{
  "cveId": "CVE-2021-22600",
  "url": "https://patchblox.com/security/cve/CVE-2021-22600",
  "summary": "CVE-2021-22600 is fixed in 12 products on 1 platform, first by DEBIAN-CVE-2021-22600, released January 26, 2022. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on April 11, 2022. Patch Radar priority: Patch now.",
  "title": "linux: A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted sys...",
  "description": "A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755",
  "published": "2022-01-26T14:15:08Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.06586,
  "epssPercentile": 0.93877,
  "priority": "Patch now",
  "priorityTier": 1,
  "exploited": true,
  "vendorExploited": false,
  "disclosed": false,
  "kev": {
    "added": "2022-04-11T00:00:00Z",
    "due": "2022-05-02T00:00:00Z",
    "ransomware": false,
    "requiredAction": "Apply updates per vendor instructions."
  },
  "fixes": [
    {
      "platform": "linux",
      "product": "kernel-uek",
      "release": "ol 8",
      "fixedVersion": "0:5.4.17-2136.306.1.3.el8uek",
      "fix": "ELSA-2022-9273",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-9273",
      "released": "2022-04-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-uek-container",
      "release": "ol 8",
      "fixedVersion": "0:5.4.17-2136.306.1.3.el8",
      "fix": "ELSA-2022-9274",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-9274",
      "released": "2022-04-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-uek-container-debug",
      "release": "ol 8",
      "fixedVersion": "0:5.4.17-2136.306.1.3.el8",
      "fix": "ELSA-2022-9274",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-9274",
      "released": "2022-04-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-uek-debug",
      "release": "ol 8",
      "fixedVersion": "0:5.4.17-2136.306.1.3.el8uek",
      "fix": "ELSA-2022-9273",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-9273",
      "released": "2022-04-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-uek-debug-devel",
      "release": "ol 8",
      "fixedVersion": "0:5.4.17-2136.306.1.3.el8uek",
      "fix": "ELSA-2022-9273",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-9273",
      "released": "2022-04-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-uek-devel",
      "release": "ol 8",
      "fixedVersion": "0:5.4.17-2136.306.1.3.el8uek",
      "fix": "ELSA-2022-9273",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-9273",
      "released": "2022-04-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-uek-doc",
      "release": "ol 8",
      "fixedVersion": "0:5.4.17-2136.306.1.3.el8uek",
      "fix": "ELSA-2022-9273",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-9273",
      "released": "2022-04-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-uek-tools",
      "release": "ol 8",
      "fixedVersion": "0:5.4.17-2136.306.1.3.el7uek",
      "fix": "ELSA-2022-9273",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-9273",
      "released": "2022-04-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-uek-tools-libs",
      "release": "ol 8",
      "fixedVersion": "0:5.4.17-2136.306.1.3.el7uek",
      "fix": "ELSA-2022-9273",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-9273",
      "released": "2022-04-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-22600",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-22600",
      "released": "2022-01-26T14:15:08Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-22600",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-22600",
      "released": "2022-01-26T14:15:08Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-22600",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-22600",
      "released": "2022-01-26T14:15:08Z"
    },
    {
      "platform": "linux",
      "product": "perf",
      "release": "ol 8",
      "fixedVersion": "0:5.4.17-2136.306.1.3.el7uek",
      "fix": "ELSA-2022-9273",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-9273",
      "released": "2022-04-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python-perf",
      "release": "ol 8",
      "fixedVersion": "0:5.4.17-2136.306.1.3.el7uek",
      "fix": "ELSA-2022-9273",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-9273",
      "released": "2022-04-11T00:00:00Z"
    }
  ],
  "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"
  }
}