{
  "cveId": "CVE-2021-39537",
  "url": "https://patchblox.com/security/cve/CVE-2021-39537",
  "summary": "CVE-2021-39537 is fixed in 35 products on 1 platform, first by ALAS2023-2023-023, released February 17, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libncurses6: An issue was discovered in ncurses through v6.2-1",
  "description": "An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.",
  "published": "2021-09-20T09:15:00Z",
  "severity": "Negligible",
  "epss": 0.03243,
  "epssPercentile": 0.88386,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "lib32ncurses5",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "6.1-1ubuntu1.18.04.1",
      "fix": "lib32ncurses5 6.1-1ubuntu1.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-lib32ncurses5-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "lib32ncurses6",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.2-0ubuntu2.1",
      "fix": "lib32ncurses6 6.2-0ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-lib32ncurses6-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "lib32ncursesw5",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "6.1-1ubuntu1.18.04.1",
      "fix": "lib32ncursesw5 6.1-1ubuntu1.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-lib32ncursesw5-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "lib32ncursesw6",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.2-0ubuntu2.1",
      "fix": "lib32ncursesw6 6.2-0ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-lib32ncursesw6-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
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      "product": "lib32tinfo5",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "6.1-1ubuntu1.18.04.1",
      "fix": "lib32tinfo5 6.1-1ubuntu1.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-lib32tinfo5-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "lib32tinfo6",
      "release": "Ubuntu 20.04 LTS (focal)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-lib32tinfo6-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
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      "product": "lib64ncurses5",
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      "fixedVersion": "6.1-1ubuntu1.18.04.1",
      "fix": "lib64ncurses5 6.1-1ubuntu1.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-lib64ncurses5-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "lib64ncurses6",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "6.2-0ubuntu2.1",
      "fix": "lib64ncurses6 6.2-0ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-lib64ncurses6-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
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      "product": "lib64ncursesw6",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-lib64ncursesw6-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
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      "product": "lib64tinfo5",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-lib64tinfo5-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "lib64tinfo6",
      "release": "Ubuntu 20.04 LTS (focal)",
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      "fix": "lib64tinfo6 6.2-0ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-lib64tinfo6-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
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      "product": "libncurses5",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
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      "fix": "libncurses5 6.1-1ubuntu1.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libncurses5-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libncurses5",
      "release": "Ubuntu 20.04 LTS (focal)",
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      "released": "2023-04-13T18:15:00Z"
    },
    {
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      "product": "libncurses6",
      "release": "Ubuntu 20.04 LTS (focal)",
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      "fix": "libncurses6 6.2-0ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libncurses6-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libncursesw5",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
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      "fix": "libncursesw5 6.1-1ubuntu1.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libncursesw5-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libncursesw5",
      "release": "Ubuntu 20.04 LTS (focal)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libncursesw5-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libncursesw6",
      "release": "Ubuntu 20.04 LTS (focal)",
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      "fix": "libncursesw6 6.2-0ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libncursesw6-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libtinfo5",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
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      "fix": "libtinfo5 6.1-1ubuntu1.18.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libtinfo5-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libtinfo5",
      "release": "Ubuntu 20.04 LTS (focal)",
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      "fix": "libtinfo5 6.2-0ubuntu2.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libtinfo5-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libtinfo6",
      "release": "Ubuntu 20.04 LTS (focal)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libtinfo6-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libx32ncurses5",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libx32ncurses5-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libx32ncursesw5",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "6.1-1ubuntu1.18.04.1",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libx32ncursesw5-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libx32tinfo5",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "6.1-1ubuntu1.18.04.1",
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    {
      "platform": "linux",
      "product": "ncurses",
      "release": "amzn 2023",
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      "fix": "ALAS2023-2023-023",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-ncurses-base-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
      "product": "ncurses-base",
      "release": "Ubuntu 20.04 LTS (focal)",
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    },
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      "platform": "linux",
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    {
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      "fix": "ALAS2023-2023-023",
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      "released": "2023-02-17T20:43:00Z"
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      "released": "2023-02-17T20:43:00Z"
    },
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      "fix": "ALAS2023-2023-023",
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      "released": "2023-02-17T20:43:00Z"
    },
    {
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      "fix": "ALAS2023-2023-023",
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      "released": "2023-02-17T20:43:00Z"
    },
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      "released": "2023-02-17T20:43:00Z"
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      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-023",
      "released": "2023-02-17T20:43:00Z"
    },
    {
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-ncurses-examples-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-ncurses-examples-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
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      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-023",
      "released": "2023-02-17T20:43:00Z"
    },
    {
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      "fix": "ALAS2023-2023-023",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-023",
      "released": "2023-02-17T20:43:00Z"
    },
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      "fix": "ALAS2023-2023-023",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-023",
      "released": "2023-02-17T20:43:00Z"
    },
    {
      "platform": "linux",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-ncurses-term-6.1-1ubuntu1.18.04.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
      "platform": "linux",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-ncurses-term-6.2-0ubuntu2.1",
      "released": "2023-04-13T18:15:00Z"
    },
    {
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      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-023",
      "released": "2023-02-17T20:43:00Z"
    }
  ],
  "noFixYet": [],
  "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"
  }
}