{
  "cveId": "CVE-2026-33630",
  "url": "https://patchblox.com/security/cve/CVE-2026-33630",
  "summary": "CVE-2026-33630 is fixed in 26 products on 1 platform, first by FEDORA-2026-D70D93FCD7, released July 10, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "c-ares : Use-after-free / double-free in c-ares query-completion handling, remotely triggerable via ares_getaddrinfo() over TCP",
  "description": "c-ares is an asynchronous resolver library. From ver 1.32.3 until 1.34.7, a use-after-free / double-free in c-ares\u0027 query-completion handling. The same flaw \u2014 a query\u0027s callback being invoked while the query is still linked in the channel\u0027s internal lookup structures \u2014 is present at multiple points in the resend/finish path (timeout handling, response handling, and query dispatch). If the query, or for ares_getaddrinfo() the owning host_query, is freed as a side effect of that callback, it is then accessed and/or freed a second time. This vulnerability is fixed in ver 1.34.7.",
  "published": "2026-07-07T00:00:00Z",
  "severity": "Important",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "Double Free",
  "epss": 0.00845,
  "epssPercentile": 0.58223,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33630",
  "fixes": [
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "Debian 14",
      "fixedVersion": "1.34.7-1",
      "fix": "DEBIAN-CVE-2026-33630",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33630",
      "released": "2026-07-10T15:54:09Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "Fedora 43",
      "fixedVersion": "1.34.8-1.fc43",
      "fix": "FEDORA-2026-D70D93FCD7",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-d70d93fcd7",
      "released": "2026-07-10T15:20:50Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "RHEL 10",
      "fixedVersion": "1.34.6-2.el10_2",
      "fix": "RHSA-2026:42096",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-42096",
      "released": "2026-07-21T13:09:01Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "almalinux 10",
      "fixedVersion": "1.34.6-2.el10_2",
      "fix": "ALSA-2026:42096",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-42096",
      "released": "2026-07-20T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "ol 10",
      "fixedVersion": "0:1.34.6-2.el10_2",
      "fix": "ELSA-2026-42096",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-42096",
      "released": "2026-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.34.8-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21721-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21721-1",
      "released": "2026-09-01T15:48:33Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "rocky 10",
      "fixedVersion": "0:1.34.6-2.el10_2",
      "fix": "RLSA-2026:42096",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-42096",
      "released": "2026-07-22T12:05:54Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "sles 15.6",
      "fixedVersion": "1.34.8-150000.3.29.1",
      "fix": "SUSE-SU-2026:4021-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4021-1",
      "released": "2026-09-07T07:42:20Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "sles 15.7",
      "fixedVersion": "1.34.8-150000.3.29.1",
      "fix": "SUSE-SU-2026:4021-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4021-1",
      "released": "2026-09-07T07:42:20Z"
    },
    {
      "platform": "linux",
      "product": "c-ares",
      "release": "sles 16.0",
      "fixedVersion": "1.34.8-160000.1.1",
      "fix": "SUSE-SU-2026:23597-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-23597-1",
      "released": "2026-09-01T15:51:00Z"
    },
    {
      "platform": "linux",
      "product": "c-ares-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "1.34.8-1.fc43",
      "fix": "FEDORA-2026-D70D93FCD7",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-d70d93fcd7",
      "released": "2026-07-10T15:20:50Z"
    },
    {
      "platform": "linux",
      "product": "c-ares-debugsource",
      "release": "Fedora 43",
      "fixedVersion": "1.34.8-1.fc43",
      "fix": "FEDORA-2026-D70D93FCD7",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-d70d93fcd7",
      "released": "2026-07-10T15:20:50Z"
    },
    {
      "platform": "linux",
      "product": "c-ares-devel",
      "release": "Fedora 43",
      "fixedVersion": "1.34.8-1.fc43",
      "fix": "FEDORA-2026-D70D93FCD7",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-d70d93fcd7",
      "released": "2026-07-10T15:20:50Z"
    },
    {
      "platform": "linux",
      "product": "c-ares-devel",
      "release": "almalinux 10",
      "fixedVersion": "1.34.6-2.el10_2",
      "fix": "ALSA-2026:42096",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-42096",
      "released": "2026-07-20T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "c-ares-devel",
      "release": "ol 10",
      "fixedVersion": "0:1.34.6-2.el10_2",
      "fix": "ELSA-2026-42096",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-42096",
      "released": "2026-07-21T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libc-ares2",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1.34.6-1ubuntu0.1",
      "fix": "libc-ares2 1.34.6-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libc-ares2-1.34.6-1ubuntu0.1",
      "released": "2026-09-03T12:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libcares2",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1.34.6-1ubuntu0.1",
      "fix": "libcares2 1.34.6-1ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libcares2-1.34.6-1ubuntu0.1",
      "released": "2026-09-03T12:17:00Z"
    },
    {
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      "product": "nodejs22",
      "release": "amzn 2023",
      "fixedVersion": "1:22.23.1-1.amzn2023.0.2",
      "fix": "ALAS2023-2026-1981",
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      "released": "2026-07-20T09:00:00Z"
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  ],
  "noFixYet": [],
  "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"
  }
}