SUSE-SU-2026:4271-1: moderate: Security update for dovecot22

[SLE-SECURITY-UPDATES]

# Security update for dovecot22

Announcement ID: SUSE-SU-2026:4271-1  
Release Date: 2026-09-21T07:30:05Z  
Rating: moderate  
References:

  * bsc#1265148

  
Cross-References:

  * CVE-2026-40016

  
CVSS scores:

  * 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-2026-40016 ( 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 ( NVD ):  5.3 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-40016 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * SUSE Linux Enterprise Server 12 SP5
  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
  * SUSE Linux Enterprise Server for SAP Applications 12 SP5

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for dovecot22 fixes the following issue:

  * CVE-2026-40016: Sieve :contains/:matches O(NxM) substring match bypasses
    sieve_max_cpu_time limit (bsc#1265148).

## 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 Enterprise Server 12 SP5 LTSS Extended Security  
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-4271

## Package List:

  * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    * dovecot22-backend-pgsql-2.2.31-19.43.1
    * dovecot22-backend-mysql-2.2.31-19.43.1
    * dovecot22-backend-mysql-debuginfo-2.2.31-19.43.1
    * dovecot22-backend-sqlite-debuginfo-2.2.31-19.43.1
    * dovecot22-2.2.31-19.43.1
    * dovecot22-backend-sqlite-2.2.31-19.43.1
    * dovecot22-devel-2.2.31-19.43.1
    * dovecot22-debugsource-2.2.31-19.43.1
    * dovecot22-backend-pgsql-debuginfo-2.2.31-19.43.1
    * dovecot22-debuginfo-2.2.31-19.43.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-40016.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1265148

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