{
  "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: Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities:\nCVE-2026-4428:\n\tA logic e...",
  "description": "Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities:\nCVE-2026-4428:\n\tA 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.\n\nTo remediate this issue, users should upgrade to AWS-LC 1.71.0 or AWS-LC-FIPS-3.3.0.\n\nCVE-2026-3338:\n\tImproper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.\n\n\n\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.\n\nCVE-2026-3337:\n\tObservable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.\n\n\n\n\nThe impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.\n\n\n\n\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.\n\nCVE-2026-3336:\n\tImproper certificate validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass certificate chain verification when processing PKCS7 objects with multiple signers, except the final signer.\n\nCustomers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.\n\nCVE-2026-25727:\n\ttime provides date and time handling in Rust. From 0.3.6 to before 0.3.47, when user-provided input is provided to any type that parses with the RFC 2822 format, a denial of service attack via stack exhaustion is possible. The attack relies on formally deprecated and rarely-used features that are part of the RFC 2822 format used in a malicious manner. Ordinary, non-malicious input will never encounter this scenario. A limit to the depth of recursion was added in v0.3.47. From this version, an error will be returned rather than exhausting the stack.",
  "published": "2026-04-13T09:00:00Z",
  "severity": "important",
  "epss": 0.00257,
  "epssPercentile": 0.17407,
  "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": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}