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CVE-2022-50740 (GCVE-0-2022-50740)

Vulnerability from cvelistv5 – Published: 2025-12-24 13:05 – Updated: 2026-05-23 15:25
VLAI
Title
wifi: ath9k: hif_usb: fix memory leak of urbs in ath9k_hif_usb_dealloc_tx_urbs()
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6f0706ef39fecc6bf56d67728fe0c94e26b43e9d , < 134ae5eba41294eff76e4be20d6001b8f0192207 (git)
Affected: 795d57a558d106b8a5bc2bd7aeaf707d9a099244 , < 472312fef2b9eccaa03bd59e0ab2527da945e736 (git)
Affected: df4318440c1568b7dedc5f7d4e617d0e297a1313 , < eddbb8f7620f9f8008b090a6e10c460074ca575a (git)
Affected: a9990ed2d7ca9339d37c7f67d6f5cb298c3f1b34 , < 9850791d389b342ae6e573fe8198db0b4d338352 (git)
Affected: 03fb92a432ea5abe5909bca1455b7e44a9380480 , < c3fb3e9a2c0c1a0fa492d90eb19bcfa92a5f884d (git)
Affected: 03fb92a432ea5abe5909bca1455b7e44a9380480 , < d856f7574bcc1d81de565a857caf32f122cd7ce0 (git)
Affected: 03fb92a432ea5abe5909bca1455b7e44a9380480 , < c05189a429fdb371dd455c3c466d67ac2ebff152 (git)
Affected: 03fb92a432ea5abe5909bca1455b7e44a9380480 , < 08aa0537ec8cf29ceccae98acc1a534fc12598c1 (git)
Affected: 03fb92a432ea5abe5909bca1455b7e44a9380480 , < c2a94de38c74e86f49124ac14f093d6a5c377a90 (git)
Affected: b92e116ae36f498858dbb18e29a066c3f5348965 (git)
Affected: 7f5972267295fe49f8da8eb42bc2eb3d140860c0 (git)
Affected: 2d72d5ce63c92f56b9f978e8befb5838144176b9 (git)
Affected: 4.9.241 , < 4.9.337 (semver)
Affected: 4.14.203 , < 4.14.303 (semver)
Affected: 4.19.154 , < 4.19.270 (semver)
Affected: 5.4.73 , < 5.4.229 (semver)
Affected: 4.4.241 , < 4.5 (semver)
Affected: 5.8.17 , < 5.9 (semver)
Affected: 5.9.2 , < 5.10 (semver)
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Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 4.9.337 , ≤ 4.9.* (semver)
Unaffected: 4.14.303 , ≤ 4.14.* (semver)
Unaffected: 4.19.270 , ≤ 4.19.* (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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      "title": "wifi: ath9k: hif_usb: fix memory leak of urbs in ath9k_hif_usb_dealloc_tx_urbs()",
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          {
            "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": "2026-06-17T05:24:05.880",
        "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": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-21T18:47:39+00:00",
      "cve": "CVE-2022-50740",
      "id": "CVE-2022-50740",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "120",
      "product_status:known_affected": "138",
      "product_status:known_not_affected": "104",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Denial of Service in ath9k Wi-Fi driver due to URB memory leak",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50740.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-29T02:19:10Z",
      "cve": "CVE-2022-50740",
      "id": "CVE-2022-50740",
      "initial_release_date": "2025-12-25T01:04:29Z",
      "product_status:known_affected": "460",
      "product_status:known_not_affected": "268",
      "product_status:recommended": "268",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50740",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50740.json",
      "version": "29"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.