{
  "cveId": "CVE-2026-22693",
  "url": "https://patchblox.com/security/cve/CVE-2026-22693",
  "summary": "CVE-2026-22693 is fixed in 22 products on 1 platform, first by DEBIAN-CVE-2026-22693, released January 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Null Pointer Dereference in SubtableUnicodesCache::create leading to DoS",
  "description": "HarfBuzz is a text shaping engine. Prior to version 12.3.0, a null pointer dereference vulnerability exists in the SubtableUnicodesCache::create function located in src/hb-ot-cmap-table.hh. The function fails to check if hb_malloc returns NULL before using placement new to construct an object at the returned pointer address. When hb_malloc fails to allocate memory (which can occur in low-memory conditions or when using custom allocators that simulate allocation failures), it returns NULL. The code then attempts to call the constructor on this null pointer using placement new syntax, resulting in undefined behavior and a Segmentation Fault. This issue has been patched in version 12.3.0.",
  "published": "2026-01-10T06:15:52Z",
  "severity": "Moderate",
  "cvss": 5.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
  "cwe": "NULL Pointer Dereference",
  "epss": 0.00452,
  "epssPercentile": 0.39477,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-22693",
  "fixes": [
    {
      "platform": "linux",
      "product": "firefox",
      "release": "amzn 2023",
      "fixedVersion": "140.7.0-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1435",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1435",
      "released": "2026-02-16T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "140.7.0-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1435",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1435",
      "released": "2026-02-16T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "140.7.0-1.amzn2023.0.3",
      "fix": "ALAS2023-2026-1435",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1435",
      "released": "2026-02-16T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "10.2.0-1\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-22693",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-22693",
      "released": "2026-01-10T06:15:52Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz",
      "release": "Debian 14",
      "fixedVersion": "12.3.0-4",
      "fix": "DEBIAN-CVE-2026-22693",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-22693",
      "released": "2026-01-10T06:15:52Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-B38FE572EF",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-b38fe572ef",
      "released": "2026-01-14T12:43:13Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz",
      "release": "opensuse-leap 15.6",
      "fixedVersion": "8.3.0-150600.3.3.1",
      "fix": "SUSE-SU-2026:0287-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-0287-1",
      "released": "2026-01-23T23:35:49Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "11.4.5-160000.1.1",
      "fix": "OPENSUSE-SU-2026:20409-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20409-1",
      "released": "2026-03-20T15:26:24Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz",
      "release": "sles 15.7",
      "fixedVersion": "8.3.0-150600.3.3.1",
      "fix": "SUSE-SU-2026:0287-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-0287-1",
      "released": "2026-01-23T23:35:49Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz",
      "release": "sles 16.0",
      "fixedVersion": "11.4.5-160000.1.1",
      "fix": "SUSE-SU-2026:20922-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-20922-1",
      "released": "2026-03-20T15:24:11Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz-cairo",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-B38FE572EF",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-b38fe572ef",
      "released": "2026-01-14T12:43:13Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz-cairo-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-B38FE572EF",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-b38fe572ef",
      "released": "2026-01-14T12:43:13Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-B38FE572EF",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-b38fe572ef",
      "released": "2026-01-14T12:43:13Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz-debugsource",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-B38FE572EF",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-b38fe572ef",
      "released": "2026-01-14T12:43:13Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz-devel",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-B38FE572EF",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-b38fe572ef",
      "released": "2026-01-14T12:43:13Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz-devel-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-B38FE572EF",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-b38fe572ef",
      "released": "2026-01-14T12:43:13Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz-icu",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-B38FE572EF",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-b38fe572ef",
      "released": "2026-01-14T12:43:13Z"
    },
    {
      "platform": "linux",
      "product": "harfbuzz-icu-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-B38FE572EF",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-b38fe572ef",
      "released": "2026-01-14T12:43:13Z"
    },
    {
      "platform": "linux",
      "product": "mingw-harfbuzz",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-DC77EB63AE",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-dc77eb63ae",
      "released": "2026-01-17T10:12:05Z"
    },
    {
      "platform": "linux",
      "product": "mingw32-harfbuzz",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-DC77EB63AE",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-dc77eb63ae",
      "released": "2026-01-17T10:12:05Z"
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      "product": "mingw32-harfbuzz-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-DC77EB63AE",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-dc77eb63ae",
      "released": "2026-01-17T10:12:05Z"
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    {
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      "product": "mingw32-harfbuzz-static",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-DC77EB63AE",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-dc77eb63ae",
      "released": "2026-01-17T10:12:05Z"
    },
    {
      "platform": "linux",
      "product": "mingw64-harfbuzz",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-DC77EB63AE",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-dc77eb63ae",
      "released": "2026-01-17T10:12:05Z"
    },
    {
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      "product": "mingw64-harfbuzz-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-DC77EB63AE",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-dc77eb63ae",
      "released": "2026-01-17T10:12:05Z"
    },
    {
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      "release": "Fedora 43",
      "fixedVersion": "11.5.1-2.fc43",
      "fix": "FEDORA-2026-DC77EB63AE",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-dc77eb63ae",
      "released": "2026-01-17T10:12:05Z"
    },
    {
      "platform": "linux",
      "product": "perl-HarfBuzz-Shaper",
      "release": "Fedora 43",
      "fixedVersion": "0.033-2.fc43",
      "fix": "FEDORA-2026-2B5249B4B6",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-2b5249b4b6",
      "released": "2026-01-20T06:42:27Z"
    },
    {
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      "product": "perl-HarfBuzz-Shaper-debuginfo",
      "release": "Fedora 43",
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      "fix": "FEDORA-2026-2B5249B4B6",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-2b5249b4b6",
      "released": "2026-01-20T06:42:27Z"
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    {
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      "release": "Fedora 43",
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      "fix": "FEDORA-2026-2B5249B4B6",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-2b5249b4b6",
      "released": "2026-01-20T06:42:27Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}