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wifi: mt76: mt7603: initialize global station WCID

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-99060

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-99060

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "d2defcddfe90b3be0cfccc2482495ab1fb759586",
        "lessThan": "99b8bd6323e6fc69615af828522878b7acb77bff",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0335c034e7265d36d956e806f33202c94a8a9860",
        "lessThan": "e454ec553996f21085657c96c8a605e2d89a81a6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0335c034e7265d36d956e806f33202c94a8a9860",
        "lessThan": "dd117d17e8aa2e89f857fb708e5b770709fb81cb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0335c034e7265d36d956e806f33202c94a8a9860",
        "lessThan": "19d6fa087dcf242223645828b8282d4040bad168",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0335c034e7265d36d956e806f33202c94a8a9860",
        "lessThan": "456de496b53ae73e6e3020fec815dbdc88aa7c07",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6.6.48",
        "lessThan": "6.6.160",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/mediatek/mt76/mt7603/init.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.7",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.113",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.57",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.11",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/mediatek/mt76/mt7603/init.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-99060

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#52884 · Revision 1
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Publisher date
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