{
  "fix": "RHSA-2021:4424",
  "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4424",
  "summary": "RHSA-2021:4424, released November 9, 2021, fixes 2 CVEs across 4 products. None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "Security update for 4 packages",
  "released": "2021-11-09T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2021-23840, high severity",
  "supported": true,
  "cveCount": 2,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.50732,
  "maxCvss": 7.5,
  "vendorAdvisory": "https://access.redhat.com/errata/RHSA-2021:4424",
  "appliesTo": [
    {
      "product": "openssl",
      "productUrl": "https://patchblox.com/security/product/linux/openssl",
      "release": "RHEL 8",
      "fixedVersion": "1:1.1.1k-4.el8",
      "supported": true
    },
    {
      "product": "openssl-devel",
      "productUrl": "https://patchblox.com/security/product/linux/openssl-devel",
      "release": "RHEL 8",
      "fixedVersion": "1:1.1.1k-4.el8",
      "supported": true
    },
    {
      "product": "openssl-libs",
      "productUrl": "https://patchblox.com/security/product/linux/openssl-libs",
      "release": "RHEL 8",
      "fixedVersion": "1:1.1.1k-4.el8",
      "supported": true
    },
    {
      "product": "openssl-perl",
      "productUrl": "https://patchblox.com/security/product/linux/openssl-perl",
      "release": "RHEL 8",
      "fixedVersion": "1:1.1.1k-4.el8",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-23840",
      "url": "https://patchblox.com/security/cve/CVE-2021-23840",
      "title": "libssl3t64: Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate mayoverflow the output length argument in some cas...",
      "priority": "High",
      "severity": "Low",
      "cvss": 7.5,
      "epss": 0.50732,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-23841",
      "url": "https://patchblox.com/security/cve/CVE-2021-23841",
      "title": "edk2-aarch64: EDK (Embedded Development Kit) is a project to enable UEFI support for Virtual Machines",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 7.5,
      "epss": 0.0741,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}