SUSE-SU-2026:21913-1: important: Security update for unbound

SLE-SECURITY-UPDATES null at suse.de
Tue Jun 2 16:50:27 UTC 2026 

# Security update for unbound

Announcement ID: SUSE-SU-2026:21913-1  
Release Date: 2026-05-28T15:43:53Z  
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:

  * SUSE Linux Micro 6.0

  
  
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:

  * SUSE Linux Micro 6.0  
    zypper in -t patch SUSE-SLE-Micro-6.0-732=1

## Package List:

  * SUSE Linux Micro 6.0 (aarch64 s390x x86_64)
    * libunbound8-1.22.0-3.1
    * unbound-anchor-1.22.0-3.1
    * unbound-debugsource-1.22.0-3.1
    * unbound-anchor-debuginfo-1.22.0-3.1
    * libunbound8-debuginfo-1.22.0-3.1

## 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

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