{
  "cveId": "CVE-2021-47559",
  "url": "https://patchblox.com/security/cve/CVE-2021-47559",
  "summary": "CVE-2021-47559 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47559, released May 24, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  net/smc: Fix NULL pointer dereferencing in smc_v...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net/smc: Fix NULL pointer dereferencing in smc_vlan_by_tcpsk()  Coverity reports a possible NULL dereferencing problem:  in smc_vlan_by_tcpsk(): 6. returned_null: netdev_lower_get_next returns NULL (checked 29 out of 30 times). 7. var_assigned: Assigning: ndev = NULL return value from netdev_lower_get_next. 1623                ndev = (struct net_device *)netdev_lower_get_next(ndev, \u0026lower); CID 1468509 (#1 of 1): Dereference null return value (NULL_RETURNS) 8. dereference: Dereferencing a pointer that might be NULL ndev when calling is_vlan_dev. 1624                if (is_vlan_dev(ndev)) {  Remove the manual implementation and use netdev_walk_all_lower_dev() to iterate over the lower devices. While on it remove an obsolete function parameter comment.",
  "published": "2024-05-24T15:15:20Z",
  "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": 0.00468,
  "epssPercentile": 0.40751,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47559",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47559",
      "released": "2024-05-24T15:15:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47559",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47559",
      "released": "2024-05-24T15:15:20Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47559",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47559",
      "released": "2024-05-24T15:15:20Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}