- Issued:
- 2026-09-08
- Updated:
- 2026-09-08
RHSA-2026:64781 - Security Advisory
Synopsis
Critical: 389-ds-base security, bug fix, and enhancement update
Type/Severity
Security Advisory: Critical
Red Hat Lightspeed patch analysis
Identify and remediate systems affected by this advisory.
Topic
An update for 389-ds-base is now available for Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions.
Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
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: heap buffer overflow via SASL wrapped-record length lower-bound underflow in sasl_io_start_packet() (CVE-2026-18355)
- 389-ds-base: 389-ds-base: pre-authentication NULL pointer dereference via paged results and USE_ONE_BACKEND control in op_shared_search (CVE-2026-18453)
- 389-ds-base: 389-ds-base: SASL PLAIN authentication allows privilege escalation to Directory Manager via stale identity in Cyrus SASL auxiliary property (CVE-2026-18922)
- 389-ds-base: 389-ds: anonymous LDAP client can defeat SELFDN ACI bind-rule checks via empty bind DN (CVE-2026-76560)
Bug Fix(es) and Enhancement(s):
- lib389: set nsDS5ReplicaBindDNGroup before ensure_agreement() [rhel-9.4.z] (JIRA:RHEL-244465)
- fix breaks replication total init when nsDS5ReplicaBindDNGroup is set after agreement creation [rhel-9.4.z] (JIRA:RHEL-248764)
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.
Solution
For details on how to apply this update, which includes the changes described in this advisory, refer to:
Affected Products
- Red Hat Enterprise Linux Server - AUS 9.4 x86_64
- Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.4 ppc64le
- Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.4 x86_64
- Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.4 aarch64
- Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.4 s390x
- Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.4 x86_64
- Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.4 aarch64
- Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.4 ppc64le
- Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.4 s390x
Fixes
- BZ - 2509186 - CVE-2026-18355 389-ds-base: 389-ds-base: heap buffer overflow via SASL wrapped-record length lower-bound underflow in sasl_io_start_packet()
- BZ - 2509696 - CVE-2026-18453 389-ds-base: 389-ds-base: pre-authentication NULL pointer dereference via paged results and USE_ONE_BACKEND control in op_shared_search
- BZ - 2511388 - CVE-2026-18922 389-ds-base: 389-ds-base: SASL PLAIN authentication allows privilege escalation to Directory Manager via stale identity in Cyrus SASL auxiliary property
- BZ - 2519521 - CVE-2026-76560 389-ds-base: 389-ds: anonymous LDAP client can defeat SELFDN ACI bind-rule checks via empty bind DN
Red Hat Enterprise Linux Server - AUS 9.4
| SRPM | |
|---|---|
| 389-ds-base-2.4.5-29.el9_4.src.rpm | SHA-256: ee37377ea3c80eabe0e8e043ff33b842470f8608d68930f9033ce1aa3ef1f80a |
| x86_64 | |
| 389-ds-base-2.4.5-29.el9_4.x86_64.rpm | SHA-256: f59c7981ceb08a225f3068adc7df0d4529f6a22eb9ac06a21e56c82a7e25d90a |
| 389-ds-base-debuginfo-2.4.5-29.el9_4.x86_64.rpm | SHA-256: f2df256ae99ff07206bcd23a3aa7ab3630c0a5ea5a5f0f2a8f3e8c83f436da66 |
| 389-ds-base-debugsource-2.4.5-29.el9_4.x86_64.rpm | SHA-256: d1b66101e1f943b14057d1d8075da10771383b0ec3e4320462050ea38aa641b3 |
| 389-ds-base-libs-2.4.5-29.el9_4.x86_64.rpm | SHA-256: 35a03e5b55e9d10e7d8d0fa130eed9327c6d6309ec9b85f7c2231d43b01aa027 |
| 389-ds-base-libs-debuginfo-2.4.5-29.el9_4.x86_64.rpm | SHA-256: 5b978e95a4acdbe2d0275e0ab25e975f931e2c379189699a76324d062bc6b619 |
| 389-ds-base-snmp-debuginfo-2.4.5-29.el9_4.x86_64.rpm | SHA-256: f37246c41b0f66df3a6d2f213d70147efd3ba925f38cfeae1ed21a1c235384a6 |
| python3-lib389-2.4.5-29.el9_4.noarch.rpm | SHA-256: 954771e02e18a060910766472e86dbc0e41c3a80f8b930b4fea299bf9cd41fc3 |
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.4
| SRPM | |
|---|---|
| 389-ds-base-2.4.5-29.el9_4.src.rpm | SHA-256: ee37377ea3c80eabe0e8e043ff33b842470f8608d68930f9033ce1aa3ef1f80a |
| ppc64le | |
| 389-ds-base-2.4.5-29.el9_4.ppc64le.rpm | SHA-256: 536cb2542a33f0ce998ee52e3c41df0be60a0c0901fe420fbdb4a64ac70ca598 |
| 389-ds-base-debuginfo-2.4.5-29.el9_4.ppc64le.rpm | SHA-256: 160e1b542cf166e333121e96e8f7d65f8b97069c61207b1c7ac4402fb79a77d3 |
| 389-ds-base-debugsource-2.4.5-29.el9_4.ppc64le.rpm | SHA-256: f9b39a30a0888d93be6ec2083826ec1fd9a511bf989e2748914b32fcf6c1d9d0 |
| 389-ds-base-libs-2.4.5-29.el9_4.ppc64le.rpm | SHA-256: 9643e7c815972e643a18ad79157469930ad0e71b377591d2736aa095eb997841 |
| 389-ds-base-libs-debuginfo-2.4.5-29.el9_4.ppc64le.rpm | SHA-256: f74c5c691fa53cb1f503e4ca5f2dc4cae3fd1350809a2fc8fd36d3d3ee9d4c1e |
| 389-ds-base-snmp-debuginfo-2.4.5-29.el9_4.ppc64le.rpm | SHA-256: 0af03cb1e18d4571656532a78547a328c0c18c393bf858bdbe85e1b67a453fbc |
| python3-lib389-2.4.5-29.el9_4.noarch.rpm | SHA-256: 954771e02e18a060910766472e86dbc0e41c3a80f8b930b4fea299bf9cd41fc3 |
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.4
| SRPM | |
|---|---|
| 389-ds-base-2.4.5-29.el9_4.src.rpm | SHA-256: ee37377ea3c80eabe0e8e043ff33b842470f8608d68930f9033ce1aa3ef1f80a |
| x86_64 | |
| 389-ds-base-2.4.5-29.el9_4.x86_64.rpm | SHA-256: f59c7981ceb08a225f3068adc7df0d4529f6a22eb9ac06a21e56c82a7e25d90a |
| 389-ds-base-debuginfo-2.4.5-29.el9_4.x86_64.rpm | SHA-256: f2df256ae99ff07206bcd23a3aa7ab3630c0a5ea5a5f0f2a8f3e8c83f436da66 |
| 389-ds-base-debugsource-2.4.5-29.el9_4.x86_64.rpm | SHA-256: d1b66101e1f943b14057d1d8075da10771383b0ec3e4320462050ea38aa641b3 |
| 389-ds-base-libs-2.4.5-29.el9_4.x86_64.rpm | SHA-256: 35a03e5b55e9d10e7d8d0fa130eed9327c6d6309ec9b85f7c2231d43b01aa027 |
| 389-ds-base-libs-debuginfo-2.4.5-29.el9_4.x86_64.rpm | SHA-256: 5b978e95a4acdbe2d0275e0ab25e975f931e2c379189699a76324d062bc6b619 |
| 389-ds-base-snmp-debuginfo-2.4.5-29.el9_4.x86_64.rpm | SHA-256: f37246c41b0f66df3a6d2f213d70147efd3ba925f38cfeae1ed21a1c235384a6 |
| python3-lib389-2.4.5-29.el9_4.noarch.rpm | SHA-256: 954771e02e18a060910766472e86dbc0e41c3a80f8b930b4fea299bf9cd41fc3 |
Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.4
| SRPM | |
|---|---|
| 389-ds-base-2.4.5-29.el9_4.src.rpm | SHA-256: ee37377ea3c80eabe0e8e043ff33b842470f8608d68930f9033ce1aa3ef1f80a |
| aarch64 | |
| 389-ds-base-2.4.5-29.el9_4.aarch64.rpm | SHA-256: b099c61c73372354be131f64cf14e59b21a6be2e0f4034c43126a6761a22fb98 |
| 389-ds-base-debuginfo-2.4.5-29.el9_4.aarch64.rpm | SHA-256: f8d0ca30aead472610992188793c2e87807441eb1b7bcacff8972e911551375b |
| 389-ds-base-debugsource-2.4.5-29.el9_4.aarch64.rpm | SHA-256: 5a1807e0c27beda9e5031b0f57a1d805824e54ba2907aadadd549ec2fa2a4cad |
| 389-ds-base-libs-2.4.5-29.el9_4.aarch64.rpm | SHA-256: ae18fa7d5d62ca37d889a6989bf6cc79debf16c8e0bea3227a64cb87a77e0273 |
| 389-ds-base-libs-debuginfo-2.4.5-29.el9_4.aarch64.rpm | SHA-256: 020ccca3b64a39af8dad26124b100005c6778841e3167a2cd18bec783bda374f |
| 389-ds-base-snmp-debuginfo-2.4.5-29.el9_4.aarch64.rpm | SHA-256: cc17cac8af07b0534bd51023edc79dc9be3a5888dd5806b5307e5fc042691c6f |
| python3-lib389-2.4.5-29.el9_4.noarch.rpm | SHA-256: 954771e02e18a060910766472e86dbc0e41c3a80f8b930b4fea299bf9cd41fc3 |
Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.4
| SRPM | |
|---|---|
| 389-ds-base-2.4.5-29.el9_4.src.rpm | SHA-256: ee37377ea3c80eabe0e8e043ff33b842470f8608d68930f9033ce1aa3ef1f80a |
| s390x | |
| 389-ds-base-2.4.5-29.el9_4.s390x.rpm | SHA-256: fb72a467a13fe58499d148ef286837e7d28289267c555298be4a04f7e0f8ed13 |
| 389-ds-base-debuginfo-2.4.5-29.el9_4.s390x.rpm | SHA-256: 11cc6477c4202eb5bfa7e3f2fa79f440defabd135f6fddcff63aad48d9246c14 |
| 389-ds-base-debugsource-2.4.5-29.el9_4.s390x.rpm | SHA-256: dab6047c9cbd51fab8efdcbb139bcf43c141f282324d56d529952753d808bb72 |
| 389-ds-base-libs-2.4.5-29.el9_4.s390x.rpm | SHA-256: c007afc22347588c0ef8cc8f06330be00f0752b4b642c8918c5b3261a7904c2d |
| 389-ds-base-libs-debuginfo-2.4.5-29.el9_4.s390x.rpm | SHA-256: 3d62883ce23aaf62824852b7e9f94c83596c4695fb7c8a6c33530ac9cefd8cdb |
| 389-ds-base-snmp-debuginfo-2.4.5-29.el9_4.s390x.rpm | SHA-256: 0ed19b48e3be99dc944e8422c94b2945bc0126a75e8526e40ed8fecf7917b6f0 |
| python3-lib389-2.4.5-29.el9_4.noarch.rpm | SHA-256: 954771e02e18a060910766472e86dbc0e41c3a80f8b930b4fea299bf9cd41fc3 |
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.4
| SRPM | |
|---|---|
| 389-ds-base-2.4.5-29.el9_4.src.rpm | SHA-256: ee37377ea3c80eabe0e8e043ff33b842470f8608d68930f9033ce1aa3ef1f80a |
| x86_64 | |
| 389-ds-base-2.4.5-29.el9_4.x86_64.rpm | SHA-256: f59c7981ceb08a225f3068adc7df0d4529f6a22eb9ac06a21e56c82a7e25d90a |
| 389-ds-base-debuginfo-2.4.5-29.el9_4.x86_64.rpm | SHA-256: f2df256ae99ff07206bcd23a3aa7ab3630c0a5ea5a5f0f2a8f3e8c83f436da66 |
| 389-ds-base-debugsource-2.4.5-29.el9_4.x86_64.rpm | SHA-256: d1b66101e1f943b14057d1d8075da10771383b0ec3e4320462050ea38aa641b3 |
| 389-ds-base-libs-2.4.5-29.el9_4.x86_64.rpm | SHA-256: 35a03e5b55e9d10e7d8d0fa130eed9327c6d6309ec9b85f7c2231d43b01aa027 |
| 389-ds-base-libs-debuginfo-2.4.5-29.el9_4.x86_64.rpm | SHA-256: 5b978e95a4acdbe2d0275e0ab25e975f931e2c379189699a76324d062bc6b619 |
| 389-ds-base-snmp-debuginfo-2.4.5-29.el9_4.x86_64.rpm | SHA-256: f37246c41b0f66df3a6d2f213d70147efd3ba925f38cfeae1ed21a1c235384a6 |
| python3-lib389-2.4.5-29.el9_4.noarch.rpm | SHA-256: 954771e02e18a060910766472e86dbc0e41c3a80f8b930b4fea299bf9cd41fc3 |
Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.4
| SRPM | |
|---|---|
| 389-ds-base-2.4.5-29.el9_4.src.rpm | SHA-256: ee37377ea3c80eabe0e8e043ff33b842470f8608d68930f9033ce1aa3ef1f80a |
| aarch64 | |
| 389-ds-base-2.4.5-29.el9_4.aarch64.rpm | SHA-256: b099c61c73372354be131f64cf14e59b21a6be2e0f4034c43126a6761a22fb98 |
| 389-ds-base-debuginfo-2.4.5-29.el9_4.aarch64.rpm | SHA-256: f8d0ca30aead472610992188793c2e87807441eb1b7bcacff8972e911551375b |
| 389-ds-base-debugsource-2.4.5-29.el9_4.aarch64.rpm | SHA-256: 5a1807e0c27beda9e5031b0f57a1d805824e54ba2907aadadd549ec2fa2a4cad |
| 389-ds-base-libs-2.4.5-29.el9_4.aarch64.rpm | SHA-256: ae18fa7d5d62ca37d889a6989bf6cc79debf16c8e0bea3227a64cb87a77e0273 |
| 389-ds-base-libs-debuginfo-2.4.5-29.el9_4.aarch64.rpm | SHA-256: 020ccca3b64a39af8dad26124b100005c6778841e3167a2cd18bec783bda374f |
| 389-ds-base-snmp-debuginfo-2.4.5-29.el9_4.aarch64.rpm | SHA-256: cc17cac8af07b0534bd51023edc79dc9be3a5888dd5806b5307e5fc042691c6f |
| python3-lib389-2.4.5-29.el9_4.noarch.rpm | SHA-256: 954771e02e18a060910766472e86dbc0e41c3a80f8b930b4fea299bf9cd41fc3 |
Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.4
| SRPM | |
|---|---|
| 389-ds-base-2.4.5-29.el9_4.src.rpm | SHA-256: ee37377ea3c80eabe0e8e043ff33b842470f8608d68930f9033ce1aa3ef1f80a |
| ppc64le | |
| 389-ds-base-2.4.5-29.el9_4.ppc64le.rpm | SHA-256: 536cb2542a33f0ce998ee52e3c41df0be60a0c0901fe420fbdb4a64ac70ca598 |
| 389-ds-base-debuginfo-2.4.5-29.el9_4.ppc64le.rpm | SHA-256: 160e1b542cf166e333121e96e8f7d65f8b97069c61207b1c7ac4402fb79a77d3 |
| 389-ds-base-debugsource-2.4.5-29.el9_4.ppc64le.rpm | SHA-256: f9b39a30a0888d93be6ec2083826ec1fd9a511bf989e2748914b32fcf6c1d9d0 |
| 389-ds-base-libs-2.4.5-29.el9_4.ppc64le.rpm | SHA-256: 9643e7c815972e643a18ad79157469930ad0e71b377591d2736aa095eb997841 |
| 389-ds-base-libs-debuginfo-2.4.5-29.el9_4.ppc64le.rpm | SHA-256: f74c5c691fa53cb1f503e4ca5f2dc4cae3fd1350809a2fc8fd36d3d3ee9d4c1e |
| 389-ds-base-snmp-debuginfo-2.4.5-29.el9_4.ppc64le.rpm | SHA-256: 0af03cb1e18d4571656532a78547a328c0c18c393bf858bdbe85e1b67a453fbc |
| python3-lib389-2.4.5-29.el9_4.noarch.rpm | SHA-256: 954771e02e18a060910766472e86dbc0e41c3a80f8b930b4fea299bf9cd41fc3 |
Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.4
| SRPM | |
|---|---|
| 389-ds-base-2.4.5-29.el9_4.src.rpm | SHA-256: ee37377ea3c80eabe0e8e043ff33b842470f8608d68930f9033ce1aa3ef1f80a |
| s390x | |
| 389-ds-base-2.4.5-29.el9_4.s390x.rpm | SHA-256: fb72a467a13fe58499d148ef286837e7d28289267c555298be4a04f7e0f8ed13 |
| 389-ds-base-debuginfo-2.4.5-29.el9_4.s390x.rpm | SHA-256: 11cc6477c4202eb5bfa7e3f2fa79f440defabd135f6fddcff63aad48d9246c14 |
| 389-ds-base-debugsource-2.4.5-29.el9_4.s390x.rpm | SHA-256: dab6047c9cbd51fab8efdcbb139bcf43c141f282324d56d529952753d808bb72 |
| 389-ds-base-libs-2.4.5-29.el9_4.s390x.rpm | SHA-256: c007afc22347588c0ef8cc8f06330be00f0752b4b642c8918c5b3261a7904c2d |
| 389-ds-base-libs-debuginfo-2.4.5-29.el9_4.s390x.rpm | SHA-256: 3d62883ce23aaf62824852b7e9f94c83596c4695fb7c8a6c33530ac9cefd8cdb |
| 389-ds-base-snmp-debuginfo-2.4.5-29.el9_4.s390x.rpm | SHA-256: 0ed19b48e3be99dc944e8422c94b2945bc0126a75e8526e40ed8fecf7917b6f0 |
| python3-lib389-2.4.5-29.el9_4.noarch.rpm | SHA-256: 954771e02e18a060910766472e86dbc0e41c3a80f8b930b4fea299bf9cd41fc3 |
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