Dnsmasq: dnsmasq: out-of-bounds read in find_soa() due to missing extrabytes validation_CVE-2026-12969

{
    "lastseen": "",
    "description": "An out-of-bounds read vulnerability exists in dnsmasq's find_soa() function in src/rfc1035.c. When parsing NS section records, extract_name() is called with extrabytes=0, failing to validate that 10 additional bytes exist for fixed-length DNS record fields. A remote attacker controlling a DNS zone can exploit this via a crafted NXDOMAIN response to cause a 10-byte heap out-of-bounds read, potentially accessing stale data from prior transactions.",
    "published": "2026-06-23T13:28:56.732Z",
    "modified": "2026-06-23T15:04:49.622Z",
    "type": "cve",
    "title": "Dnsmasq: dnsmasq: out-of-bounds read in find_soa() due to missing extrabytes validation",
    "source": "redhat",
    "references": "https://access.redhat.com/security/cve/CVE-2026-12969\nhttps://bugzilla.redhat.com/show_bug.cgi?id=2491663",
    "id": "CVE-2026-12969",
    "bulletinFamily": "",
    "cwe": [
        "CWE-125"
    ],
    "cvelist": null,
    "sourceData": "",
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    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
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        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Red Hat Enterprise Linux 10",
    "version": "",
    "vendor": "Red Hat",
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}