GHSA-88MV-32MF-F27J
Vulnerability from github – Published: 2026-10-23 15:31 – Updated: 2026-10-23 15:31In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7603: initialize global station WCID
mt7603 uses a driver-private global station WCID for frames that have neither a station nor a vif, including frames injected through a monitor interface. Unlike the core global WCID initialized by mt76_register_device(), this WCID is published without ever being passed to mt76_wcid_init().
Since commit 0335c034e726 ("wifi: mt76: fix race condition related to checking tx queue fill status"), mt76_tx() queues every such frame on the WCID's tx_pending or tx_offchannel queue and links its tx_list. The first injected frame therefore reaches __skb_queue_tail() with an uninitialized sk_buff_head and dereferences a NULL prev pointer.
Initialize the WCID before publishing it.
The fix was tested on an MT7603 PCIe device. Three wildcard probe requests were injected through a monitor interface. The hardware queue head and tail advanced from 0 to 3 and a second radio captured the third request over the air. No oops or reset occurred. After restoring AP mode, a 150 MB transfer also completed without a reset.
{
"affected": [],
"aliases": [
"CVE-2026-99060"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-23T13:17:29Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7603: initialize global station WCID\n\nmt7603 uses a driver-private global station WCID for frames that have\nneither a station nor a vif, including frames injected through a monitor\ninterface. Unlike the core global WCID initialized by\nmt76_register_device(), this WCID is published without ever being passed\nto mt76_wcid_init().\n\nSince commit 0335c034e726 (\"wifi: mt76: fix race condition related to\nchecking tx queue fill status\"), mt76_tx() queues every such frame on the\nWCID\u0027s tx_pending or tx_offchannel queue and links its tx_list. The first\ninjected frame therefore reaches __skb_queue_tail() with an uninitialized\nsk_buff_head and dereferences a NULL prev pointer.\n\nInitialize the WCID before publishing it.\n\nThe fix was tested on an MT7603 PCIe device. Three wildcard probe requests\nwere injected through a monitor interface. The hardware queue head and tail\nadvanced from 0 to 3 and a second radio captured the third request over the\nair. No oops or reset occurred. After restoring AP mode, a 150 MB transfer\nalso completed without a reset.",
"id": "GHSA-88mv-32mf-f27j",
"modified": "2026-10-23T15:31:36Z",
"published": "2026-10-23T15:31:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99060"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/19d6fa087dcf242223645828b8282d4040bad168"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/456de496b53ae73e6e3020fec815dbdc88aa7c07"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/99b8bd6323e6fc69615af828522878b7acb77bff"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dd117d17e8aa2e89f857fb708e5b770709fb81cb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e454ec553996f21085657c96c8a605e2d89a81a6"
}
],
"schema_version": "1.4.0",
"severity": []
}
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