{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e904cf6fe23022cde4e0ea9d41601411a315a3dc"
            },
            {
              "fixed": "47ed81aaa7f94d9808f4719e78a760c2ec1e6c86"
            },
            {
              "fixed": "48de0c6952192b0771fca468df4364d11ec74ad9"
            },
            {
              "fixed": "063497cc9f320ab71a7a937c3bc0a23e630aefe2"
            },
            {
              "fixed": "7f184ca38a90889f3f6665ff96748b95da39dbee"
            },
            {
              "fixed": "10b0ce629123a3737b4eda50188f73bb7be7b68b"
            },
            {
              "fixed": "48a69cedde7388294e4ea6fd804156cd62bc04fc"
            },
            {
              "fixed": "7c9046d92c4b9789c9d9d775e4fd5f34be64cb0a"
            },
            {
              "fixed": "dad9f96945d77ecd4708f730c06ef54dcd8cc057"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.4.0"
            },
            {
              "fixed": "5.10.265"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.216"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.183"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68363.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath9k: hif_usb: don't dereference hif_dev after re-arming firmware request\n\nath9k_hif_request_firmware() re-arms an asynchronous firmware load via\nrequest_firmware_nowait(), passing hif_dev as the completion context, and\nthen still dereferences hif_dev:\n\n\tdev_info(\u0026hif_dev-\u003eudev-\u003edev, \"ath9k_htc: Firmware %s requested\\n\",\n\t\t hif_dev-\u003efw_name);\n\nThe re-armed callback ath9k_hif_usb_firmware_cb() runs on the \"events\"\nworkqueue and, when the firmware is missing, walks the retry chain into\nath9k_hif_usb_firmware_fail() -\u003e complete_all(\u0026hif_dev-\u003efw_done). That\nreleases the wait_for_completion(\u0026hif_dev-\u003efw_done) in a concurrent\nath9k_hif_usb_disconnect(), which then kfree()s hif_dev. The trailing\ndev_info() in the frame that re-armed the request can therefore read freed\nmemory (hif_dev-\u003eudev, the first field of struct hif_device_usb):\n\n  BUG: KASAN: slab-use-after-free in ath9k_hif_request_firmware\n  Read of size 8 ... by task kworker/...\n   ath9k_hif_request_firmware\n   ath9k_hif_usb_firmware_cb           drivers/net/wireless/ath/ath9k/hif_usb.c:1247\n   request_firmware_work_func\n  Allocated by ...:\n   ath9k_hif_usb_probe                 drivers/net/wireless/ath/ath9k/hif_usb.c\n  Freed by ...:\n   ath9k_hif_usb_disconnect -\u003e kfree   drivers/net/wireless/ath/ath9k/hif_usb.c\n\nThe fw_done barrier only makes disconnect wait for the firmware chain to\n*terminate*; it does not protect the outer ath9k_hif_request_firmware()\nframe that re-armed the request and keeps touching hif_dev afterwards.\n\nDrop the post-request dev_info(): it is the only use of hif_dev after the\nasync request is armed, and it is purely informational (the dev_err() on the\nfailure path runs only when request_firmware_nowait() did not arm a callback,\nso hif_dev is still alive there).\n\nThis was first reported by syzbot as a single, non-reproduced crash that was\nlater auto-obsoleted, and was independently rediscovered by the reFuzz fuzzer,\nwhich produced a C reproducer (USB-gadget connect/disconnect of an ath9k_htc\ndevice whose firmware download fails). The vulnerable code is unchanged and\nstill present in v7.1-rc6, where the slab-use-after-free reproduces under KASAN\nonce the (sub-microsecond) race window is widened.",
  "id": "CVE-2026-68363",
  "modified": "2026-08-21T03:30:14.340320773Z",
  "published": "2026-08-10T12:03:40.355Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/063497cc9f320ab71a7a937c3bc0a23e630aefe2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/10b0ce629123a3737b4eda50188f73bb7be7b68b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/47ed81aaa7f94d9808f4719e78a760c2ec1e6c86"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48a69cedde7388294e4ea6fd804156cd62bc04fc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48de0c6952192b0771fca468df4364d11ec74ad9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c9046d92c4b9789c9d9d775e4fd5f34be64cb0a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7f184ca38a90889f3f6665ff96748b95da39dbee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dad9f96945d77ecd4708f730c06ef54dcd8cc057"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68363.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68363"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "wifi: ath9k: hif_usb: don't dereference hif_dev after re-arming firmware request"
}