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GHSA-P547-P22Q-3VH3

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-19 18:32
VLAI
Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7615: drop TXRX_NOTIFY on non-mmio buses

PKT_TYPE_TXRX_NOTIFY is an mmio-only event, but mt7615_rx_check() and mt7615_queue_rx_skb() dispatch it to mt7615_mac_tx_free() on every bus. mt7615_mac_tx_free() cleans the DMA tx queues with mt76_queue_tx_cleanup(), which calls queue_ops->tx_cleanup(). Only the mmio queue ops implement that callback; on the mt7663 USB and SDIO buses it is NULL, so a TXRX_NOTIFY there calls a NULL pointer in the RX worker. Same defect as the mt7921 and mt7925 patches in this series.

Drop the event on non-mmio buses via mt76_is_mmio(), as in commit 5683e1488aa9 ("wifi: mt76: connac: do not check WED status for non-mmio devices").

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68195"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:06Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: mt7615: drop TXRX_NOTIFY on non-mmio buses\n\nPKT_TYPE_TXRX_NOTIFY is an mmio-only event, but mt7615_rx_check() and\nmt7615_queue_rx_skb() dispatch it to mt7615_mac_tx_free() on every bus.\nmt7615_mac_tx_free() cleans the DMA tx queues with\nmt76_queue_tx_cleanup(), which calls queue_ops-\u003etx_cleanup(). Only the\nmmio queue ops implement that callback; on the mt7663 USB and SDIO\nbuses it is NULL, so a TXRX_NOTIFY there calls a NULL pointer in the RX\nworker. Same defect as the mt7921 and mt7925 patches in this series.\n\nDrop the event on non-mmio buses via mt76_is_mmio(), as in\ncommit 5683e1488aa9 (\"wifi: mt76: connac: do not check WED status for\nnon-mmio devices\").",
  "id": "GHSA-p547-p22q-3vh3",
  "modified": "2026-08-19T18:32:10Z",
  "published": "2026-08-10T15:33:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68195"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1a099d630b8667fa622662b85e35a0ef659fb343"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/39afc46c0243d10b7795e6e6cf4ae91f41732120"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/664f8bbc61e45e062679da512bf12f8f6fb26a1b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/88c98ef247a3126fea9bbbda953a18a2f36c3ea7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0b3e8d8726c3830102a18946c766c94c953c7f2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ab4d213393e846baa6437497f94dda7553cbeda7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2ab73b8123ce6cf2bc32634bfee4928676ffa66"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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