Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | 389-ds-base | — | — |
| Red Hat | Red Hat Directory Server 11.5 E4S for RHEL 8 | — | — |
| Red Hat | Red Hat Directory Server 11.7 E4S for RHEL 8 | — | — |
| Red Hat | Red Hat Directory Server 11.9 for RHEL 8 | — | — |
| Red Hat | Red Hat Directory Server 12.2 E4S for RHEL 9 | — | — |
| Red Hat | Red Hat Directory Server 12.4 E4S for RHEL 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | — |
| Red Hat | Red Hat Directory Server 13.2 | — | — |
| Red Hat | Red Hat Directory Server 12 | — | — |
| Red Hat | Red Hat Directory Server 13 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | 389-ds-base | No fix yet | — |
| Debian 12 | 389-ds-base | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | 389-ds-base | No fix yet | — |
| Ubuntu 26.04 LTS | 389-ds-base | No fix yet | — |
| Ubuntu 25.10 | 389-ds-base | No fix yet | — |
| Ubuntu 24.04 LTS | 389-ds-base | No fix yet | — |
| Ubuntu 22.04 LTS | 389-ds-base | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | 389-ds-base | No fix yet | — |
| Ubuntu Pro 18.04 LTS | 389-ds-base | No fix yet | — |
| Ubuntu Pro 16.04 LTS | 389-ds-base | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | 389-ds-base +5 | 3.2.0-7.el10_2 | RHSA-2026:26456 |
| RHEL 9 | 389-ds-base +4 | 2.8.0-7.el9_8 | RHSA-2026:26455 |
| RHEL 8 | 389-ds-base +5 | 1.4.3.39-24.module+el8.10.0+24340+7270ac72 | RHSA-2026:26459 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | 389-ds-base +5 | 3.0.6-18.el10_0 | RHSA-2026:26457 |
| RHEL 9.6 EUS | 389-ds-base +4 | 2.6.1-21.el9_6 | RHSA-2026:26465 |
| RHEL 9.4 E4S | 389-ds-base +2 | 2.4.5-25.el9_4 | RHSA-2026:26464 |
| RHEL 9.2 E4S | 389-ds-base +2 | 2.2.4-18.el9_2 | RHSA-2026:26452 |
| RHEL 8.8 TUS | 389-ds-base +5 | 1.4.3.35-18.module+el8.8.0+24377+19c5500b | RHSA-2026:26454 |
| RHEL 8.8 E4S | 389-ds-base +5 | 1.4.3.35-18.module+el8.8.0+24377+19c5500b | RHSA-2026:26454 |
| RHEL 8.6 EUS Long Life | 389-ds-base +5 | 1.4.3.34-9.module+el8.6.0+24371+47116d61 | RHSA-2026:26460 |
| RHEL 8.6 AUS | 389-ds-base +5 | 1.4.3.34-9.module+el8.6.0+24371+47116d61 | RHSA-2026:26460 |
| RHEL 8.4 EUS Long Life | 389-ds-base +5 | 1.4.3.34-4.module+el8.4.0+24372+0c6355a1 | RHSA-2026:26463 |
| RHEL 8.4 AUS | 389-ds-base +5 | 1.4.3.34-4.module+el8.4.0+24372+0c6355a1 | RHSA-2026:26463 |
| RHEL 7 ELS | 389-ds-base +3 | 1.3.11.1-12.el7_9 | RHSA-2026:26453 |
| Red Hat Directory Server E4s 12 | 389-ds-base +5 | 2.2.7-15.module+el9dsrv+24397+ec2d72b6 | RHSA-2026:26639, RHSA-2026:26599 |
| Red Hat Directory Server E4s 11 | 389-ds-base +6 | 1.4.3.34-6.module+el8dsrv+24373+7e48d0d8 | RHSA-2026:26597, RHSA-2026:26461 |
| Red Hat Directory Server 11 | 389-ds-base +6 | 1.4.3.39-24.module+el8dsrv+24341+2b6b9665 | RHSA-2026:26458 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | 389-ds-base +4 | 2.8.0-7.el9_8 | ALSA-2026:26455 |
| AlmaLinux 8 | 389-ds-base +5 | 1.4.3.39-24.module_el8.10.0+4196+be88fbc7 | ALSA-2026:26459 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | 389-ds-base | 3.2.0-7.el10_2 | RLSA-2026:26456 |
| Rocky Linux 9 | 389-ds-base | 2.8.0-7.el9_8 | RLSA-2026:26455 |
| Rocky Linux 8 | 389-ds-base | 1.4.3.39-24.module+el8.10.0+40214+a8ec6bf9 | RLSA-2026:26459 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | 389-ds | 2.7.0~git193.9ab79d496-150700.3.16.1 | SUSE-SU-2026:2419-1 |
| SLES 15 SP6 | 389-ds | 2.2.10~git229.1fa7ffdb4-150600.8.29.1 | SUSE-SU-2026:2418-1 |
| SLES 15 SP5 | 389-ds | 2.2.10~git229.1fa7ffdb4-150500.3.45.1 | SUSE-SU-2026:2417-1 |
| SLES 15 SP4 | 389-ds | 2.0.20~git90.9f70d434e-150400.3.51.1 | SUSE-SU-2026:2316-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | 389-ds | 2.2.10~git229.1fa7ffdb4-150600.8.29.1 | SUSE-SU-2026:2418-1 |
| SLES for SAP 15 SP5 | 389-ds | 2.2.10~git229.1fa7ffdb4-150500.3.45.1 | SUSE-SU-2026:2417-1 |
| SLES for SAP 15 SP4 | 389-ds | 2.0.20~git90.9f70d434e-150400.3.51.1 | SUSE-SU-2026:2316-1 |
| SLE HPC 15 SP5 | 389-ds | 2.2.10~git229.1fa7ffdb4-150500.3.45.1 | SUSE-SU-2026:2417-1 |
| SLE HPC 15 SP4 | 389-ds | 2.0.20~git90.9f70d434e-150400.3.51.1 | SUSE-SU-2026:2316-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | 389-ds | 3.1.4+e9d94d45a-1.1 | openSUSE-SU-2026:10870-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | 389-ds-base +3 | 1.3.10.2-17.amzn2.0.6 | ALAS2-2026-3339 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | 389-ds-base +5 | 3.2.0-8.el10_2 | ELSA-2026-26456 |
| Oracle Linux 9 | 389-ds-base +4 | 2.8.0-7.el9_8 | ELSA-2026-26455 |
| Oracle Linux 8 | 389-ds-base +5 | 1.4.3.39-24.module+el8.10.0+90914+745232ac | ELSA-2026-26459 |
| Oracle Linux 7 | 389-ds-base +3 | 1.3.11.1-5.0.9.el7_9 | ELSA-2026-26453 |
Advisories 32
- ALSA-2026:26455 Important: 389-ds-base security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:26459 Important: 389-ds:1.4 security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-1957 Red Hat Enterprise Linux (openCryptoki, hplip, 389-ds-base): Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 14, 2026
- RHSA-2026:26597 Red Hat Security Advisory: redhat-ds:11 security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26599 Red Hat Security Advisory: redhat-ds:12 security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26639 Red Hat Security Advisory: redhat-ds:12 security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26464 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26465 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26463 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26460 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26461 Red Hat Security Advisory: redhat-ds:11 security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26458 Red Hat Security Advisory: redhat-ds:11 security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26459 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26456 Red Hat Security Advisory: 389-ds-base security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26457 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26455 Red Hat Security Advisory: 389-ds-base security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26454 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26452 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- RHSA-2026:26453 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Aug 22, 2026
- ELSA-2026-26456 Important: 389-ds-base security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 21, 2026
- ELSA-2026-26453 Important: 389-ds-base security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 14, 2026
- ELSA-2026-26455 Important: 389-ds-base security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 23, 2026
- RLSA-2026:26456 Important: 389-ds-base security, bug fix, and enhancement update Rocky Linux Security Advisories · Jun 19, 2026
- RLSA-2026:26459 Important: 389-ds:1.4 security update Rocky Linux Security Advisories · Jun 19, 2026
- ELSA-2026-26459 Important: 389-ds:1.4 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jun 18, 2026
- RLSA-2026:26455 Important: 389-ds-base security, bug fix, and enhancement update Rocky Linux Security Advisories · Jun 17, 2026
- SUSE-SU-2026:2419-1 Security update for 389-ds SUSE / openSUSE Security Updates · Jun 17, 2026
- SUSE-SU-2026:2418-1 Security update for 389-ds SUSE / openSUSE Security Updates · Jun 17, 2026
- SUSE-SU-2026:2417-1 Security update for 389-ds SUSE / openSUSE Security Updates · Jun 17, 2026
- SUSE-SU-2026:2316-1 Security update for 389-ds SUSE / openSUSE Security Updates · Jun 10, 2026
- ALAS2-2026-3339 Important: 389-ds-base security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jun 8, 2026
- openSUSE-SU-2026:10870-1 389-ds-3.1.4+e9d94d45a-1.1 on GA media SUSE / openSUSE Security Updates · May 29, 2026
References
- RHSA-2026:26452 vendor-advisory
- RHSA-2026:26453 vendor-advisory
- RHSA-2026:26454 vendor-advisory
- RHSA-2026:26455 vendor-advisory
- RHSA-2026:26456 vendor-advisory
- RHSA-2026:26457 vendor-advisory
- RHSA-2026:26458 vendor-advisory
- RHSA-2026:26459 vendor-advisory
- RHSA-2026:26460 vendor-advisory
- RHSA-2026:26461 vendor-advisory
- RHSA-2026:26463 vendor-advisory
- RHSA-2026:26464 vendor-advisory
- RHSA-2026:26465 vendor-advisory
- RHSA-2026:26597 vendor-advisory
- RHSA-2026:26599 vendor-advisory
- RHSA-2026:26639 vendor-advisory
- RHSA-2026:27125 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-9064 vdb-entry
- RHBZ#2480093 issue-tracking