{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-64325",
  "modified": "2026-10-07T14:35:31Z",
  "upstream": [
    "CVE-2026-64325"
  ],
  "published": "2026-07-25T08:51:45Z",
  "summary": "wifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7921/mt7925: fix NULL dereference in CSA beacon\n\nThis patch is based on a BUG as reported by Bongani Hlope at\nhttps://lore.kernel.org/all/20260502125824.425d7159@bongani-mini.home.org.za/\n\nWhen a channel-switch announcement (CSA) beacon is received,\ncfg80211 queues a wiphy work item that eventually calls\nmt7921_channel_switch_rx_beacon(). If the station disconnects\n(or the channel context is otherwise torn down) between the\ntime the work is queued and the time it runs, the driver's\ndev->new_ctx pointer can already have been cleared to NULL.\nmt7921_channel_switch_rx_beacon() then dereferences new_ctx\nunconditionally, triggering a NULL pointer dereference at\naddress 0x0:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  RIP: 0010:mt7921_channel_switch_rx_beacon+0x1f/0x100 [mt7921_common]\n\nThe same missing guard exists in mt7925_channel_switch_rx_beacon(),\nwhich shares the same code pattern introduced by the same commit.\n\nAdd an early-return NULL check for dev->new_ctx in both\nmt7921_channel_switch_rx_beacon() and\nmt7925_channel_switch_rx_beacon(). When new_ctx is NULL there is\nno pending channel switch to process, so returning immediately is\nthe correct and safe action.\n\nOops-Analysis: http://oops.fenrus.org/reports/lkml/20260502125824.425d7159@bongani-mini.home.org.za/report.html",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:13",
        "name": "linux"
      },
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        "1:6.18.34-1+rpt1",
        "1:6.18.39-1+rpt1",
        "1:6.18.50-1+rpt1"
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      "ecosystem_specific": {
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            "linux_commit": "66318c5b5cd8145a662303af12ed39ac07eb27cc",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-64325"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/77e7b127472a191e086e1e0b1b051703f33b1801"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/351dd7d2c80d23e56dcce6faa4e62bea5b0877c7"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-17T05:24:08Z"
  }
}