GHSA-57VP-FFX7-7GM6

Vulnerability from github – Published: 2026-05-11 18:31 – Updated: 2026-06-30 03:36
VLAI
Details

A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.

Severity
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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{
  "affected": [],
  "aliases": [
    "CVE-2026-5172"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-11T18:16:41Z",
    "severity": "HIGH"
  },
  "details": "A buffer overflow in dnsmasq\u2019s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record\u2019s end.",
  "id": "GHSA-57vp-ffx7-7gm6",
  "modified": "2026-06-30T03:36:37Z",
  "published": "2026-05-11T18:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5172"
    },
    {
      "type": "WEB",
      "url": "https://github.com/NixOS/nixpkgs/pull/519082"
    },
    {
      "type": "WEB",
      "url": "https://github.com/NixOS/nixpkgs/pull/519093"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2026:19158"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-5172"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2458521"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pi-hole/FTL/releases/tag/v6.6.2"
    },
    {
      "type": "WEB",
      "url": "https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html"
    },
    {
      "type": "WEB",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5172.json"
    },
    {
      "type": "WEB",
      "url": "https://thekelleys.org.uk/dnsmasq"
    },
    {
      "type": "WEB",
      "url": "https://thekelleys.org.uk/dnsmasq/CVE"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/471747"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}



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