Vulnerability Description
In some circumstances, when DNSdist is configured to use the nghttp2 library to process incoming DNS over HTTPS queries, an attacker might be able to cause a denial of service by crafting a DoH exchange that triggers an unbounded I/O read loop, causing an unexpected consumption of CPU resources.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2025-0
- http://www.openwall.com/lists/oss-security/2025/09/18/1
FAQ
What is CVE-2025-30187?
CVE-2025-30187 is a vulnerability with a CVSS score of 3.7 (LOW). In some circumstances, when DNSdist is configured to use the nghttp2 library to process incoming DNS over HTTPS queries, an attacker might be able to cause a denial of service by crafting a DoH exchan...
How severe is CVE-2025-30187?
CVE-2025-30187 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-30187?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.