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wifi: mt76: mt7603: initialize global station WCID

Type: advisorySources: OSV

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.

Products
Kernel
Affected versions
Not specified
Fixed versions
6.12.113, 6.18.57, 6.6.160, 7.2.11
CVEs
CVE-2026-99060
Confirmed fixed CVEs
Not specified
Updated in this feed
8 Nov 2026, 01:40 UTC · Revision 1

Source evidence

wifi: mt76: mt7603: initialize global station WCID

core-osv · Original source

Published 23 Oct 2026, 12:22 UTC

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.

osv:CVE-2026-99060

Kernel

Fixed versions: 6.6.160, 6.12.113, 6.18.57, 7.2.11

Complete source record
{
  "id": "bebfd245419e8956dc835f579878661426e6b54adc29f7b2dbc574aeaca270a3",
  "url": "https://osv.dev/vulnerability/CVE-2026-99060",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "wifi: mt76: mt7603: initialize global station WCID",
    "summary": "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.",
    "evidence": "osv:CVE-2026-99060",
    "products": [
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          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
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            "evidence": "/affected/1/ranges"
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          {
            "value": "6.12.113",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.18.57",
            "evidence": "/affected/1/ranges"
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          {
            "value": "7.2.11",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-99060",
      "aliases": [
        "CVE-2026-99060"
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      "affected": [
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            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-99060.json"
          }
        },
        {
          "ranges": [
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              "type": "ECOSYSTEM",
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                  "introduced": "0"
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            {
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                  "introduced": "6.13.0"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-99060.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.576406056Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/19d6fa087dcf242223645828b8282d4040bad168",
        "https://git.kernel.org/stable/c/456de496b53ae73e6e3020fec815dbdc88aa7c07",
        "https://git.kernel.org/stable/c/99b8bd6323e6fc69615af828522878b7acb77bff",
        "https://git.kernel.org/stable/c/dd117d17e8aa2e89f857fb708e5b770709fb81cb",
        "https://git.kernel.org/stable/c/e454ec553996f21085657c96c8a605e2d89a81a6",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99060.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-99060",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99060.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-99060",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521435,
  "published_at": "2026-10-23T12:22:49.164+00:00"
}