RHSA-2026:55756: Important: 389-ds:1.4 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

14 affected componentsFixes available
Red Hat Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life
Red Hat Red Hat Enterprise Linux Server - AUS
redhat/389-ds-base<1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
redhat/389-ds-base<1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
redhat/389-ds-base-debuginfo<1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
redhat/389-ds-base-debugsource<1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
redhat/389-ds-base-devel<1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
redhat/389-ds-base-legacy-tools<1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
redhat/389-ds-base-legacy-tools-debuginfo<1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
redhat/389-ds-base-libs<1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
redhat/389-ds-base-libs-debuginfo<1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
redhat/389-ds-base-snmp<1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
redhat/389-ds-base-snmp-debuginfo<1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
redhat/python3-lib389<1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
1.4.3.34-11.module+el8.6.0+24647+ee33cdf8

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 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
  2. Upgrade

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

    Fixed in 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
  3. Upgrade

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

    Fixed in 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
  4. Upgrade

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

    Fixed in 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
  5. Upgrade

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

    Fixed in 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
  6. Upgrade

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

    Fixed in 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
  7. Upgrade

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

    Fixed in 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
  8. Upgrade

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

    Fixed in 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
  9. Upgrade

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

    Fixed in 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
  10. Upgrade

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

    Fixed in 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
  11. Upgrade

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

    Fixed in 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8
  12. Upgrade

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

    Patch CVE-2026-11770
  13. Upgrade

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

    Patch CVE-2026-11788
  14. Upgrade

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

    Patch CVE-2026-15722

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·02:40 PM
Data Sourced
via Red Hat·02:40 PM
Severity
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Frequently Asked Questions

1

What is the severity of RHSA-2026:55756?

The severity of RHSA-2026:55756 is classified as high with a score of 7.

2

How do I fix RHSA-2026:55756?

To fix RHSA-2026:55756, you need to update the affected 389-ds packages to the latest version provided by Red Hat.

3

What vulnerabilities are addressed in RHSA-2026:55756?

RHSA-2026:55756 addresses a pre-auth LDAP filter injection vulnerability in 389 Directory Server.

4

What software is affected by RHSA-2026:55756?

The affected software includes 389-ds-base packages within various Red Hat Enterprise Linux distributions.

5

Is RHSA-2026:55756 related to buffer overflows?

Yes, RHSA-2026:55756 is associated with vulnerabilities such as Buffer Overflow and Null Pointer Dereference.

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