Upstream information

CVE-2026-44690 at MITRE

Description

In NLnet Labs Unbound 1.7.0 up to and including 1.25.1, insufficient validation of the RRSIG.Labels field combined with premature cache writes during RFC 8198 aggressive NSEC processing leads to cache poisoning that permits a malicious actor controlling a single delegated zone to poison arbitrary sibling zones under NSEC-signed parent domains. A malicious actor with one registered domain under an NSEC-signed TLD can serve malicious insecure DNS responses for unrelated sibling domains (sharing the same parent zone). Arbitrary delegations that do not exist under the parent domain and are covered by the parent's NSEC chain can be brought into insecure existence by fraudulent wildcard DS records (less labels than expected, unknown algorithm) from the malicious sibling domain. This allows the malicious actor to inject insecure wildcard records for those delegations.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (NLnet Labs) SUSE
Base Score 7.5 7.5
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network Network
Attack Complexity Low Low
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None High
Integrity Impact High None
Availability Impact None None
CVSSv3 Version 3.1 3.1
CVSS v4 Scores
CVSS detail SUSE
Base Score 8.7
Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Attack Vector Network
Attack Complexity Low
Attack Requirements None
Privileges Required None
User Interaction None
Vulnerable System Confidentiality Impact High
Vulnerable System Integrity Impact None
Vulnerable System Availability Impact None
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact None
Subsequent System Availability Impact None
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1271877 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Liberty Linux 10
  • python3-unbound >= 1.24.2-7.el10_2.4
  • unbound >= 1.24.2-7.el10_2.4
  • unbound-anchor >= 1.24.2-7.el10_2.4
  • unbound-devel >= 1.24.2-7.el10_2.4
  • unbound-dracut >= 1.24.2-7.el10_2.4
  • unbound-libs >= 1.24.2-7.el10_2.4
  • unbound-utils >= 1.24.2-7.el10_2.4
 Patchnames:
RHSA-2026:55892 (x86_64)
SUSE Liberty Linux 8
  • python3-unbound >= 1.16.2-5.14.el8_10
  • unbound >= 1.16.2-5.14.el8_10
  • unbound-devel >= 1.16.2-5.14.el8_10
  • unbound-libs >= 1.16.2-5.14.el8_10
 Patchnames:
RHSA-2026:55784 (i686,x86_64)
SUSE Liberty Linux 9
  • python3-unbound >= 1.24.2-3.el9_8.4
  • unbound >= 1.24.2-3.el9_8.4
  • unbound-devel >= 1.24.2-3.el9_8.4
  • unbound-dracut >= 1.24.2-3.el9_8.4
  • unbound-libs >= 1.24.2-3.el9_8.4
 Patchnames:
RHSA-2026:55841 (i686,x86_64)
SUSE Linux Enterprise Server 16.0
SUSE Linux Enterprise Server for SAP applications 16.0
  • libunbound8 >= 1.25.2-160000.1.1
  • python3-unbound >= 1.25.2-160000.1.1
  • unbound >= 1.25.2-160000.1.1
  • unbound-anchor >= 1.25.2-160000.1.1
  • unbound-devel >= 1.25.2-160000.1.1
 Patchnames:
SUSE-SLES-16.0-1446 (aarch64,ppc64le,s390x,x86_64)
SUSE Linux Micro 6.2
  • libunbound8 >= 1.25.2-160000.1.1
  • unbound-anchor >= 1.25.2-160000.1.1
 Patchnames:
SUSE-SL-Micro-6.2-1446 (aarch64,ppc64le,s390x,x86_64)
openSUSE Leap 16.0
  • libunbound8 >= 1.25.2-160000.1.1
  • python3-unbound >= 1.25.2-160000.1.1
  • unbound >= 1.25.2-160000.1.1
  • unbound-anchor >= 1.25.2-160000.1.1
  • unbound-devel >= 1.25.2-160000.1.1
  • unbound-munin >= 1.25.2-160000.1.1
 Patchnames:
openSUSE-Leap-16.0-1446
openSUSE Tumbleweed
  • libunbound8 >= 1.25.2-1.1
  • python3-unbound >= 1.25.2-1.1
  • unbound >= 1.25.2-1.1
  • unbound-anchor >= 1.25.2-1.1
  • unbound-devel >= 1.25.2-1.1
  • unbound-munin >= 1.25.2-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-11380

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1
SUSE Linux Enterprise Micro 5.5
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
SUSE Linux Enterprise Module for Basesystem 15 SP7
  • libunbound8 >= 1.25.2-150600.23.19.1
  • unbound-anchor >= 1.25.2-150600.23.19.1
  • unbound-devel >= 1.25.2-150600.23.19.1
SUSE Linux Enterprise Server 15 SP7
  • libunbound8 >= 1.25.2-150600.23.19.1
  • unbound-anchor >= 1.25.2-150600.23.19.1
  • unbound-devel >= 1.25.2-150600.23.19.1
SUSE Linux Enterprise Desktop 15 SP7
  • libunbound8 >= 1.25.2-150600.23.19.1
  • unbound-anchor >= 1.25.2-150600.23.19.1
  • unbound-devel >= 1.25.2-150600.23.19.1
SUSE Linux Enterprise Server for SAP Applications 15 SP7
  • libunbound8 >= 1.25.2-150600.23.19.1
  • unbound-anchor >= 1.25.2-150600.23.19.1
  • unbound-devel >= 1.25.2-150600.23.19.1
SUSE Linux Enterprise Module for Package Hub 15 SP7
  • unbound >= 1.25.2-150600.23.19.1
  • unbound-python >= 1.25.2-150600.23.19.1
SUSE Linux Enterprise Server 15 SP4-LTSS
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1
SUSE Linux Enterprise Server 15 SP4-LTSS
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1
SUSE Linux Enterprise Server 15 SP5-LTSS
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1
SUSE Linux Enterprise Server 15 SP5-LTSS
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1
SUSE Linux Enterprise Server 15 SP6-LTSS
  • libunbound8 >= 1.25.2-150600.23.19.1
  • unbound-anchor >= 1.25.2-150600.23.19.1
  • unbound-devel >= 1.25.2-150600.23.19.1
SUSE Linux Enterprise Server 15 SP6-LTSS
  • libunbound8 >= 1.25.2-150600.23.19.1
  • unbound-anchor >= 1.25.2-150600.23.19.1
  • unbound-devel >= 1.25.2-150600.23.19.1
SUSE Linux Enterprise Server for SAP Applications 15 SP4
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1
SUSE Linux Enterprise Server for SAP Applications 15 SP5
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1
SUSE Linux Enterprise Server for SAP Applications 15 SP6
  • libunbound8 >= 1.25.2-150600.23.19.1
  • unbound-anchor >= 1.25.2-150600.23.19.1
  • unbound-devel >= 1.25.2-150600.23.19.1
SUSE Manager Proxy LTS 4.3
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1
SUSE Manager Retail Branch Server LTS 4.3
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1
SUSE Manager Server LTS 4.3
  • libunbound8 >= 1.25.2-150100.10.28.1
  • unbound-anchor >= 1.25.2-150100.10.28.1
  • unbound-devel >= 1.25.2-150100.10.28.1

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Desktop 15 SP7 unbound In progress
SUSE Linux Enterprise Micro 5.5 unbound In progress
SUSE Linux Enterprise Module for Basesystem 15 SP7 unbound In progress
SUSE Linux Enterprise Module for Package Hub 15 SP7 unbound In progress
SUSE Linux Enterprise Server 15 SP7 unbound In progress
SUSE Linux Enterprise Server 16.0 unbound Released
SUSE Linux Enterprise Server 16.1 unbound Released
SUSE Linux Enterprise Server for SAP Applications 15 SP7 unbound In progress
SUSE Linux Enterprise Server for SAP applications 16.0 unbound Released
SUSE Linux Enterprise Server for SAP applications 16.1 unbound Released
SUSE Linux Micro 6.0 unbound Released
SUSE Linux Micro 6.1 unbound Released
SUSE Linux Micro 6.2 unbound Released
openSUSE Leap 16.0 unbound Affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS unbound In progress
SUSE Linux Enterprise High Performance Computing 15 SP5 unbound Affected
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS unbound In progress
SUSE Linux Enterprise Module for Basesystem 15 SP4 unbound Affected
SUSE Linux Enterprise Module for Basesystem 15 SP5 unbound Affected
SUSE Linux Enterprise Module for Basesystem 15 SP6 unbound Affected
SUSE Linux Enterprise Server 15 SP4 unbound Affected
SUSE Linux Enterprise Server 15 SP4-LTSS unbound In progress
SUSE Linux Enterprise Server 15 SP5 unbound Affected
SUSE Linux Enterprise Server 15 SP5-LTSS unbound In progress
SUSE Linux Enterprise Server 15 SP6 unbound Affected
SUSE Linux Enterprise Server 15 SP6-LTSS unbound In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP4 unbound In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP5 unbound In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP6 unbound In progress
SUSE Manager Proxy 4.3 unbound Affected
SUSE Manager Proxy LTS 4.3 unbound In progress
SUSE Manager Retail Branch Server 4.3 unbound Affected
SUSE Manager Retail Branch Server LTS 4.3 unbound In progress
SUSE Manager Server 4.3 unbound Affected
SUSE Manager Server LTS 4.3 unbound In progress
Products past their end of life and not receiving proactive updates anymore.
SUSE CaaS Platform 4.0 unbound Affected
SUSE Enterprise Storage 6 unbound Affected
SUSE Enterprise Storage 7 unbound Affected
SUSE Enterprise Storage 7.1 unbound Affected
SUSE Linux Enterprise Desktop 15 SP1 unbound Affected
SUSE Linux Enterprise Desktop 15 SP2 unbound Affected
SUSE Linux Enterprise Desktop 15 SP3 unbound Affected
SUSE Linux Enterprise Desktop 15 SP4 unbound Affected
SUSE Linux Enterprise Desktop 15 SP5 unbound Affected
SUSE Linux Enterprise Desktop 15 SP6 unbound Affected
SUSE Linux Enterprise High Performance Computing 15 SP1 unbound Affected
SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS unbound Affected
SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS unbound Affected
SUSE Linux Enterprise High Performance Computing 15 SP2 unbound Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS unbound Affected
SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS unbound Affected
SUSE Linux Enterprise High Performance Computing 15 SP3 unbound Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS unbound Affected
SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS unbound Affected
SUSE Linux Enterprise High Performance Computing 15 SP4 unbound Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS unbound In progress
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS unbound In progress
SUSE Linux Enterprise Module for Basesystem 15 SP1 unbound Affected
SUSE Linux Enterprise Module for Basesystem 15 SP2 unbound Affected
SUSE Linux Enterprise Module for Basesystem 15 SP3 unbound Affected
SUSE Linux Enterprise Module for Package Hub 15 SP3 unbound Affected
SUSE Linux Enterprise Module for Package Hub 15 SP4 unbound Affected
SUSE Linux Enterprise Module for Package Hub 15 SP5 unbound Affected
SUSE Linux Enterprise Module for Package Hub 15 SP6 unbound Affected
SUSE Linux Enterprise Real Time 15 SP2 unbound Affected
SUSE Linux Enterprise Real Time 15 SP3 unbound Affected
SUSE Linux Enterprise Real Time 15 SP4 unbound Affected
SUSE Linux Enterprise Server 15 SP1 unbound Affected
SUSE Linux Enterprise Server 15 SP1-BCL unbound Affected
SUSE Linux Enterprise Server 15 SP1-LTSS unbound Affected
SUSE Linux Enterprise Server 15 SP2 unbound Affected
SUSE Linux Enterprise Server 15 SP2-BCL unbound Affected
SUSE Linux Enterprise Server 15 SP2-LTSS unbound Affected
SUSE Linux Enterprise Server 15 SP3 unbound Affected
SUSE Linux Enterprise Server 15 SP3-BCL unbound Affected
SUSE Linux Enterprise Server 15 SP3-LTSS unbound Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP1 unbound Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2 unbound Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 unbound Affected
SUSE Manager Proxy 4.0 unbound Affected
SUSE Manager Proxy 4.1 unbound Affected
SUSE Manager Proxy 4.2 unbound Affected
SUSE Manager Retail Branch Server 4.0 unbound Affected
SUSE Manager Retail Branch Server 4.1 unbound Affected
SUSE Manager Retail Branch Server 4.2 unbound Affected
SUSE Manager Server 4.0 unbound Affected
SUSE Manager Server 4.1 unbound Affected
SUSE Manager Server 4.2 unbound Affected
openSUSE Leap 15.3 unbound Affected
openSUSE Leap 15.4 unbound Affected
openSUSE Leap 15.5 unbound Affected
openSUSE Leap 15.6 unbound Affected

SUSE Timeline for this CVE

CVE page created: Thu Jul 23 11:35:40 2026
CVE page last modified: Fri Aug 28 20:04:43 2026