PT-2026-29246 · Powerdns · Dnsdist

Ilya Rozentsvaig · Published 2026-01-01 · Updated 2026-04-24 · CVE-2026-27853

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 could trigger an out-of-bounds write by sending crafted DNS responses to DNSdist. This is possible when utilizing the DNSQuestion:changeName or DNSResponse:changeName methods within custom Lua code. Rewritten packets may exceed the initial response size, potentially reaching over 65535 bytes, which could lead to a crash and denial of service. The vulnerability involves manipulating DNS packets through the DNSQuestion:changeName and DNSResponse:changeName methods.

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

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-27853

SUSE-SU-2026:1618-1

Affected Products

Dnsdist

References · 25

• https://security-tracker.debian.org/tracker/CVE-2026-27853 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27853 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:1618-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-27853 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-27853 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-27853 · Vendor Advisory
• https://dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-27853 · Security Note
• https://bugzilla.suse.com/1261236 · Note
• https://bugzilla.suse.com/1261239 · Note
• https://suse.com/security/cve/CVE-2026-24029 · Note
• https://suse.com/security/cve/CVE-2026-24030 · Note
• https://bugzilla.suse.com/1261237 · Note
• https://suse.com/security/cve/CVE-2026-24028 · Note
• https://suse.com/security/cve/CVE-2026-0396 · Note