PT-2026-29247 · Powerdns · Dnsdist

Naoki Wakamatsu · Published 2026-01-01 · Updated 2026-04-24 · CVE-2026-27854

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions DNSdist (affected versions not specified)

Description An attacker may be able to trigger a use-after-free condition by sending specially crafted DNS queries to DNSdist when using custom Lua code. This occurs through the DNSQuestion:getEDNSOptions method. Specifically, DNSQuestion:getEDNSOptions might reference a modified version of the DNS packet, leading to a use-after-free and potentially causing a denial of service due to a crash.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-27854

OPENSUSE-SU-2026:10473-1

SUSE-SU-2026:1618-1

Affected Products

Dnsdist

References · 26

• https://osv.dev/vulnerability/SUSE-SU-2026:1618-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10473-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-27854 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-27854 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-27854 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-27854 · Vendor Advisory
• https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-27854 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27854 · Security Note
• https://bugzilla.suse.com/1261236 · Note
• https://bugzilla.suse.com/1261239 · Note
• https://suse.com/security/cve/CVE-2026-24029 · Note
• https://twitter.com/CVEnew/status/2039004463264895175 · Twitter Post
• https://suse.com/security/cve/CVE-2026-24030 · Note
• https://bugzilla.suse.com/1261237 · Note