{
  "cveId": "CVE-2021-47102",
  "url": "https://patchblox.com/security/cve/CVE-2021-47102",
  "summary": "CVE-2021-47102 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47102, released March 4, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  net: marvell: prestera: fix incorrect structure...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net: marvell: prestera: fix incorrect structure access  In line: \tupper = info-\u003Eupper_dev; We access upper_dev field, which is related only for particular events (e.g. event == NETDEV_CHANGEUPPER). So, this line cause invalid memory access for another events, when ptr is not netdev_notifier_changeupper_info.  The KASAN logs are as follows:  [   30.123165] BUG: KASAN: stack-out-of-bounds in prestera_netdev_port_event.constprop.0\u002B0x68/0x538 [prestera] [   30.133336] Read of size 8 at addr ffff80000cf772b0 by task udevd/778 [   30.139866] [   30.141398] CPU: 0 PID: 778 Comm: udevd Not tainted 5.16.0-rc3 #6 [   30.147588] Hardware name: DNI AmazonGo1 A7040 board (DT) [   30.153056] Call trace: [   30.155547]  dump_backtrace\u002B0x0/0x2c0 [   30.159320]  show_stack\u002B0x18/0x30 [   30.162729]  dump_stack_lvl\u002B0x68/0x84 [   30.166491]  print_address_description.constprop.0\u002B0x74/0x2b8 [   30.172346]  kasan_report\u002B0x1e8/0x250 [   30.176102]  __asan_load8\u002B0x98/0xe0 [   30.179682]  prestera_netdev_port_event.constprop.0\u002B0x68/0x538 [prestera] [   30.186847]  prestera_netdev_event_handler\u002B0x1b4/0x1c0 [prestera] [   30.193313]  raw_notifier_call_chain\u002B0x74/0xa0 [   30.197860]  call_netdevice_notifiers_info\u002B0x68/0xc0 [   30.202924]  register_netdevice\u002B0x3cc/0x760 [   30.207190]  register_netdev\u002B0x24/0x50 [   30.211015]  prestera_device_register\u002B0x8a0/0xba0 [prestera]",
  "published": "2024-03-04T18:15:08Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00332,
  "epssPercentile": 0.26529,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47102",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47102",
      "released": "2024-03-04T18:15:08Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47102",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47102",
      "released": "2024-03-04T18:15:08Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47102",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47102",
      "released": "2024-03-04T18:15:08Z"
    }
  ],
  "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"
  }
}