PT-2026-42154 · Isc+4 · Bind 9+4

CVE-2026-3039 · Published 2026-05-13 · Updated 2026-07-06

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

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

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-771

CWE-770

Related Identifiers

ALSA-2026:23360

ALSA-2026:24338

ALSA-2026:24339

ALSA-2026:24367

ALSA-2026:24368

BDU:2026-08888

CLSA-2026-1780406874

CVE-2026-3039

ECHO-EA81-22AA-6506

OESA-2026-2655

OESA-2026-2656

OPENSUSE-SU-2026:10874-1

OPENSUSE-SU-2026:21123-1

RHSA-2026:20334

RHSA-2026:23360

RHSA-2026:24338

RHSA-2026:24339

RHSA-2026:24367

RHSA-2026:24368

SUSE-SU-2026:22198-1

SUSE-SU-2026:2289-1

SUSE-SU-2026:2616-1

SUSE-SU-2026:2617-1

SUSE-SU-2026:2673-1

SUSE-SU-2026:2676-1

SUSE-SU-2026:2779-1

USN-8293-1

Affected Products

Bind 9

Bind Server

Linuxmint

Rocky Linux

Ubuntu

References · 104

• https://errata.almalinux.org/8/ALSA-2026-24339.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-3039 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-3039 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-5946 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:22198-1 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8293-1 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2656 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2026-24368.html · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:24338 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/732290 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2655 · Vendor Advisory
• https://errata.rockylinux.org/RLSA-2026:24368 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8293-1 · Vendor Advisory
• https://kb.isc.org/docs/cve-2026-3039 · Vendor Advisory
• https://downloads.isc.org/isc/bind9/9.20.23 · Patch