CVE-2023-50387
Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote att…
Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.
- Vendor
- redhat
- Product
- enterprise linux
- CVSS 3.1
- 7.5 (high), scored by NVD (primary)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 3.1
- 7.5 (high), scored by 134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CWE
- CWE-770
- Published
- 2024-02-14
- NVD modified
- 2026-06-17
- NVD status
- Modified
Not in the CISA KEV catalogue at the last update.
EPSS
100% chance of exploitation in the next 30 days (percentile 99th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
References
- www.openwall.com (Mailing List)
- www.openwall.com (Mailing List)
- access.redhat.com (Third Party Advisory)
- bugzilla.suse.com (Issue Tracking)
- docs.powerdns.com (Third Party Advisory)
- gitlab.nic.cz (Patch)
- kb.isc.org (Third Party Advisory, VDB Entry)
- lists.debian.org
- lists.debian.org
- lists.fedoraproject.org
- lists.fedoraproject.org (Mailing List)
- lists.fedoraproject.org
Data last updated 18 Oct 2026. Sources: NVD API 2.0, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.