SUSE alert openSUSE-SU-2026:21109-1 (dovecot24)

From:
             
 
null@suse.de
To:
             
 
security-announce@lists.opensuse.org
Subject:
             
 
openSUSE-SU-2026:21109-1: important: Security update for dovecot24
Date:
             
 
Tue, 30 Jun 2026 09:48:24 +0200
Message-ID:
             
 
<20260630074824.89679FF48@maintenance.suse.de>
Archive-link:
             
 
Article
openSUSE security update: security update for dovecot24
-------------------------------------------------------------

Announcement ID: openSUSE-SU-2026:21109-1
Rating: important
References:

  * bsc#1265146
  * bsc#1265147
  * bsc#1265148
  * bsc#1265149
  * bsc#1265150



Cross-References:

  * CVE-2026-27851
  * CVE-2026-33603
  * CVE-2026-40016
  * CVE-2026-40020
  * CVE-2026-42006



CVSS scores:

  * CVE-2026-27851 ( SUSE ): 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-27851 ( SUSE ): 9.1 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-33603 ( SUSE ): 6.8 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  * CVE-2026-33603 ( SUSE ): 7.6 CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  * CVE-2026-40016 ( SUSE ): 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-40016 ( SUSE ): 7.1 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-40020 ( SUSE ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-40020 ( SUSE ): 5.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
  * CVE-2026-42006 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-42006 ( SUSE ): 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

Affected Products:

         openSUSE Leap 16.0

-------------------------------------------------------------

An update that solves 5 vulnerabilities and has 5 bug fixes can now be installed.

Description:

This update for dovecot24 fixes the following issues

- CVE-2026-27851: lib-var-expand: safe filter leaks to all following pipelines (bsc#1265146).
- CVE-2026-33603: login: base64 input can contain tabs that bypass IPC protection (bsc#1265147).
- CVE-2026-40016: Sieve: contains/: matches O(NxM) substring match bypasses sieve_max_cpu_time
limit (bsc#1265148).
- CVE-2026-40020: IMAP folders can be shared-spammed to everyone (bsc#1265149).
- CVE-2026-42006: imap-login: uncontrolled memory usage with excessive bracing over IMAP
(bsc#1265150).

Changes for dovecot24:

- Update to 2.4.4


Patch instructions:

   To install this openSUSE security 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 16.0

   zypper in -t patch openSUSE-Leap-16.0-974=1

Package List:

- openSUSE Leap 16.0:

  dovecot24-2.4.4-160000.1.1
  dovecot24-backend-mysql-2.4.4-160000.1.1
  dovecot24-backend-pgsql-2.4.4-160000.1.1
  dovecot24-backend-sqlite-2.4.4-160000.1.1
  dovecot24-devel-2.4.4-160000.1.1
  dovecot24-fts-2.4.4-160000.1.1
  dovecot24-fts-flatcurve-2.4.4-160000.1.1
  dovecot24-fts-solr-2.4.4-160000.1.1

References:

  * https://www.suse.com/security/cve/CVE-2026-27851.html
  * https://www.suse.com/security/cve/CVE-2026-33603.html
  * https://www.suse.com/security/cve/CVE-2026-40016.html
  * https://www.suse.com/security/cve/CVE-2026-40020.html
  * https://www.suse.com/security/cve/CVE-2026-42006.html