Is CVE-2023-50387 actively exploited?

CVE-2023-50387 has no public evidence of in-the-wild exploitation as of 2025-11-04.

What is the CVSS score for CVE-2023-50387?

CVE-2023-50387 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2023-50387?

Patch guidance is available from redhat security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-50387.

Fix CVE-2023-50387 - HIGH redhat enterprise linux

Q: Which products are affected by CVE-2023-50387?

21 products: redhat enterprise linux, redhat enterprise linux, redhat enterprise linux, redhat enterprise linux, microsoft windows server 2008, and 16 more.

Description

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-770 CWE-770

Metadata

Primary Vendor: REDHAT
Published: 2/14/2024
Last Modified: 11/4/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

redhat : enterprise_linuxredhat : enterprise_linuxredhat : enterprise_linuxredhat : enterprise_linuxmicrosoft : windows_server_2008microsoft : windows_server_2012microsoft : windows_server_2012microsoft : windows_server_2016microsoft : windows_server_2019microsoft : windows_server_2022microsoft : windows_server_2022_23h2fedoraproject : fedorathekelleys : dnsmasqnic : knot_resolverpowerdns : recursorpowerdns : recursorpowerdns : recursorisc : bindisc : bindisc : bindnlnetlabs : unbound

Remediation Guidance

Executive Summary

View on NIST NVD