{
  "fix": "ALAS2023-2023-055",
  "url": "https://patchblox.com/security/fix/linux/alas2023-2023-055",
  "summary": "ALAS2023-2023-055, released February 17, 2023, fixes 6 CVEs in microcode_ctl (version 2:2.1-53.amzn2023). None of them is reported as exploited. Patch Radar priority: Routine.",
  "platform": "linux",
  "type": "advisory",
  "title": "microcode_ctl security update",
  "released": "2023-02-17T20:45:00Z",
  "priority": "Routine",
  "priorityTier": 4,
  "priorityReason": "Closes 6 CVEs, none high severity",
  "supported": true,
  "cveCount": 6,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00361,
  "maxCvss": 5.5,
  "vendorAdvisory": "https://alas.aws.amazon.com/AL2023/ALAS-2023-055.html",
  "appliesTo": [
    {
      "product": "microcode_ctl",
      "productUrl": "https://patchblox.com/security/product/linux/microcode-ctl",
      "release": "amzn 2023",
      "fixedVersion": "2:2.1-53.amzn2023",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2022-21151",
      "url": "https://patchblox.com/security/cve/CVE-2022-21151",
      "title": "microcode_ctl: For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.1 Release Notes linked from t...",
      "priority": "Routine",
      "severity": "Moderate",
      "cvss": 5.5,
      "epss": 0.00361,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-21233",
      "url": "https://patchblox.com/security/cve/CVE-2022-21233",
      "title": "intel-microcode: Improper isolation of shared resources in some Intel(R) Processors mayallow a privileged user to potentially enable i...",
      "priority": "Routine",
      "severity": "Medium",
      "cvss": 5.5,
      "epss": 0.00326,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-33117",
      "url": "https://patchblox.com/security/cve/CVE-2021-33117",
      "title": "intel-microcode: Improper access control for some 3rd Generation Intel(R) Xeon(R) Scalable Processors before BIOS version MR7, may all...",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 5.5,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-21131",
      "url": "https://patchblox.com/security/cve/CVE-2022-21131",
      "title": "microcode_ctl: Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities:\nCVE-2022-21233:\n\tA flaw w...",
      "priority": "Routine",
      "severity": "moderate",
      "epss": 0.003,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-21136",
      "url": "https://patchblox.com/security/cve/CVE-2022-21136",
      "title": "microcode_ctl: For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.1 Release Notes linked from t...",
      "priority": "Routine",
      "severity": "Moderate",
      "cvss": 2.7,
      "epss": 0.0027,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-0005",
      "url": "https://patchblox.com/security/cve/CVE-2022-0005",
      "title": "microcode_ctl: For detailed information on changes in this release, see the Red Hat Enterprise Linux 9.1 Release Notes linked from t...",
      "priority": "Routine",
      "severity": "Moderate",
      "cvss": 4.9,
      "epss": 0.00206,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}