{
  "cveId": "CVE-2022-49755",
  "url": "https://patchblox.com/security/cve/CVE-2022-49755",
  "summary": "CVE-2022-49755 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49755, released March 27, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  usb: gadget: f_fs: Prevent race during ffs_ep0_q...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  usb: gadget: f_fs: Prevent race during ffs_ep0_queue_wait  While performing fast composition switch, there is a possibility that the process of ffs_ep0_write/ffs_ep0_read get into a race condition due to ep0req being freed up from functionfs_unbind.  Consider the scenario that the ffs_ep0_write calls the ffs_ep0_queue_wait by taking a lock \u0026ffs-\u003Eev.waitq.lock. However, the functionfs_unbind isn\u0027t bounded so it can go ahead and mark the ep0req to NULL, and since there is no NULL check in ffs_ep0_queue_wait we will end up in use-after-free.  Fix this by making a serialized execution between the two functions using a mutex_lock(ffs-\u003Emutex).",
  "published": "2025-03-27T17:15:40Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00232,
  "epssPercentile": 0.14178,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.11-1",
      "fix": "DEBIAN-CVE-2022-49755",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49755",
      "released": "2025-03-27T17:15:40Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.11-1",
      "fix": "DEBIAN-CVE-2022-49755",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49755",
      "released": "2025-03-27T17:15:40Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.11-1",
      "fix": "DEBIAN-CVE-2022-49755",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-49755",
      "released": "2025-03-27T17:15:40Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}