QwikSec

Security Database

CVE

CWE

Training

CVE Database
/

CVE-2026-27854

Back to search

CVE-2026-27854

Published: Mar 31, 2026

Modified: Apr 2, 2026

PUBLISHED

CVSS v3.1

4.8

MEDIUM

Description

An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases DNSQuestion:getEDNSOptions might refer to a version of the DNS packet that has been modified, thus triggering a use-after-free and potentially a crash resulting in denial of service.

VendorProductVersions

PowerDNS

DNSdist

affected
1.9.0 - < 1.9.12
affected
2.0.0 - < 2.0.3

CVSS v3.1 Details

CVSS v3.1 Vector

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

References

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Start Training

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.

Scan Now