefore taking dev-\u003emt76.mutex. mt76_worker_disable()/_enable() are plain\nkthread park/unpark, not refcounted, and __mt76_set_channel() toggles the\nsame worker and the MT76_RESET bit under the mutex. An L1 SER racing a\nchannel switch could therefore have the worker unparked and MT76_RESET\ncleared while the reset path resets the DMA rings, corrupting descriptors\nor tokens. Take the mutex before disabling the worker, as mt7915 does.",
"id": "GHSA-rjqr-mg4v-422g",
"modified": "2026-10-21T15:41:25Z",
"published": "2026-09-17T18:32:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90367"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/594c4b7f89f9ea75dc9c50b5e4c4296db4a3d701"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6190db312b8230813f529f014b26247c6d9800d0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/69f23622533a4f054b5c8fdb226c3319ffa017b6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/906ad486ba5c4933d82e1ebe0685656390a48450"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bc4f4389f439e808185778d298da36976d13d415"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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