CVE-2026-99060
Received
Received - Intake
WiFi Driver Global Station WCID Initialization Flaw in mt7603
Vulnerability report for CVE-2026-99060, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-23
Last updated on: 2026-10-23
Assigner: kernel.org
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | d2defcddfe90b3be0cfccc2482495ab1fb759586 |
| Linux | Linux | 0335c034e7265d36d956e806f33202c94a8a9860 |
| Linux | Linux | 0335c034e7265d36d956e806f33202c94a8a9860 |
| Linux | Linux | 0335c034e7265d36d956e806f33202c94a8a9860 |
| Linux | Linux | 0335c034e7265d36d956e806f33202c94a8a9860 |
| Linux | Linux | 6.6.48 |
| Linux | Linux | 6.7 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
