{
  "fix": "ALAS2023-2026-1633",
  "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1633",
  "summary": "ALAS2023-2026-1633, released April 27, 2026, fixes 1 CVE across 11 products. None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "advisory",
  "title": "Security update for 11 packages",
  "released": "2026-04-27T09:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2026-40170, high severity",
  "supported": true,
  "cveCount": 1,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00776,
  "maxCvss": 9,
  "vendorAdvisory": "https://alas.aws.amazon.com/AL2023/ALAS-2026-1633.html",
  "appliesTo": [
    {
      "product": "ngtcp2",
      "productUrl": "https://patchblox.com/security/product/linux/ngtcp2",
      "release": "amzn 2023",
      "fixedVersion": "1.21.0-1.amzn2023.0.2",
      "supported": true
    },
    {
      "product": "ngtcp2-crypto-gnutls",
      "productUrl": "https://patchblox.com/security/product/linux/ngtcp2-crypto-gnutls",
      "release": "amzn 2023",
      "fixedVersion": "1.21.0-1.amzn2023.0.2",
      "supported": true
    },
    {
      "product": "ngtcp2-crypto-gnutls-debuginfo",
      "productUrl": "https://patchblox.com/security/product/linux/ngtcp2-crypto-gnutls-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.21.0-1.amzn2023.0.2",
      "supported": true
    },
    {
      "product": "ngtcp2-crypto-gnutls-devel",
      "productUrl": "https://patchblox.com/security/product/linux/ngtcp2-crypto-gnutls-devel",
      "release": "amzn 2023",
      "fixedVersion": "1.21.0-1.amzn2023.0.2",
      "supported": true
    },
    {
      "product": "ngtcp2-crypto-ossl",
      "productUrl": "https://patchblox.com/security/product/linux/ngtcp2-crypto-ossl",
      "release": "amzn 2023",
      "fixedVersion": "1.21.0-1.amzn2023.0.2",
      "supported": true
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    {
      "product": "ngtcp2-crypto-ossl-debuginfo",
      "productUrl": "https://patchblox.com/security/product/linux/ngtcp2-crypto-ossl-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.21.0-1.amzn2023.0.2",
      "supported": true
    },
    {
      "product": "ngtcp2-crypto-ossl-devel",
      "productUrl": "https://patchblox.com/security/product/linux/ngtcp2-crypto-ossl-devel",
      "release": "amzn 2023",
      "fixedVersion": "1.21.0-1.amzn2023.0.2",
      "supported": true
    },
    {
      "product": "ngtcp2-debuginfo",
      "productUrl": "https://patchblox.com/security/product/linux/ngtcp2-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1.21.0-1.amzn2023.0.2",
      "supported": true
    },
    {
      "product": "ngtcp2-debugsource",
      "productUrl": "https://patchblox.com/security/product/linux/ngtcp2-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1.21.0-1.amzn2023.0.2",
      "supported": true
    },
    {
      "product": "ngtcp2-devel",
      "productUrl": "https://patchblox.com/security/product/linux/ngtcp2-devel",
      "release": "amzn 2023",
      "fixedVersion": "1.21.0-1.amzn2023.0.2",
      "supported": true
    },
    {
      "product": "ngtcp2-doc",
      "productUrl": "https://patchblox.com/security/product/linux/ngtcp2-doc",
      "release": "amzn 2023",
      "fixedVersion": "1.21.0-1.amzn2023.0.2",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-40170",
      "url": "https://patchblox.com/security/cve/CVE-2026-40170",
      "title": "ngtcp2: ngtcp2 is a C implementation of the IETF QUIC protocol",
      "priority": "High",
      "severity": "high",
      "cvss": 9,
      "epss": 0.00776,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "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"
  }
}