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CVE-2026-27854

nvd nist
Published: Mar 31, 2026Modified: Apr 14, 2026

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7.5
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 3.9 / Impact: 3.6
Source: NVD

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.

Affected (2)

Products: Powerdns: Dnsdist
Powerdns
1 product
Dnsdist
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Powerdns
Dnsdist
From 1.9.0 to 1.9.12
Dnsdist
From 2.0.0 to 2.0.3

Related CWEs

CWE-416
Use After Free
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (1)

Source: security@open-xchange.com
Vendor Advisory

Timeline

No history available yet.