Important: dovecot security update — RHSA-2026:19364

Summary

RHSA-2026:19364 is a security advisory from Red Hat. Important: dovecot security update Vendor: Red Hat. Reported severity or threat: high.

Risk context

• Reported severity or threat level: high.
• Review exposure for the affected product or family: Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support | Red Hat Enterprise Linux for ARM 64 | Red Hat Enterprise Linux for IBM z Systems - 4 years of updates | Red Hat CodeReady Linux Builder for x86_64 | Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support | Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle | Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions | Red Hat Enterprise Linux for IBM z Systems | Red Hat CodeReady Linux Builder for Power, little endian | Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle | Red Hat CodeReady Linux Builder for IBM z Systems | Red Hat Enterprise Linux for ARM 64 - 4 years of updates | Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions | Red Hat Enterprise Linux for x86_64 | Red Hat Enterprise Linux for x86_64 - Extended Update Support | Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support | Red Hat Enterprise Linux for x86_64 - Extended Life Cycle | Red Hat Enterprise Linux for Power, little endian | Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle | Red Hat Enterprise Linux for ARM 64 - Extended Update Support | Red Hat Enterprise Linux for IBM z Systems - Extended Update Support | Red Hat Enterprise Linux for Power, little endian - Extended Update Support | Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support | Red Hat CodeReady Linux Builder for ARM 64.

Product

Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support | Red Hat Enterprise Linux for ARM 64 | Red Hat Enterprise Linux for IBM z Systems - 4 years of updates | Red Hat CodeReady Linux Builder for x86_64 | Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support | Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle | Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions | Red Hat Enterprise Linux for IBM z Systems | Red Hat CodeReady Linux Builder for Power, little endian | Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle | Red Hat CodeReady Linux Builder for IBM z Systems | Red Hat Enterprise Linux for ARM 64 - 4 years of updates | Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions | Red Hat Enterprise Linux for x86_64 | Red Hat Enterprise Linux for x86_64 - Extended Update Support | Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support | Red Hat Enterprise Linux for x86_64 - Extended Life Cycle | Red Hat Enterprise Linux for Power, little endian | Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle | Red Hat Enterprise Linux for ARM 64 - Extended Update Support | Red Hat Enterprise Linux for IBM z Systems - Extended Update Support | Red Hat Enterprise Linux for Power, little endian - Extended Update Support | Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support | Red Hat CodeReady Linux Builder for ARM 64

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source

Evidence and provenance

Canonical advisory ID

RHSA-2026:19364

Source

Red Hat

Vendor

Red Hat

Published by source

2026-05-19

Last source activity

2026-05-19

Curated by

hlukh.ch

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