CVE-2026-27831 - Vulnerability Analysis

Overview

rldns 2.3 contains a heap-based out-of-bounds read in the DNS server component, letting attackers cause denial of service, exploit requires no special privileges.

Severity & Score

Impact

Attackers can cause denial of service by triggering a heap-based out-of-bounds read.

Mitigation

Update to version 1.4 or later.

References

• https://github.com/bluedragonsecurity/rldns-1.3-heap-out-of-bounds-vulnerability-fixed-in-rldns-1.4
• https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4
• https://github.com/bluedragonsecurity/rldns_archives/blob/main/diff/rldns-1.4.diff
• https://medium.com/@w1sdom/heap-based-buffer-over-read-vulnerability-in-rldns-1-3-5da3bccdc031

Related Resources

• Vulnerability Intelligence Dashboard
• Credential Scanner