{
  "cveId": "CVE-2026-4428",
  "url": "https://patchblox.com/security/cve/CVE-2026-4428",
  "summary": "CVE-2026-4428 is fixed in 5 products on 1 platform, first by ALAS2023-2026-1564, released April 13, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "amazon-efs-utils: A logic error in CRL distribution point validation in AWS-LC before 1.71.0 causes partitioned CRLs to be incorrectly...",
  "description": "A logic error in CRL distribution point validation in AWS-LC before 1.71.0 causes partitioned CRLs to be incorrectly rejected as out of scope, which allows a revoked certificate to bypass certificate revocation checks.",
  "published": "2026-04-13T09:00:00Z",
  "severity": "important",
  "epss": 0.00257,
  "epssPercentile": 0.17461,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "amazon-efs-utils",
      "release": "amzn 2023",
      "fixedVersion": "3.0.0-4.amzn2023",
      "fix": "ALAS2023-2026-1564",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1564",
      "released": "2026-04-13T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "aws-nitro-tpm-tools",
      "release": "amzn 2023",
      "fixedVersion": "1.1.2-1.amzn2023",
      "fix": "ALAS2023-2026-1905",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1905",
      "released": "2026-07-06T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "mount-s3",
      "release": "amzn 2023",
      "fixedVersion": "1.22.3-1.amzn2023",
      "fix": "ALAS2023-2026-1655",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1655",
      "released": "2026-05-11T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "mount-s3-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.22.3-1.amzn2023",
      "fix": "ALAS2023-2026-1655",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1655",
      "released": "2026-05-11T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "mount-s3-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1.22.3-1.amzn2023",
      "fix": "ALAS2023-2026-1655",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1655",
      "released": "2026-05-11T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-11T13:47:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}