FKIE_CVE-2022-50740

Vulnerability from fkie_nvd - Published: 2025-12-24 13:16 - Updated: 2025-12-24 13:16
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: ath9k: hif_usb: fix memory leak of urbs in ath9k_hif_usb_dealloc_tx_urbs() Syzkaller reports a long-known leak of urbs in ath9k_hif_usb_dealloc_tx_urbs(). The cause of the leak is that usb_get_urb() is called but usb_free_urb() (or usb_put_urb()) is not called inside usb_kill_urb() as urb->dev or urb->ep fields have not been initialized and usb_kill_urb() returns immediately. The patch removes trying to kill urbs located in hif_dev->tx.tx_buf because hif_dev->tx.tx_buf is not supposed to contain urbs which are in pending state (the pending urbs are stored in hif_dev->tx.tx_pending). The tx.tx_lock is acquired so there should not be any changes in the list. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/08aa0537ec8cf29ceccae98acc1a534fc12598c1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/134ae5eba41294eff76e4be20d6001b8f0192207
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/472312fef2b9eccaa03bd59e0ab2527da945e736
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9850791d389b342ae6e573fe8198db0b4d338352
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c05189a429fdb371dd455c3c466d67ac2ebff152
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c2a94de38c74e86f49124ac14f093d6a5c377a90
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c3fb3e9a2c0c1a0fa492d90eb19bcfa92a5f884d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d856f7574bcc1d81de565a857caf32f122cd7ce0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eddbb8f7620f9f8008b090a6e10c460074ca575a
Impacted products
Vendor Product Version
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath9k: hif_usb: fix memory leak of urbs in ath9k_hif_usb_dealloc_tx_urbs()\n\nSyzkaller reports a long-known leak of urbs in\nath9k_hif_usb_dealloc_tx_urbs().\n\nThe cause of the leak is that usb_get_urb() is called but usb_free_urb()\n(or usb_put_urb()) is not called inside usb_kill_urb() as urb-\u003edev or\nurb-\u003eep fields have not been initialized and usb_kill_urb() returns\nimmediately.\n\nThe patch removes trying to kill urbs located in hif_dev-\u003etx.tx_buf\nbecause hif_dev-\u003etx.tx_buf is not supposed to contain urbs which are in\npending state (the pending urbs are stored in hif_dev-\u003etx.tx_pending).\nThe tx.tx_lock is acquired so there should not be any changes in the list.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller."
    }
  ],
  "id": "CVE-2022-50740",
  "lastModified": "2025-12-24T13:16:00.703",
  "metrics": {},
  "published": "2025-12-24T13:16:00.703",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/08aa0537ec8cf29ceccae98acc1a534fc12598c1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/134ae5eba41294eff76e4be20d6001b8f0192207"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/472312fef2b9eccaa03bd59e0ab2527da945e736"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9850791d389b342ae6e573fe8198db0b4d338352"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c05189a429fdb371dd455c3c466d67ac2ebff152"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c2a94de38c74e86f49124ac14f093d6a5c377a90"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c3fb3e9a2c0c1a0fa492d90eb19bcfa92a5f884d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d856f7574bcc1d81de565a857caf32f122cd7ce0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eddbb8f7620f9f8008b090a6e10c460074ca575a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}


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