RHSA-2026:91366: High severity Red Hat Red Hat Enterprise Linux for Power, little endian vulnerability
Published Oct 27, 2026
·Updated
Important: libX11 security update
Affected Software
16 affected components
Red Hat Red Hat Enterprise Linux for Power, little endian
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for Power, little endian - 4 years of support
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for IBM z Systems
Red Hat Red Hat Enterprise Linux for ARM 64
Red Hat Red Hat Enterprise Linux for x86_64
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for x86_64 - 4 years of updates
Event History
Oct 27, 2026
Advisory Published
via Red Hat·10:25 PM
Data Sourced
via Red Hat·10:25 PM
DescriptionSeverityAffected Software
Frequently Asked Questions
1
Which environments are covered by this update?
The update applies to listed Red Hat Enterprise Linux offerings for Power little endian, x86_64, IBM z Systems, and ARM 64, including certain Extended Life Cycle, Extended Update Support, and four-year support variants.
2
What is known about exploitation conditions or temporary mitigations?
The provided advisory data does not specify attacker prerequisites, affected default configurations, indicators of compromise, or mitigations beyond applying the security update.