CVE-2026-68195 (GCVE-0-2026-68195)
Vulnerability from cvelistv5
Published
2026-08-10 12:00
Modified
2026-08-19 16:31
Severity ?
Summary
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").
References
Impacted products
Vendor Product Version
Linux Linux Version: eb99cc95c3b6513b495c4839ac4917206705f657
Version: eb99cc95c3b6513b495c4839ac4917206705f657
Version: eb99cc95c3b6513b495c4839ac4917206705f657
Version: eb99cc95c3b6513b495c4839ac4917206705f657
Version: eb99cc95c3b6513b495c4839ac4917206705f657
Version: eb99cc95c3b6513b495c4839ac4917206705f657
Version: eb99cc95c3b6513b495c4839ac4917206705f657
Version: eb99cc95c3b6513b495c4839ac4917206705f657
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{
  "containers": {
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          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/mediatek/mt76/mt7615/mac.c"
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      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\")."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:31:11.475Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/664f8bbc61e45e062679da512bf12f8f6fb26a1b"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a099d630b8667fa622662b85e35a0ef659fb343"
        },
        {
          "url": "https://git.kernel.org/stable/c/a0b3e8d8726c3830102a18946c766c94c953c7f2"
        },
        {
          "url": "https://git.kernel.org/stable/c/f2a72f47c5fb4ba6887e85bbe809d7e5b318d9d5"
        },
        {
          "url": "https://git.kernel.org/stable/c/88c98ef247a3126fea9bbbda953a18a2f36c3ea7"
        },
        {
          "url": "https://git.kernel.org/stable/c/ab4d213393e846baa6437497f94dda7553cbeda7"
        },
        {
          "url": "https://git.kernel.org/stable/c/b2ab73b8123ce6cf2bc32634bfee4928676ffa66"
        },
        {
          "url": "https://git.kernel.org/stable/c/39afc46c0243d10b7795e6e6cf4ae91f41732120"
        }
      ],
      "title": "wifi: mt76: mt7615: drop TXRX_NOTIFY on non-mmio buses",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68195",
    "datePublished": "2026-08-10T12:00:13.627Z",
    "dateReserved": "2026-07-30T09:28:09.374Z",
    "dateUpdated": "2026-08-19T16:31:11.475Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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