{
  "cveId": "CVE-2021-43400",
  "url": "https://patchblox.com/security/cve/CVE-2021-43400",
  "summary": "CVE-2021-43400 is fixed in 7 products on 1 platform, first by bluetooth 5.53-0ubuntu3.4, released November 12, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "bluetooth: An issue was discovered in gatt-database.c in BlueZ 5.61",
  "description": "An issue was discovered in gatt-database.c in BlueZ 5.61. A use-after-free can occur when a client disconnects during D-Bus processing of a WriteValue call.",
  "published": "2021-11-04T16:15:00Z",
  "severity": "Medium",
  "epss": 0.0166,
  "epssPercentile": 0.76828,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bluetooth",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "5.48-0ubuntu3.6",
      "fix": "bluetooth 5.48-0ubuntu3.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-bluetooth-5.48-0ubuntu3.6",
      "released": "2021-11-29T00:15:00Z"
    },
    {
      "platform": "linux",
      "product": "bluetooth",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "5.53-0ubuntu3.4",
      "fix": "bluetooth 5.53-0ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-bluetooth-5.53-0ubuntu3.4",
      "released": "2021-11-12T15:15:00Z"
    },
    {
      "platform": "linux",
      "product": "bluez",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "5.48-0ubuntu3.6",
      "fix": "bluez 5.48-0ubuntu3.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-bluez-5.48-0ubuntu3.6",
      "released": "2021-11-29T00:15:00Z"
    },
    {
      "platform": "linux",
      "product": "bluez",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "5.53-0ubuntu3.4",
      "fix": "bluez 5.53-0ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-bluez-5.53-0ubuntu3.4",
      "released": "2021-11-12T15:15:00Z"
    },
    {
      "platform": "linux",
      "product": "bluez-cups",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "5.48-0ubuntu3.6",
      "fix": "bluez-cups 5.48-0ubuntu3.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-bluez-cups-5.48-0ubuntu3.6",
      "released": "2021-11-29T00:15:00Z"
    },
    {
      "platform": "linux",
      "product": "bluez-cups",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "5.53-0ubuntu3.4",
      "fix": "bluez-cups 5.53-0ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-bluez-cups-5.53-0ubuntu3.4",
      "released": "2021-11-12T15:15:00Z"
    },
    {
      "platform": "linux",
      "product": "bluez-hcidump",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "5.48-0ubuntu3.6",
      "fix": "bluez-hcidump 5.48-0ubuntu3.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-bluez-hcidump-5.48-0ubuntu3.6",
      "released": "2021-11-29T00:15:00Z"
    },
    {
      "platform": "linux",
      "product": "bluez-hcidump",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "5.53-0ubuntu3.4",
      "fix": "bluez-hcidump 5.53-0ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-bluez-hcidump-5.53-0ubuntu3.4",
      "released": "2021-11-12T15:15:00Z"
    },
    {
      "platform": "linux",
      "product": "bluez-obexd",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "5.48-0ubuntu3.6",
      "fix": "bluez-obexd 5.48-0ubuntu3.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-bluez-obexd-5.48-0ubuntu3.6",
      "released": "2021-11-29T00:15:00Z"
    },
    {
      "platform": "linux",
      "product": "bluez-obexd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "5.53-0ubuntu3.4",
      "fix": "bluez-obexd 5.53-0ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-bluez-obexd-5.53-0ubuntu3.4",
      "released": "2021-11-12T15:15:00Z"
    },
    {
      "platform": "linux",
      "product": "bluez-tests",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "5.48-0ubuntu3.6",
      "fix": "bluez-tests 5.48-0ubuntu3.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-bluez-tests-5.48-0ubuntu3.6",
      "released": "2021-11-29T00:15:00Z"
    },
    {
      "platform": "linux",
      "product": "bluez-tests",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "5.53-0ubuntu3.4",
      "fix": "bluez-tests 5.53-0ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-bluez-tests-5.53-0ubuntu3.4",
      "released": "2021-11-12T15:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libbluetooth3",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "5.48-0ubuntu3.6",
      "fix": "libbluetooth3 5.48-0ubuntu3.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libbluetooth3-5.48-0ubuntu3.6",
      "released": "2021-11-29T00:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libbluetooth3",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "5.53-0ubuntu3.4",
      "fix": "libbluetooth3 5.53-0ubuntu3.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libbluetooth3-5.53-0ubuntu3.4",
      "released": "2021-11-12T15:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}