Security update for unbound

Announcement ID:	SUSE-SU-2026:2281-1
Release Date:	2026-06-05T12:12:48Z
Rating:	important
References:	bsc#1265578 bsc#1265580 bsc#1265581 bsc#1265582 bsc#1265583 bsc#1265584 bsc#1265585 bsc#1265586 bsc#1265587 bsc#1265588 bsc#1265589
Cross-References:	CVE-2026-32792 CVE-2026-33278 CVE-2026-40622 CVE-2026-41292 CVE-2026-42534 CVE-2026-42923 CVE-2026-42944 CVE-2026-42959 CVE-2026-42960 CVE-2026-44390 CVE-2026-44608
CVSS scores:	CVE-2026-32792 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-32792 ( NVD ): 4.6 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/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:Green CVE-2026-32792 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVE-2026-33278 ( SUSE ): 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H CVE-2026-33278 ( NVD ): 9.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/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:Red CVE-2026-33278 ( NVD ): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2026-40622 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVE-2026-40622 ( NVD ): 6.6 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/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 CVE-2026-40622 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVE-2026-41292 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-41292 ( NVD ): 6.6 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/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:Red CVE-2026-41292 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-42534 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-42534 ( NVD ): 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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 CVE-2026-42534 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVE-2026-42923 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-42923 ( NVD ): 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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 CVE-2026-42923 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVE-2026-42944 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-42944 ( NVD ): 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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:Red CVE-2026-42944 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-42959 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-42959 ( NVD ): 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/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:Red CVE-2026-42959 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-42960 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVE-2026-42960 ( NVD ): 5.7 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 CVE-2026-42960 ( NVD ): 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H CVE-2026-44390 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-44390 ( NVD ): 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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 CVE-2026-44390 ( NVD ): 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVE-2026-44608 ( SUSE ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2026-44608 ( NVD ): 4.6 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/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 CVE-2026-44608 ( NVD ): 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products:	Basesystem Module 15-SP7 openSUSE Leap 15.6 SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise Real Time 15 SP7 SUSE Linux Enterprise Server 15 SP6 SUSE Linux Enterprise Server 15 SP6 LTSS SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP6 SUSE Linux Enterprise Server for SAP Applications 15 SP7 SUSE Package Hub 15 15-SP7

An update that solves 11 vulnerabilities can now be installed.

Description:

This update for unbound fixes the following issues

• CVE-2026-32792: Packet of death with DNSCrypt (bsc#1265583).
• CVE-2026-33278: Possible remote code execution during DNSSEC validation (bsc#1265587).
• CVE-2026-40622: "Ghost domain name" variant (bsc#1265581).
• CVE-2026-41292: Parsing a long list of incoming EDNS options degrades performance (bsc#1265580).
• CVE-2026-42534: Jostle logic bypass degrades resolution performance (bsc#1265585).
• CVE-2026-42923: Degradation of service with unbounded NSEC3 hash calculations (bsc#1265589).
• CVE-2026-42944: Heap overflow and crash with multiple nsid, cookie, padding EDNS options (bsc#1265578).
• CVE-2026-42959: Crash during DNSSEC validation of malicious content (bsc#1265586).
• CVE-2026-42960: Possible cache poisoning attack while following delegation (bsc#1265588).
• CVE-2026-44390: Unbounded name compression in certain cases causes degradation of service (bsc#1265584).
• CVE-2026-44608: Use after free and crash in RPZ code (bsc#1265582).

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

• openSUSE Leap 15.6
  zypper in -t patch SUSE-2026-2281=1
• SUSE Package Hub 15 15-SP7
  zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-2281=1
• SUSE Linux Enterprise Server 15 SP6 LTSS
  zypper in -t patch SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-2281=1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6
  zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP6-2026-2281=1
• Basesystem Module 15-SP7
  zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-2281=1

Package List:

• openSUSE Leap 15.6 (aarch64 ppc64le s390x x86_64 i586)
  • unbound-python-debuginfo-1.20.0-150600.23.16.1
  • libunbound-devel-mini-debugsource-1.20.0-150600.23.16.1
  • libunbound-devel-mini-1.20.0-150600.23.16.1
  • unbound-python-1.20.0-150600.23.16.1
  • libunbound-devel-mini-debuginfo-1.20.0-150600.23.16.1
  • unbound-debugsource-1.20.0-150600.23.16.1
  • unbound-1.20.0-150600.23.16.1
  • libunbound8-1.20.0-150600.23.16.1
  • unbound-debuginfo-1.20.0-150600.23.16.1
  • unbound-anchor-debuginfo-1.20.0-150600.23.16.1
  • libunbound8-debuginfo-1.20.0-150600.23.16.1
  • unbound-devel-1.20.0-150600.23.16.1
  • unbound-anchor-1.20.0-150600.23.16.1
• openSUSE Leap 15.6 (noarch)
  • unbound-munin-1.20.0-150600.23.16.1
• SUSE Package Hub 15 15-SP7 (aarch64 ppc64le s390x x86_64)
  • unbound-python-debuginfo-1.20.0-150600.23.16.1
  • unbound-python-1.20.0-150600.23.16.1
  • unbound-debugsource-1.20.0-150600.23.16.1
  • unbound-1.20.0-150600.23.16.1
  • unbound-debuginfo-1.20.0-150600.23.16.1
• SUSE Linux Enterprise Server 15 SP6 LTSS (aarch64 ppc64le s390x x86_64)
  • unbound-debugsource-1.20.0-150600.23.16.1
  • libunbound8-1.20.0-150600.23.16.1
  • unbound-debuginfo-1.20.0-150600.23.16.1
  • unbound-anchor-debuginfo-1.20.0-150600.23.16.1
  • libunbound8-debuginfo-1.20.0-150600.23.16.1
  • unbound-devel-1.20.0-150600.23.16.1
  • unbound-anchor-1.20.0-150600.23.16.1
• SUSE Linux Enterprise Server for SAP Applications 15 SP6 (ppc64le x86_64)
  • unbound-debugsource-1.20.0-150600.23.16.1
  • libunbound8-1.20.0-150600.23.16.1
  • unbound-debuginfo-1.20.0-150600.23.16.1
  • unbound-anchor-debuginfo-1.20.0-150600.23.16.1
  • libunbound8-debuginfo-1.20.0-150600.23.16.1
  • unbound-devel-1.20.0-150600.23.16.1
  • unbound-anchor-1.20.0-150600.23.16.1
• Basesystem Module 15-SP7 (aarch64 ppc64le s390x x86_64)
  • unbound-debugsource-1.20.0-150600.23.16.1
  • libunbound8-1.20.0-150600.23.16.1
  • unbound-debuginfo-1.20.0-150600.23.16.1
  • unbound-anchor-debuginfo-1.20.0-150600.23.16.1
  • libunbound8-debuginfo-1.20.0-150600.23.16.1
  • unbound-devel-1.20.0-150600.23.16.1
  • unbound-anchor-1.20.0-150600.23.16.1

References:

• https://www.suse.com/security/cve/CVE-2026-32792.html
• https://www.suse.com/security/cve/CVE-2026-33278.html
• https://www.suse.com/security/cve/CVE-2026-40622.html
• https://www.suse.com/security/cve/CVE-2026-41292.html
• https://www.suse.com/security/cve/CVE-2026-42534.html
• https://www.suse.com/security/cve/CVE-2026-42923.html
• https://www.suse.com/security/cve/CVE-2026-42944.html
• https://www.suse.com/security/cve/CVE-2026-42959.html
• https://www.suse.com/security/cve/CVE-2026-42960.html
• https://www.suse.com/security/cve/CVE-2026-44390.html
• https://www.suse.com/security/cve/CVE-2026-44608.html
• https://bugzilla.suse.com/show_bug.cgi?id=1265578
• https://bugzilla.suse.com/show_bug.cgi?id=1265580
• https://bugzilla.suse.com/show_bug.cgi?id=1265581
• https://bugzilla.suse.com/show_bug.cgi?id=1265582
• https://bugzilla.suse.com/show_bug.cgi?id=1265583
• https://bugzilla.suse.com/show_bug.cgi?id=1265584
• https://bugzilla.suse.com/show_bug.cgi?id=1265585
• https://bugzilla.suse.com/show_bug.cgi?id=1265586
• https://bugzilla.suse.com/show_bug.cgi?id=1265587
• https://bugzilla.suse.com/show_bug.cgi?id=1265588
• https://bugzilla.suse.com/show_bug.cgi?id=1265589