CVE-2026-27831
HIGHCVSS 7.5/10EPSS 0.43%
Last modified
CVE-2026-27831 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. rldns is an open source DNS server. Version 1.3 has a heap-based out-of-bounds read that leads to denial of service. EPSS estimates a 0.43% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-27831?
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 a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.
How do I fix CVE-2026-27831?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2026-27831?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST