Security update for dovecot22

Announcement ID: SUSE-SU-2026:2645-1
Release Date: 2026-06-26T09:00:45Z
Rating: important
References:
Cross-References:
CVSS scores:
  • 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-2026-33603 ( 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 ( NVD ): 6.8 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  • CVE-2026-33603 ( NVD ): 5.3 CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
  • 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-2026-40020 ( 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 ( NVD ): 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
  • CVE-2026-40020 ( NVD ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
  • 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
  • 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 ( NVD ): 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Affected Products:
  • SUSE Linux Enterprise High Performance Computing 12 SP5
  • SUSE Linux Enterprise Server 12 SP5
  • SUSE Linux Enterprise Server 12 SP5 LTSS
  • SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
  • SUSE Linux Enterprise Server for SAP Applications 12 SP5

An update that solves three vulnerabilities can now be installed.

Description:

This update for dovecot22 fixes the following issues

  • CVE-2026-33603: login: base64 input can contain tabs that bypass IPC protection (bsc#1265147).
  • 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).

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
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-2645=1
  • SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security
    zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-2645=1

Package List:

  • SUSE Linux Enterprise Server 12 SP5 LTSS (aarch64 ppc64le s390x x86_64)
    • dovecot22-backend-sqlite-2.2.31-19.37.2
    • dovecot22-debuginfo-2.2.31-19.37.2
    • dovecot22-devel-2.2.31-19.37.2
    • dovecot22-2.2.31-19.37.2
    • dovecot22-backend-pgsql-2.2.31-19.37.2
    • dovecot22-backend-mysql-2.2.31-19.37.2
    • dovecot22-backend-pgsql-debuginfo-2.2.31-19.37.2
    • dovecot22-debugsource-2.2.31-19.37.2
    • dovecot22-backend-sqlite-debuginfo-2.2.31-19.37.2
    • dovecot22-backend-mysql-debuginfo-2.2.31-19.37.2
  • SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security (x86_64)
    • dovecot22-backend-sqlite-2.2.31-19.37.2
    • dovecot22-debuginfo-2.2.31-19.37.2
    • dovecot22-devel-2.2.31-19.37.2
    • dovecot22-2.2.31-19.37.2
    • dovecot22-backend-pgsql-2.2.31-19.37.2
    • dovecot22-backend-mysql-2.2.31-19.37.2
    • dovecot22-backend-pgsql-debuginfo-2.2.31-19.37.2
    • dovecot22-debugsource-2.2.31-19.37.2
    • dovecot22-backend-sqlite-debuginfo-2.2.31-19.37.2
    • dovecot22-backend-mysql-debuginfo-2.2.31-19.37.2

References: