{
  "cveId": "CVE-2021-47333",
  "url": "https://patchblox.com/security/cve/CVE-2021-47333",
  "summary": "CVE-2021-47333 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47333, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  misc: alcor_pci: fix null-ptr-deref when there i...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  misc: alcor_pci: fix null-ptr-deref when there is no PCI bridge  There is an issue with the ASPM(optional) capability checking function. A device might be attached to root complex directly, in this case, bus-\u003Eself(bridge) will be NULL, thus priv-\u003Eparent_pdev is NULL. Since alcor_pci_init_check_aspm(priv-\u003Eparent_pdev) checks the PCI link\u0027s ASPM capability and populate parent_cap_off, which will be used later by alcor_pci_aspm_ctrl() to dynamically turn on/off device, what we can do here is to avoid checking the capability if we are on the root complex. This will make pdev_cap_off 0 and alcor_pci_aspm_ctrl() will simply return when bring called, effectively disable ASPM for the device.  [    1.246492] BUG: kernel NULL pointer dereference, address: 00000000000000c0 [    1.248731] RIP: 0010:pci_read_config_byte\u002B0x5/0x40 [    1.253998] Call Trace: [    1.254131]  ? alcor_pci_find_cap_offset.isra.0\u002B0x3a/0x100 [alcor_pci] [    1.254476]  alcor_pci_probe\u002B0x169/0x2d5 [alcor_pci]",
  "published": "2024-05-21T15:15:20Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00239,
  "epssPercentile": 0.15022,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47333",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47333",
      "released": "2024-05-21T15:15:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47333",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47333",
      "released": "2024-05-21T15:15:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2021-47333",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47333",
      "released": "2024-05-21T15:15:20Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}