RHSA-2026:55426: Important: 389-ds-base security update

Published Aug 17, 2026
·
Updated

389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration.Security Fix(es): 389-ds-base: 389-ds-base: pre-auth LDAP filter injection in CleanAllRUV status check (CVE-2026-11770) 389-ds-base: 389-ds-base: NULL pointer dereference in deref control plugin BER parser (CVE-2026-11788) 389-ds-base: 389-ds-base: pre-authentication stack buffer overflow in getruvelementfromberval() via unbounded replica ID parsing (CVE-2026-15722) 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 Software

50 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for ARM 64 - 4 years of updates
Red Hat Red Hat Enterprise Linux for Power, little endian - 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 - Extended Update Support
Red Hat Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions
Red Hat Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat Red Hat CodeReady Linux Builder 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 x86_64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle
Red Hat Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Red Hat CodeReady Linux Builder for Power, little endian - 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/389-ds-base<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-debuginfo<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-debugsource<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-libs<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-libs-debuginfo<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-snmp<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-snmp-debuginfo<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/python3-lib389<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-debuginfo<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-debugsource<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-libs<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-libs-debuginfo<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-snmp<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-snmp-debuginfo<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-debuginfo<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-debugsource<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-libs<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-libs-debuginfo<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-snmp<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-snmp-debuginfo<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base<2.6.1-23.el9_6.aa
2.6.1-23.el9_6.aa
redhat/389-ds-base-debuginfo<2.6.1-23.el9_6.aa
2.6.1-23.el9_6.aa
redhat/389-ds-base-debugsource<2.6.1-23.el9_6.aa
2.6.1-23.el9_6.aa
redhat/389-ds-base-libs<2.6.1-23.el9_6.aa
2.6.1-23.el9_6.aa
redhat/389-ds-base-libs-debuginfo<2.6.1-23.el9_6.aa
2.6.1-23.el9_6.aa
redhat/389-ds-base-snmp<2.6.1-23.el9_6.aa
2.6.1-23.el9_6.aa
redhat/389-ds-base-snmp-debuginfo<2.6.1-23.el9_6.aa
2.6.1-23.el9_6.aa
redhat/389-ds-base-devel<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-devel<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-devel<2.6.1-23.el9_6
2.6.1-23.el9_6
redhat/389-ds-base-devel<2.6.1-23.el9_6.aa
2.6.1-23.el9_6.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/389-ds-base to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6
  2. Upgrade

    Upgrade redhat/389-ds-base-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6
  3. Upgrade

    Upgrade redhat/389-ds-base-debugsource to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6
  4. Upgrade

    Upgrade redhat/389-ds-base-libs to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6
  5. Upgrade

    Upgrade redhat/389-ds-base-libs-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6
  6. Upgrade

    Upgrade redhat/389-ds-base-snmp to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6
  7. Upgrade

    Upgrade redhat/389-ds-base-snmp-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6
  8. Upgrade

    Upgrade redhat/python3-lib389 to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6
  9. Upgrade

    Upgrade redhat/389-ds-base to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6.aa
  10. Upgrade

    Upgrade redhat/389-ds-base-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6.aa
  11. Upgrade

    Upgrade redhat/389-ds-base-debugsource to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6.aa
  12. Upgrade

    Upgrade redhat/389-ds-base-libs to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6.aa
  13. Upgrade

    Upgrade redhat/389-ds-base-libs-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6.aa
  14. Upgrade

    Upgrade redhat/389-ds-base-snmp to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6.aa
  15. Upgrade

    Upgrade redhat/389-ds-base-snmp-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6.aa
  16. Upgrade

    Upgrade redhat/389-ds-base-devel to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6
  17. Upgrade

    Upgrade redhat/389-ds-base-devel to a version that resolves this vulnerability.

    Fixed in 2.6.1-23.el9_6.aa
  18. Upgrade

    Upgrade 389-ds-base to a version that resolves this vulnerability.

    Patch CVE-2026-11788
  19. Upgrade

    Upgrade 389-ds-base to a version that resolves this vulnerability.

    Patch CVE-2026-15722
  20. Upgrade

    Upgrade 389-ds-base to a version that resolves this vulnerability.

    Patch CVE-2026-11770

Event History

Aug 17, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software
Advisory Published
via Red Hat·12:09 AM
Data Sourced
via Red Hat·12:09 AM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:55426?

The severity of RHSA-2026:55426 is classified as high with a CVSS score of 7.

2

How do I fix RHSA-2026:55426?

To fix RHSA-2026:55426, you should update the 389-ds-base packages to the latest version provided by Red Hat.

3

What vulnerabilities are addressed by RHSA-2026:55426?

RHSA-2026:55426 addresses a pre-auth LDAP filter injection vulnerability in the 389 Directory Server.

4

Is RHSA-2026:55426 a critical update for my servers?

Yes, due to its high severity rating, RHSA-2026:55426 is considered an important security update that should be applied promptly.

5

What software packages are affected by RHSA-2026:55426?

The affected software packages include redhat/389-ds-base and its associated libraries and utilities.

Company

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