{
  "fix": "ALAS2023-2023-020",
  "url": "https://patchblox.com/security/fix/linux/alas2023-2023-020",
  "summary": "ALAS2023-2023-020, released February 17, 2023, fixes 10 CVEs across 24 products. None of them is reported as exploited. Patch Radar priority: Urgent.",
  "platform": "linux",
  "type": "advisory",
  "title": "Security update for 24 packages",
  "released": "2023-02-17T20:43:00Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2022-3775, rated Critical",
  "supported": true,
  "cveCount": 10,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01273,
  "maxCvss": 8.6,
  "vendorAdvisory": "https://alas.aws.amazon.com/AL2023/ALAS-2023-020.html",
  "appliesTo": [
    {
      "product": "grub2-common",
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      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-debuginfo",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-debugsource",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-efi-aa64",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-efi-aa64",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-efi-aa64-cdboot",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-efi-aa64-cdboot",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-efi-aa64-ec2",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-efi-aa64-ec2",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-efi-aa64-modules",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-efi-aa64-modules",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-efi-x64",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-efi-x64",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-efi-x64-cdboot",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-efi-x64-cdboot",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-efi-x64-ec2",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-efi-x64-ec2",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-efi-x64-modules",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-efi-x64-modules",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-emu",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-emu",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-emu-debuginfo",
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      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-emu-modules",
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      "release": "amzn 2023",
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      "supported": true
    },
    {
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      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-pc-modules",
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      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-tools",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-tools",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-tools-debuginfo",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-tools-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-tools-efi",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-tools-efi",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-tools-efi-debuginfo",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-tools-efi-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-tools-extra",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-tools-extra",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-tools-extra-debuginfo",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-tools-extra-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-tools-minimal",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-tools-minimal",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    },
    {
      "product": "grub2-tools-minimal-debuginfo",
      "productUrl": "https://patchblox.com/security/product/linux/grub2-tools-minimal-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "1:2.06-61.amzn2023.0.3",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2022-3775",
      "url": "https://patchblox.com/security/cve/CVE-2022-3775",
      "title": "Redhat: CVE-2022-3775 grub2 - Heap based out-of-bounds write when rendering certain Unicode sequences",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 8.2,
      "epss": 0.01044,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-28733",
      "url": "https://patchblox.com/security/cve/CVE-2022-28733",
      "title": "grub-efi-amd64: Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in gru...",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.1,
      "epss": 0.01273,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-28734",
      "url": "https://patchblox.com/security/cve/CVE-2022-28734",
      "title": "grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable...",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.1,
      "epss": 0.01121,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-2601",
      "url": "https://patchblox.com/security/cve/CVE-2022-2601",
      "title": "Redhat: CVE-2022-2601 grub2 - Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.6,
      "epss": 0.00515,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-3696",
      "url": "https://patchblox.com/security/cve/CVE-2021-3696",
      "title": "grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable...",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.1,
      "epss": 0.00484,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-3695",
      "url": "https://patchblox.com/security/cve/CVE-2021-3695",
      "title": "grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable...",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.1,
      "epss": 0.00475,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-3697",
      "url": "https://patchblox.com/security/cve/CVE-2021-3697",
      "title": "grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable...",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.1,
      "epss": 0.00469,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-28735",
      "url": "https://patchblox.com/security/cve/CVE-2022-28735",
      "title": "grub-efi-arm64: The GRUB2\u0027s shim_lock verifier allows non-kernel files to be loaded on shim-powered secure boot systems",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.1,
      "epss": 0.00316,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2022-28736",
      "url": "https://patchblox.com/security/cve/CVE-2022-28736",
      "title": "grub-efi-arm64: There\u0027s a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up...",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.1,
      "epss": 0.00286,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-3981",
      "url": "https://patchblox.com/security/cve/CVE-2021-3981",
      "title": "grub2-common: The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable...",
      "priority": "Routine",
      "severity": "low",
      "cvss": 3.3,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}