{
  "threat_severity" : "Moderate",
  "public_date" : "2025-12-24T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: Linux kernel: Denial of Service in ath9k Wi-Fi driver due to URB memory leak",
    "id" : "2425119",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2425119"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-772",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nwifi: ath9k: hif_usb: fix memory leak of urbs in ath9k_hif_usb_dealloc_tx_urbs()\nSyzkaller reports a long-known leak of urbs in\nath9k_hif_usb_dealloc_tx_urbs().\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->dev or\nurb->ep fields have not been initialized and usb_kill_urb() returns\nimmediately.\nThe patch removes trying to kill urbs located in hif_dev->tx.tx_buf\nbecause hif_dev->tx.tx_buf is not supposed to contain urbs which are in\npending state (the pending urbs are stored in hif_dev->tx.tx_pending).\nThe tx.tx_lock is acquired so there should not be any changes in the list.\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.", "A flaw was found in the Linux kernel's ath9k Wi-Fi driver. This memory leak vulnerability occurs because Universal Serial Bus (USB) request blocks (URBs) are allocated but not properly freed when certain conditions are met during USB device handling. A local attacker could exploit this by triggering the specific USB device handling, leading to a denial of service due to resource exhaustion." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2023-11-14T00:00:00Z",
    "advisory" : "RHSA-2023:7077",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-513.5.1.el8_9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-11-07T00:00:00Z",
    "advisory" : "RHSA-2023:6583",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-362.8.1.el9_3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-11-07T00:00:00Z",
    "advisory" : "RHSA-2023:6583",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-362.8.1.el9_3"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Under investigation",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2022-50740\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50740\nhttps://lore.kernel.org/linux-cve-announce/2025122448-CVE-2022-50740-a780@gregkh/T" ],
  "name" : "CVE-2022-50740",
  "csaw" : false
}