PT-2026-29247 · Powerdns · Dnsdist

Naoki Wakamatsu · Published 2026-03-31 · Updated 2026-03-31 · CVE-2026-27854

NVD

CVSS v3.1

4.8

Medium

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

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.

Fix

Related Identifiers

CVE-2026-27854

Affected Products

Dnsdist

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-27854 · Security Note
• https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html · Note