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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-99060

wifi: mt76: mt7603: initialize global station WCID

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In 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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • d2defcddfe90b3be0cfccc2482495ab1fb759586 to < 99b8bd6323e6fc69615af828522878b7acb77bffaffected
  • 0335c034e7265d36d956e806f33202c94a8a9860 to < e454ec553996f21085657c96c8a605e2d89a81a6affected
  • 0335c034e7265d36d956e806f33202c94a8a9860 to < dd117d17e8aa2e89f857fb708e5b770709fb81cbaffected
  • 0335c034e7265d36d956e806f33202c94a8a9860 to < 19d6fa087dcf242223645828b8282d4040bad168affected
  • 0335c034e7265d36d956e806f33202c94a8a9860 to < 456de496b53ae73e6e3020fec815dbdc88aa7c07affected
  • 6.6.48 to < 6.6.160affected

Linux Linux

Default version status: affected

  • 6.7affected
  • 0 to < 6.7unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.113 to ≤ 6.12.*unaffected
  • 6.18.57 to ≤ 6.18.*unaffected
  • 7.2.11 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References