CVE-2026-27831
rldns Vulnerable to Heap-based Out-of-Bounds Read
- State
- Published
- Severity
- 7.5 High
- Published
- Feb 26, 2026
- Updated
- Feb 27, 2026
- Reserved
- Feb 24, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
Weaknesses
- CWE-125 Out-of-bounds Read
Affected Products
| Product | Versions |
|---|---|
rldnsbluedragonsecurity |
|
References
- https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4
- https://github.com/bluedragonsecurity/rldns-1.3-heap-out-of-bounds-vulnerability-fixed-in-rldns-1.4
- 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
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