{
  "cveId": "CVE-2026-2291",
  "url": "https://patchblox.com/security/cve/CVE-2026-2291",
  "summary": "CVE-2026-2291 is fixed in 7 products on 1 platform, first by ALAS2023-2026-1516, released March 30, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "CVE-2026-2291",
  "description": "dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS.",
  "published": "2026-03-30T09:00:00Z",
  "severity": "Moderate",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00611,
  "epssPercentile": 0.49502,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-2291",
  "fixes": [
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "2.90-4~deb12u2",
      "fix": "DEBIAN-CVE-2026-2291",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-2291",
      "released": "2026-05-15T16:01:09Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "2.91-1\u002Bdeb13u1",
      "fix": "DEBIAN-CVE-2026-2291",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-2291",
      "released": "2026-05-15T16:01:09Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "Debian 14",
      "fixedVersion": "2.92-5",
      "fix": "DEBIAN-CVE-2026-2291",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-2291",
      "released": "2026-05-15T16:01:09Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "RHEL 10",
      "fixedVersion": "2.90-4.el10_0.1",
      "fix": "RHSA-2026:92677",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-92677",
      "released": "2026-05-27T17:40:12Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "RHEL 8",
      "fixedVersion": "0:2.79-36.el8_10",
      "fix": "RHSA-2026:20589",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-20589",
      "released": "2026-05-27T17:38:43Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "RHEL 9",
      "fixedVersion": "0:2.85-18.el9_8.1",
      "fix": "RHSA-2026:19373",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-19373",
      "released": "2026-05-27T17:40:12Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.90-0ubuntu0.18.04.1\u002Besm3",
      "fix": "dnsmasq 2.90-0ubuntu0.18.04.1\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-dnsmasq-2.90-0ubuntu0.18.04.1-esm3",
      "released": "2026-05-27T17:38:19Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.90-0ubuntu0.20.04.1\u002Besm2",
      "fix": "dnsmasq 2.90-0ubuntu0.20.04.1\u002Besm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-dnsmasq-2.90-0ubuntu0.20.04.1-esm2",
      "released": "2026-05-27T17:38:22Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.90-0ubuntu0.22.04.3",
      "fix": "dnsmasq 2.90-0ubuntu0.22.04.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dnsmasq-2.90-0ubuntu0.22.04.3",
      "released": "2026-05-27T17:38:24Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.90-2ubuntu0.3",
      "fix": "dnsmasq 2.90-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dnsmasq-2.90-2ubuntu0.3",
      "released": "2026-05-27T17:38:28Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "2.91-1ubuntu0.2",
      "fix": "dnsmasq 2.91-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dnsmasq-2.91-1ubuntu0.2",
      "released": "2026-05-27T17:38:31Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.92-1ubuntu0.2",
      "fix": "dnsmasq 2.92-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dnsmasq-2.92-1ubuntu0.2",
      "released": "2026-05-11T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "almalinux 10",
      "fixedVersion": "2.90-7.el10_2",
      "fix": "ALSA-2026:19158",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19158",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "almalinux 8",
      "fixedVersion": "2.79-36.el8_10",
      "fix": "ALSA-2026:20589",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-20589",
      "released": "2026-05-26T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "almalinux 9",
      "fixedVersion": "2.85-18.el9_8.1",
      "fix": "ALSA-2026:19373",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19373",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "amzn 2023",
      "fixedVersion": "2.90-1.amzn2023.0.2",
      "fix": "ALAS2023-2026-1516",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1516",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "ol 10",
      "fixedVersion": "0:2.90-7.el10_2",
      "fix": "ELSA-2026-19158",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-19158",
      "released": "2026-07-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "ol 8",
      "fixedVersion": "0:2.79-36.el8_10",
      "fix": "ELSA-2026-20589",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-20589",
      "released": "2026-05-26T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "ol 9",
      "fixedVersion": "0:2.85-18.el9_8.1",
      "fix": "ELSA-2026-19373",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-19373",
      "released": "2026-06-23T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.93-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21192-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21192-1",
      "released": "2026-06-29T07:41:58Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "rocky 10",
      "fixedVersion": "0:2.90-7.el10_2",
      "fix": "RLSA-2026:19158",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-19158",
      "released": "2026-05-29T16:03:24Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "rocky 8",
      "fixedVersion": "0:2.79-36.el8_10",
      "fix": "RLSA-2026:20589",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-20589",
      "released": "2026-05-29T00:00:29Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "rocky 9",
      "fixedVersion": "0:2.85-18.el9_8.1",
      "fix": "RLSA-2026:19373",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-19373",
      "released": "2026-05-28T15:43:06Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq",
      "release": "sles 16.0",
      "fixedVersion": "2.93-160000.1.1",
      "fix": "SUSE-SU-2026:22496-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22496-1",
      "released": "2026-06-29T07:42:51Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-base",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.90-0ubuntu0.18.04.1\u002Besm3",
      "fix": "dnsmasq-base 2.90-0ubuntu0.18.04.1\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-dnsmasq-base-2.90-0ubuntu0.18.04.1-esm3",
      "released": "2026-05-27T17:38:19Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-base",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.90-0ubuntu0.20.04.1\u002Besm2",
      "fix": "dnsmasq-base 2.90-0ubuntu0.20.04.1\u002Besm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-dnsmasq-base-2.90-0ubuntu0.20.04.1-esm2",
      "released": "2026-05-27T17:38:22Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-base",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.90-0ubuntu0.22.04.3",
      "fix": "dnsmasq-base 2.90-0ubuntu0.22.04.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dnsmasq-base-2.90-0ubuntu0.22.04.3",
      "released": "2026-05-27T17:38:24Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-base",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.90-2ubuntu0.3",
      "fix": "dnsmasq-base 2.90-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dnsmasq-base-2.90-2ubuntu0.3",
      "released": "2026-05-27T17:38:28Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-base",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "2.91-1ubuntu0.2",
      "fix": "dnsmasq-base 2.91-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dnsmasq-base-2.91-1ubuntu0.2",
      "released": "2026-05-27T17:38:31Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-base",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.92-1ubuntu0.2",
      "fix": "dnsmasq-base 2.92-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dnsmasq-base-2.92-1ubuntu0.2",
      "released": "2026-05-11T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-base-lua",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.90-0ubuntu0.18.04.1\u002Besm3",
      "fix": "dnsmasq-base-lua 2.90-0ubuntu0.18.04.1\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-dnsmasq-base-lua-2.90-0ubuntu0.18.04.1-esm3",
      "released": "2026-05-27T17:38:19Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-base-lua",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.90-0ubuntu0.20.04.1\u002Besm2",
      "fix": "dnsmasq-base-lua 2.90-0ubuntu0.20.04.1\u002Besm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-dnsmasq-base-lua-2.90-0ubuntu0.20.04.1-esm2",
      "released": "2026-05-27T17:38:22Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-base-lua",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.90-0ubuntu0.22.04.3",
      "fix": "dnsmasq-base-lua 2.90-0ubuntu0.22.04.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dnsmasq-base-lua-2.90-0ubuntu0.22.04.3",
      "released": "2026-05-27T17:38:24Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-base-lua",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.90-2ubuntu0.3",
      "fix": "dnsmasq-base-lua 2.90-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dnsmasq-base-lua-2.90-2ubuntu0.3",
      "released": "2026-05-27T17:38:28Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-base-lua",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "2.91-1ubuntu0.2",
      "fix": "dnsmasq-base-lua 2.91-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dnsmasq-base-lua-2.91-1ubuntu0.2",
      "released": "2026-05-27T17:38:31Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-base-lua",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.92-1ubuntu0.2",
      "fix": "dnsmasq-base-lua 2.92-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dnsmasq-base-lua-2.92-1ubuntu0.2",
      "released": "2026-05-11T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "2.90-1.amzn2023.0.2",
      "fix": "ALAS2023-2026-1516",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1516",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "2.90-1.amzn2023.0.2",
      "fix": "ALAS2023-2026-1516",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1516",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "RHEL 8",
      "fixedVersion": "0:2.79-36.el8_10",
      "fix": "RHSA-2026:20589",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-20589",
      "released": "2026-05-27T17:38:43Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "RHEL 9",
      "fixedVersion": "0:2.85-18.el9_8.1",
      "fix": "RHSA-2026:19373",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-19373",
      "released": "2026-05-27T17:40:12Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.90-0ubuntu0.18.04.1\u002Besm3",
      "fix": "dnsmasq-utils 2.90-0ubuntu0.18.04.1\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-dnsmasq-utils-2.90-0ubuntu0.18.04.1-esm3",
      "released": "2026-05-27T17:38:19Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.90-0ubuntu0.20.04.1\u002Besm2",
      "fix": "dnsmasq-utils 2.90-0ubuntu0.20.04.1\u002Besm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-dnsmasq-utils-2.90-0ubuntu0.20.04.1-esm2",
      "released": "2026-05-27T17:38:22Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-dnsmasq-utils-2.90-0ubuntu0.22.04.3",
      "released": "2026-05-27T17:38:24Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.90-2ubuntu0.3",
      "fix": "dnsmasq-utils 2.90-2ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-dnsmasq-utils-2.90-2ubuntu0.3",
      "released": "2026-05-27T17:38:28Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "Ubuntu 25.10 (questing)",
      "fixedVersion": "2.91-1ubuntu0.2",
      "fix": "dnsmasq-utils 2.91-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-questing-dnsmasq-utils-2.91-1ubuntu0.2",
      "released": "2026-05-27T17:38:31Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
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      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-dnsmasq-utils-2.92-1ubuntu0.2",
      "released": "2026-05-11T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "almalinux 10",
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      "fix": "ALSA-2026:19158",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19158",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "almalinux 8",
      "fixedVersion": "2.79-36.el8_10",
      "fix": "ALSA-2026:20589",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-20589",
      "released": "2026-05-26T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "almalinux 9",
      "fixedVersion": "2.85-18.el9_8.1",
      "fix": "ALSA-2026:19373",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-19373",
      "released": "2026-05-19T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "amzn 2023",
      "fixedVersion": "2.90-1.amzn2023.0.2",
      "fix": "ALAS2023-2026-1516",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1516",
      "released": "2026-03-30T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "ol 10",
      "fixedVersion": "0:2.90-7.el10_2",
      "fix": "ELSA-2026-19158",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-19158",
      "released": "2026-07-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "ol 8",
      "fixedVersion": "0:2.79-36.el8_10",
      "fix": "ELSA-2026-20589",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-20589",
      "released": "2026-05-26T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils",
      "release": "ol 9",
      "fixedVersion": "0:2.85-18.el9_8.1",
      "fix": "ELSA-2026-19373",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-19373",
      "released": "2026-06-23T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsmasq-utils-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "2.90-1.amzn2023.0.2",
      "fix": "ALAS2023-2026-1516",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-1516",
      "released": "2026-03-30T09:00:00Z"
    }
  ],
  "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"
  }
}