RLSA-2026:13498

Synopsis

Important: dovecot security update

Description

Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages.

Security Fix(es):

* dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command (CVE-2025-59032)

* dovecot: denial of service via crafted message before authentication (CVE-2026-27858)

* dovecot: denial of service via specially crafted NOOP command (CVE-2026-27857)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected products

Rocky Linux 10 aarch64 Rocky Linux 10 ppc64le Rocky Linux 10 s390x Rocky Linux 10 x86_64

Fixes

2452175 2452179 2452172

CVEs

CVE-2025-59032 CVE-2026-27857 CVE-2026-27858

Affected packages

Rocky Linux 10 aarch64 - CRB

dovecot-devel-1:2.3.21-16.el10_1.1.aarch64.rpm

Rocky Linux 10 ppc64le - AppStream

dovecot-mysql-debuginfo-1:2.3.21-16.el10_1.1.ppc64le.rpm dovecot-mysql-1:2.3.21-16.el10_1.1.ppc64le.rpm dovecot-1:2.3.21-16.el10_1.1.ppc64le.rpm dovecot-1:2.3.21-16.el10_1.1.src.rpm dovecot-debuginfo-1:2.3.21-16.el10_1.1.ppc64le.rpm dovecot-debugsource-1:2.3.21-16.el10_1.1.ppc64le.rpm dovecot-pgsql-1:2.3.21-16.el10_1.1.ppc64le.rpm dovecot-pigeonhole-debuginfo-1:2.3.21-16.el10_1.1.ppc64le.rpm dovecot-pigeonhole-1:2.3.21-16.el10_1.1.ppc64le.rpm dovecot-pgsql-debuginfo-1:2.3.21-16.el10_1.1.ppc64le.rpm

Rocky Linux 10 x86_64 - AppStream

dovecot-pigeonhole-1:2.3.21-16.el10_1.1.x86_64.rpm dovecot-mysql-debuginfo-1:2.3.21-16.el10_1.1.x86_64.rpm dovecot-pgsql-debuginfo-1:2.3.21-16.el10_1.1.x86_64.rpm dovecot-debugsource-1:2.3.21-16.el10_1.1.x86_64.rpm dovecot-debuginfo-1:2.3.21-16.el10_1.1.x86_64.rpm dovecot-1:2.3.21-16.el10_1.1.x86_64.rpm dovecot-mysql-1:2.3.21-16.el10_1.1.x86_64.rpm dovecot-1:2.3.21-16.el10_1.1.src.rpm dovecot-pgsql-1:2.3.21-16.el10_1.1.x86_64.rpm dovecot-pigeonhole-debuginfo-1:2.3.21-16.el10_1.1.x86_64.rpm

Rocky Linux 10 s390x - AppStream

dovecot-pgsql-debuginfo-1:2.3.21-16.el10_1.1.s390x.rpm dovecot-debugsource-1:2.3.21-16.el10_1.1.s390x.rpm dovecot-mysql-1:2.3.21-16.el10_1.1.s390x.rpm dovecot-pgsql-1:2.3.21-16.el10_1.1.s390x.rpm dovecot-1:2.3.21-16.el10_1.1.src.rpm dovecot-pigeonhole-debuginfo-1:2.3.21-16.el10_1.1.s390x.rpm dovecot-mysql-debuginfo-1:2.3.21-16.el10_1.1.s390x.rpm dovecot-1:2.3.21-16.el10_1.1.s390x.rpm dovecot-pigeonhole-1:2.3.21-16.el10_1.1.s390x.rpm dovecot-debuginfo-1:2.3.21-16.el10_1.1.s390x.rpm

Rocky Linux 10 aarch64 - AppStream

dovecot-pgsql-1:2.3.21-16.el10_1.1.aarch64.rpm dovecot-mysql-debuginfo-1:2.3.21-16.el10_1.1.aarch64.rpm dovecot-1:2.3.21-16.el10_1.1.aarch64.rpm dovecot-1:2.3.21-16.el10_1.1.src.rpm dovecot-pigeonhole-1:2.3.21-16.el10_1.1.aarch64.rpm dovecot-pigeonhole-debuginfo-1:2.3.21-16.el10_1.1.aarch64.rpm dovecot-pgsql-debuginfo-1:2.3.21-16.el10_1.1.aarch64.rpm dovecot-mysql-1:2.3.21-16.el10_1.1.aarch64.rpm dovecot-debugsource-1:2.3.21-16.el10_1.1.aarch64.rpm dovecot-debuginfo-1:2.3.21-16.el10_1.1.aarch64.rpm

Rocky Linux 10 x86_64 - CRB

dovecot-devel-1:2.3.21-16.el10_1.1.x86_64.rpm

Rocky Linux 10 s390x - CRB

dovecot-devel-1:2.3.21-16.el10_1.1.s390x.rpm

Rocky Linux 10 ppc64le - CRB

dovecot-devel-1:2.3.21-16.el10_1.1.ppc64le.rpm