PT-2026-42154 · Isc+3 · Bind 9+3

Published 2026-05-17 · Updated 2026-05-28 · CVE-2026-3039

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 BIND 9 versions 9.0.0 through 9.16.50 BIND 9 versions 9.18.0 through 9.18.48 BIND 9 versions 9.20.0 through 9.20.22 BIND 9 versions 9.21.0 through 9.21.21 BIND 9 versions 9.9.3-S1 through 9.16.50-S1 BIND 9 versions 9.18.11-S1 through 9.18.48-S1 BIND 9 versions 9.20.9-S1 through 9.20.22-S1

Description Servers configured to use TKEY-based authentication via GSS-API tokens are subject to excessive memory consumption when processing maliciously-constructed packets. This issue typically occurs in Kerberos-secured DNS environments or Active Directory integrated DNS deployments during GSS-API TKEY negotiation.

Recommendations Update versions 9.0.0 through 9.16.50 to a version newer than 9.16.50. Update versions 9.18.0 through 9.18.48 to a version newer than 9.18.48. Update versions 9.20.0 through 9.20.22 to a version newer than 9.20.22. Update versions 9.21.0 through 9.21.21 to a version newer than 9.21.21. Update versions 9.9.3-S1 through 9.16.50-S1 to a version newer than 9.16.50-S1. Update versions 9.18.11-S1 through 9.18.48-S1 to a version newer than 9.18.48-S1. Update versions 9.20.9-S1 through 9.20.22-S1 to a version newer than 9.20.22-S1.

Fix

Weakness Enumeration

CWE-771

Related Identifiers

CVE-2026-3039

ECHO-EA81-22AA-6506

OPENSUSE-SU-2026:10874-1

RHSA-2026:20334

USN-8293-1

Affected Products

Bind 9

Bind Server

Linuxmint

Ubuntu

References · 29

• https://kb.isc.org/docs/cve-2026-3039 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10874-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-3039 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-5947 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-5950 · Vendor Advisory
• https://downloads.isc.org/isc/bind9/9.21.22 · Patch
• https://ubuntu.com/security/CVE-2026-3592 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-3039 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-5946 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-3039 · Security Note
• https://ubuntu.com/security/notices/USN-8293-1 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-3039 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-3039 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-3039 · Security Note
• https://downloads.isc.org/isc/bind9/9.20.23 · Patch