CVE-2026-27831

7.5 HIGH

Published: February 26, 2026 Modified: February 27, 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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://github.com/bluedragonsecurity/rldns-1.3-heap-out-of-bounds-vulnerability-fixed-in-rldns-1.4

Source: security-advisories@github.com

https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4

Source: security-advisories@github.com

https://github.com/bluedragonsecurity/rldns_archives/blob/main/diff/rldns-1.4.diff

Source: security-advisories@github.com

https://medium.com/@w1sdom/heap-based-buffer-over-read-vulnerability-in-rldns-1-3-5da3bccdc031

Source: security-advisories@github.com

https://github.com/bluedragonsecurity/rldns/security/advisories/GHSA-fv38-45j4-g9x4

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

5 reference(s) from NVD

Quick Stats

CVSS v3 Score

7.5 / 10.0

EPSS (Exploit Probability)

0.1%

17th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-125

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