CVE-2026-12244

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Source
https://cve.org/CVERecord?id=CVE-2026-12244
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12244.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-12244
Downstream
Published
2026-06-25T07:16:44.900Z
Modified
2026-07-15T06:21:52.850500Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

If NSD is configured as secondary for a zone, the primary of that zone can crash NSD with an AXFR containing a DNS message with a special crafted SVCB RR with an rdata size of 65512, that let's an (uint16_t) variable that is used to allocate space needed for the RR wrap (because total size > 65535), causing a heap overflow. The attacker can perform a controlled (RCE class) head write of up to 65509 bytes

References

Affected packages

Git / github.com/nlnetlabs/nsd

Affected ranges

Type
GIT
Repo
https://github.com/nlnetlabs/nsd
Events
Introduced
5c760d0f00e282e1626cbadfc67e8bb11744f20b
Fixed
fc930b88cb4f628defae9835449065945bda7ddc
Database specific 
{
    "cpe": "cpe:2.3:a:nlnetlabs:nsd:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "4.14.0"
        },
        {
            "fixed": "4.14.3"
        }
    ],
    "source": "CPE_RANGE"
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12244.json"