Upstream information

CVE-2026-42960 at MITRE

Description

NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to poisoning via promiscuous records for the authority section. Promiscuous RRSets that complement DNS replies in the authority section can be used to trick Unbound to cache such records. If an adversary is able to attach such records in a reply (i.e., spoofed packet, fragmentation attack) he would be able to poison Unbound's cache. A malicious actor can exploit the possible poisonous effect by injecting RRSets other than NS that are also accompanied by address records in a reply, for example MX. This could be achieved by trying to spoof a reply packet or fragmentation attacks. Unbound would then accept the relative address records in the additional section and cache them if the authority RRSet has enough trust at this point, i.e., in-zone data for the delegation point. Unbound 1.25.1 contains a patch with a fix that disregards address records from the additional section if they are not explicitly relevant only to authority NS records, mitigating the possible poison effect. This is a complement fix to CVE-2025-11411.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail National Vulnerability Database SUSE
Base Score 10 5.9
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network Network
Attack Complexity Low High
Privileges Required None None
User Interaction None None
Scope Changed Unchanged
Confidentiality Impact None None
Integrity Impact High High
Availability Impact High None
CVSSv3 Version 3.1 3.1
CVSS v4 Scores
CVSS detail CNA (NLnet Labs)
Base Score 5.7
Vector CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber
Attack Vector Adjacent Network
Attack Complexity Low
Attack Requirements Present
Privileges Required None
User Interaction None
Vulnerable System Confidentiality Impact None
Vulnerable System Integrity Impact High
Vulnerable System Availability Impact None
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact High
Subsequent System Availability Impact High
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1265588 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
Container suse/sl-micro/6.0/baremetal-os-container:latest
Container suse/sl-micro/6.0/base-os-container:latest
Container suse/sl-micro/6.0/kvm-os-container:latest
Container suse/sl-micro/6.0/rt-os-container:latest
Image SL-Micro
Image SLE-Micro
Image SLE-Micro-Azure
Image SLE-Micro-BYOS
Image SLE-Micro-BYOS-Azure
Image SLE-Micro-BYOS-EC2
Image SLE-Micro-BYOS-GCE
Image SLE-Micro-EC2
Image SLE-Micro-GCE
  • rsync >= 3.2.7-5.1
SUSE Linux Micro 6.0
  • libunbound8 >= 1.22.0-3.1
  • unbound-anchor >= 1.22.0-3.1
 Patchnames:
SUSE-SLE-Micro-6.0-732
SUSE Linux Micro 6.1
  • libunbound8 >= 1.22.0-slfo.1.1_4.1
  • unbound-anchor >= 1.22.0-slfo.1.1_4.1
 Patchnames:
SUSE-SLE-Micro-6.1-551
openSUSE Tumbleweed
  • libunbound8 >= 1.25.1-1.1
  • python3-unbound >= 1.25.1-1.1
  • unbound >= 1.25.1-1.1
  • unbound-anchor >= 1.25.1-1.1
  • unbound-devel >= 1.25.1-1.1
  • unbound-munin >= 1.25.1-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-10903

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1
SUSE Linux Enterprise Micro 5.5
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
SUSE Linux Enterprise Module for Basesystem 15 SP7
  • libunbound8 >= 1.20.0-150600.23.16.1
  • unbound-anchor >= 1.20.0-150600.23.16.1
  • unbound-devel >= 1.20.0-150600.23.16.1
SUSE Linux Enterprise Server 15 SP7
  • libunbound8 >= 1.20.0-150600.23.16.1
  • unbound-anchor >= 1.20.0-150600.23.16.1
  • unbound-devel >= 1.20.0-150600.23.16.1
SUSE Linux Enterprise Desktop 15 SP7
  • libunbound8 >= 1.20.0-150600.23.16.1
  • unbound-anchor >= 1.20.0-150600.23.16.1
  • unbound-devel >= 1.20.0-150600.23.16.1
SUSE Linux Enterprise Server for SAP Applications 15 SP7
  • libunbound8 >= 1.20.0-150600.23.16.1
  • unbound-anchor >= 1.20.0-150600.23.16.1
  • unbound-devel >= 1.20.0-150600.23.16.1
SUSE Linux Enterprise High Performance Computing 15 SP7
  • libunbound8 >= 1.20.0-150600.23.16.1
  • unbound-anchor >= 1.20.0-150600.23.16.1
  • unbound-devel >= 1.20.0-150600.23.16.1
SUSE Linux Enterprise Module for Package Hub 15 SP7
  • unbound >= 1.20.0-150600.23.16.1
  • unbound-python >= 1.20.0-150600.23.16.1
SUSE Linux Enterprise Server 15 SP4-LTSS
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1
SUSE Linux Enterprise Server 15 SP4-LTSS
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1
SUSE Linux Enterprise Server 15 SP5-LTSS
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1
SUSE Linux Enterprise Server 15 SP5-LTSS
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1
SUSE Linux Enterprise Server 15 SP6-LTSS
  • libunbound8 >= 1.20.0-150600.23.16.1
  • unbound-anchor >= 1.20.0-150600.23.16.1
  • unbound-devel >= 1.20.0-150600.23.16.1
SUSE Linux Enterprise Server 15 SP6-LTSS
  • libunbound8 >= 1.20.0-150600.23.16.1
  • unbound-anchor >= 1.20.0-150600.23.16.1
  • unbound-devel >= 1.20.0-150600.23.16.1
SUSE Linux Enterprise Server for SAP Applications 15 SP4
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1
SUSE Linux Enterprise Server for SAP Applications 15 SP5
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1
SUSE Linux Enterprise Server for SAP Applications 15 SP6
  • libunbound8 >= 1.20.0-150600.23.16.1
  • unbound-anchor >= 1.20.0-150600.23.16.1
  • unbound-devel >= 1.20.0-150600.23.16.1
SUSE Manager Proxy LTS 4.3
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1
SUSE Manager Retail Branch Server LTS 4.3
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1
SUSE Manager Server LTS 4.3
  • libunbound8 >= 1.20.0-150100.10.25.1
  • unbound-anchor >= 1.20.0-150100.10.25.1
  • unbound-devel >= 1.20.0-150100.10.25.1

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 High Performance Computing 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 In progress
SUSE Linux Enterprise Server 16.1 unbound Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 unbound In progress
SUSE Linux Enterprise Server for SAP applications 16.0 unbound In progress
SUSE Linux Enterprise Server for SAP applications 16.1 unbound Affected
SUSE Linux Micro 6.0 unbound Released
SUSE Linux Micro 6.1 unbound Released
SUSE Linux Micro 6.2 unbound In progress
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 unbound Affected
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 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-ESPOS unbound In progress
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS unbound In progress
SUSE Linux Enterprise High Performance Computing 15 SP6 unbound Affected
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 Linux Enterprise Server for SAP Applications 15 SP4 unbound In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP5 unbound In progress
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: Tue May 19 10:30:50 2026
CVE page last modified: Tue Jun 2 21:29:22 2026