SUSE SLES16: dovecot24 / dovecot24-backend-mysql / dovecot24-backend-pgsql / etc (SUSE-SU-2026:22185-1)

critical Nessus Plugin ID 323080

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLES16 / SLES_SAP16 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:22185-1 advisory.

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

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 323080

File Name: suse_SU-2026-22185-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 6/26/2026

Updated: 6/26/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, tenable_cloud_security, tenable_self_hosted_container_security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

CVSS Score Source: CVE-2026-27851

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:dovecot24-backend-pgsql, p-cpe:/a:novell:suse_linux:dovecot24-fts, p-cpe:/a:novell:suse_linux:dovecot24-devel, p-cpe:/a:novell:suse_linux:dovecot24-backend-sqlite, p-cpe:/a:novell:suse_linux:dovecot24-backend-mysql, cpe:/o:novell:suse_linux:16, p-cpe:/a:novell:suse_linux:dovecot24, p-cpe:/a:novell:suse_linux:dovecot24-fts-solr

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 6/19/2026

Vulnerability Publication Date: 5/12/2026

Reference Information

CVE: CVE-2026-27851, CVE-2026-33603, CVE-2026-40016, CVE-2026-40020, CVE-2026-42006

SuSE: SUSE-SU-2026:22185-1

Detections

Analytics