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ALSA-2026:26455 — Important: 389-ds-base security, bug fix, and enhancement update

Affected: AlmaLinux:9: 389-ds-base, AlmaLinux:9: 389-ds-base-devel, AlmaLinux:9: 389-ds-base-libs, AlmaLinux:9: 389-ds-base-snmp, AlmaLinux:9: python3-lib389

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: unbounded LDAP controls count in get_ldapmessage_controls_ext() causes CPU and heap amplification (remote DoS) (CVE-2026-9064)

Bug Fix(es) and Enhancement(s):

* Getting "build_candidate_list - Database error 11" messages after migrating to LMDB. [almalinux-9.8.z] (JIRA:AlmaLinux-152356) * Web console doesn't show the sub suffix of ou=foo,ou=people,dc=example,dc=com. [almalinux-9.8.z] (JIRA:AlmaLinux-168967) * DS 12 does not handle escape char in bind user [almalinux-9.8.z] (JIRA:AlmaLinux-170269) * [RFE] Add OS-level thread names to all server threads [almalinux-9.8.z] (JIRA:AlmaLinux-174524) * Online export is failing when using the option "-s" [almalinux-9.8.z] (JIRA:AlmaLinux-180716) * Server shutdown during online reindex may lead to data loss [almalinux-9.8.z] (JIRA:AlmaLinux-183895)

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.

bdu:2026-12878

EUVD-2026-357263

fkie_cve-2026-9064

A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function in the LDAP server does not enforce an upper bound on the number of controls per LDAP message. A remote, unauthenticated attacker can send a specially crafted LDAP request containing hundreds of thousands of minimal controls within the default maximum BER message size (2 MB), causing excessive CPU consumption and heap allocation on the server. Under concurrent exploitation, this leads to significant latency degradation, worker thread starvation, or out-of-memory termination, resulting in a denial of service.

GHSA-7r3c-wfgh-x96c

OESA-2026-3128 — 389-ds-base security update

Affected: openEuler:22.03-LTS-SP4: 389-ds-base

389-ds-base is an LDAPv3 compliant server which includes the LDAP server and command line utilities for server administration. Security Fix(es):

openSUSE-SU-2026:21011-1 — Security update for 389-ds

Security update for 389-ds

RHSA-2026:26452 — Red Hat Security Advisory: 389-ds-base security update

389-ds-base: 389-ds-base: unbounded LDAP controls count in get_ldapmessage_controls_ext() causes CPU and heap amplification (remote DoS)

RLSA-2026:26455 — Important: 389-ds-base security, bug fix, and enhancement update

Affected: Rocky Linux:9: 389-ds-base

Security Fix(es):

* 389-ds-base: 389-ds-base: unbounded LDAP controls count in get_ldapmessage_controls_ext() causes CPU and heap amplification (remote DoS) (CVE-2026-9064)

Bug Fix(es) and Enhancement(s):

* Getting "build_candidate_list - Database error 11" messages after migrating to LMDB. [rhel-9.8.z] (JIRA:Rocky Linux-152356)

* Web console doesn't show the sub suffix of ou=foo,ou=people,dc=example,dc=com. [rhel-9.8.z] (JIRA:Rocky Linux-168967)

* DS 12 does not handle escape char in bind user [rhel-9.8.z] (JIRA:Rocky Linux-170269)

* [RFE] Add OS-level thread names to all server threads [rhel-9.8.z] (JIRA:Rocky Linux-174524)

* Online export is failing when using the option "-s" [rhel-9.8.z] (JIRA:Rocky Linux-180716)

* Server shutdown during online reindex may lead to data loss [rhel-9.8.z] (JIRA:Rocky Linux-183895)

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.

SUSE-SU-2026:22333-1 — Security update for 389-ds

Security update for 389-ds

UBUNTU-CVE-2026-9064

Affected: Ubuntu:Pro:16.04:LTS: 389-ds-base, Ubuntu:Pro:18.04:LTS: 389-ds-base, Ubuntu:Pro:20.04:LTS: 389-ds-base, Ubuntu:22.04:LTS: 389-ds-base, Ubuntu:24.04:LTS: 389-ds-base, Ubuntu:25.10: 389-ds-base, Ubuntu:26.04:LTS: 389-ds-base

WID-SEC-W-2026-1957 — Red Hat Enterprise Linux (openCryptoki, hplip, 389-ds-base): Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um einen Denial of Service Angriff durchzuführen, vertrauliche Informationen offenzulegen, erweiterte Berechtigungen zu erlangen oder beliebigen Code auszuführen.