Vulnerability Description
rldns is an open source DNS server. Version 1.3 has a heap-based out-of-bounds read that leads to denial of service. Version 1.4 contains a patch for the issue.
CVSS Score
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Related Weaknesses (CWE)
References
- https://github.com/bluedragonsecurity/rldns-1.3-heap-out-of-bounds-vulnerability
- https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g
- https://github.com/bluedragonsecurity/rldns_archives/blob/main/diff/rldns-1.4.di
- https://medium.com/@w1sdom/heap-based-buffer-over-read-vulnerability-in-rldns-1-
- https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g
FAQ
What is CVE-2026-27831?
CVE-2026-27831 is a vulnerability with a CVSS score of 7.5 (HIGH). rldns is an open source DNS server. Version 1.3 has a heap-based out-of-bounds read that leads to denial of service. Version 1.4 contains a patch for the issue.
How severe is CVE-2026-27831?
CVE-2026-27831 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-27831?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.