RHSA-2026:54401: Important: rhc security update

Published Aug 12, 2026
·
Updated

Important: rhc security update

Other sources

rhc is a client tool and daemon that connects the system to Red Hat hosted services enabling system and subscription management.Security Fix(es): golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing (CVE-2026-39821) crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries (CVE-2026-27145) 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.

— Red Hat

Affected Software

33 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for IBM z Systems - 4 years of updates
Red Hat Red Hat Enterprise Linux Server - AUS
Red Hat Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle
Red Hat Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle
redhat/rhc<0.2.7-1.el9_6.5
0.2.7-1.el9_6.5
redhat/rhc<0.2.7-1.el9_6.5
0.2.7-1.el9_6.5
redhat/rhc-debuginfo<0.2.7-1.el9_6.5
0.2.7-1.el9_6.5
redhat/rhc-debugsource<0.2.7-1.el9_6.5
0.2.7-1.el9_6.5
redhat/rhc-debuginfo<0.2.7-1.el9_6.5
0.2.7-1.el9_6.5
redhat/rhc-debugsource<0.2.7-1.el9_6.5
0.2.7-1.el9_6.5
redhat/rhc<0.2.7-1.el9_6.5
0.2.7-1.el9_6.5
redhat/rhc-debuginfo<0.2.7-1.el9_6.5
0.2.7-1.el9_6.5
redhat/rhc-debugsource<0.2.7-1.el9_6.5
0.2.7-1.el9_6.5
redhat/rhc<0.2.7-1.el9_6.5.aa
0.2.7-1.el9_6.5.aa
redhat/rhc-debuginfo<0.2.7-1.el9_6.5.aa
0.2.7-1.el9_6.5.aa
redhat/rhc-debugsource<0.2.7-1.el9_6.5.aa
0.2.7-1.el9_6.5.aa
redhat/rhc-devel<0.2.7-1.el9_6.5
0.2.7-1.el9_6.5
redhat/rhc-devel<0.2.7-1.el9_6.5
0.2.7-1.el9_6.5
redhat/rhc-devel<0.2.7-1.el9_6.5
0.2.7-1.el9_6.5
redhat/rhc-devel<0.2.7-1.el9_6.5.aa
0.2.7-1.el9_6.5.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/rhc to a version that resolves this vulnerability.

    Fixed in 0.2.7-1.el9_6.5
  2. Upgrade

    Upgrade redhat/rhc-debuginfo to a version that resolves this vulnerability.

    Fixed in 0.2.7-1.el9_6.5
  3. Upgrade

    Upgrade redhat/rhc-debugsource to a version that resolves this vulnerability.

    Fixed in 0.2.7-1.el9_6.5
  4. Upgrade

    Upgrade redhat/rhc to a version that resolves this vulnerability.

    Fixed in 0.2.7-1.el9_6.5.aa
  5. Upgrade

    Upgrade redhat/rhc-debuginfo to a version that resolves this vulnerability.

    Fixed in 0.2.7-1.el9_6.5.aa
  6. Upgrade

    Upgrade redhat/rhc-debugsource to a version that resolves this vulnerability.

    Fixed in 0.2.7-1.el9_6.5.aa
  7. Upgrade

    Upgrade redhat/rhc-devel to a version that resolves this vulnerability.

    Fixed in 0.2.7-1.el9_6.5
  8. Upgrade

    Upgrade redhat/rhc-devel to a version that resolves this vulnerability.

    Fixed in 0.2.7-1.el9_6.5.aa
  9. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch CVE-2026-27145
  10. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch CVE-2026-39821

Event History

Aug 12, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·03:02 PM
Data Sourced
via Red Hat·03:02 PM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:54401?

The severity of RHSA-2026:54401 is classified as high with a score of 7.

2

How do I fix RHSA-2026:54401?

To fix RHSA-2026:54401, users should update the affected Red Hat packages to the latest version provided by Red Hat.

3

What does RHSA-2026:54401 address?

RHSA-2026:54401 addresses a security vulnerability in the rhc client tool that may allow privilege escalation.

4

Which software is affected by RHSA-2026:54401?

The affected software includes redhat/rhc, redhat/rhc-debuginfo, redhat/rhc-debugsource, and redhat/rhc-devel.

5

Is RHSA-2026:54401 applicable to all Red Hat Enterprise Linux versions?

RHSA-2026:54401 is applicable to several versions of Red Hat Enterprise Linux, including those for ARM 64 and IBM z Systems.

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