CVE-2026-27831

rldns Vulnerable to Heap-based Out-of-Bounds Read

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.

Affected

bluedragonsecurity · rldns

CVSS v3.1 GITHUB

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.67% chance of exploitation in the next 30 days, 51st percentile

Published

2026-02-26

Updated

2026-02-27

Proof-of-concept exploits (2)

• bluedragonsecurity/CVE-2026-27831-POC5★ · 2026-02-26
• bluedragonsecurity/exploits2★ · 2026-10-07

References

• CVE Record
• NVD entry

Related

• CVE-2000-0359
• CVE-2002-0552
• CVE-2002-1120
• CVE-2002-1904
• CVE-2004-0397
• CVE-2005-0338