Description
A flaw was found in the 389-ds-base server. A heap buffer overflow vulnerability exists in the `schema_attr_enum_callback` function within the `schema.c` file. This occurs because the code incorrectly calculates the buffer size by summing alias string lengths without accounting for additional formatting characters. When a large number of aliases are processed, this oversight can lead to a heap overflow, potentially allowing a remote attacker to cause a Denial of Service (DoS) or achieve Remote Code Execution (RCE).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| 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 EUS 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 8.2 Advanced Update Support | — | — |
| 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 Telecommunications Update Service | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions | — | — |
| 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 9.0 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | — |
| Red Hat | Red Hat Directory Server 13.1 | — | — |
| 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 | 3.1.2+dfsg1-1+deb13u1 | — |
| 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 | 3.1.3-7.el10_1 | RHSA-2026:3208 |
| RHEL 9 | 389-ds-base +4 | 2.7.0-10.el9_7 | RHSA-2026:3189 |
| RHEL 8 | 389-ds-base +5 | 1.4.3.39-23.module+el8.10.0+24085+b368a310 | RHSA-2026:5513 |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | 389-ds-base +5 | 3.0.6-17.el10_0 | RHSA-2026:3504 |
| RHEL 9.6 EUS | 389-ds-base +4 | 2.6.1-20.el9_6 | RHSA-2026:4207 |
| RHEL 9.4 EUS | 389-ds-base +3 | 2.4.5-24.el9_4 | RHSA-2026:4720 |
| RHEL 9.2 E4S | 389-ds-base +2 | 2.2.4-17.el9_2 | RHSA-2026:5598 |
| RHEL 9.0 E4S | 389-ds-base +2 | 2.0.14-5.el9_0 | RHSA-2026:5597 |
| RHEL 8.8 TUS | 389-ds-base +5 | 1.4.3.35-17.module+el8.8.0+24040+93041464 | RHSA-2026:5576 |
| RHEL 8.8 E4S | 389-ds-base +5 | 1.4.3.35-17.module+el8.8.0+24040+93041464 | RHSA-2026:5576 |
| RHEL 8.6 TUS | 389-ds-base +5 | 1.4.3.34-8.module+el8.6.0+24051+60483925 | RHSA-2026:5511 |
| RHEL 8.6 E4S | 389-ds-base +5 | 1.4.3.34-8.module+el8.6.0+24051+60483925 | RHSA-2026:5511 |
| RHEL 8.6 AUS | 389-ds-base +5 | 1.4.3.34-8.module+el8.6.0+24051+60483925 | RHSA-2026:5511 |
| RHEL 8.4 EUS Long Life | 389-ds-base +5 | 1.4.3.34-3.module+el8.4.0+24054+665bc8dc | RHSA-2026:6268 |
| RHEL 8.4 AUS | 389-ds-base +5 | 1.4.3.34-3.module+el8.4.0+24054+665bc8dc | RHSA-2026:6268 |
| RHEL 8.2 AUS | 389-ds-base +5 | 1.4.2.4-19.module+el8.2.0+24058+ed9808c7 | RHSA-2026:5196 |
| RHEL 7 ELS | 389-ds-base +3 | 1.3.11.1-11.el7_9 | RHSA-2026:6220 |
| Red Hat Directory Server Eus 12 | 389-ds-base +5 | 2.4.5-22.module+el9dsrv+24021+288fb6da | RHSA-2026:4661 |
| Red Hat Directory Server E4s 12 | 389-ds-base +5 | 2.2.7-14.module+el9dsrv+24059+d750c81f | RHSA-2026:5569 |
| Red Hat Directory Server E4s 11 | 389-ds-base +6 | 1.4.3.34-5.module+el8dsrv+24053+0eac3b1a | RHSA-2026:5568, RHSA-2026:5512 |
| Red Hat Directory Server 11 | 389-ds-base +6 | 1.4.3.39-21.module+el8dsrv+24083+d25fcbb4 | RHSA-2026:5514 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | python3-lib389 | 3.1.3-7.el10_1 | ALSA-2026:3208 |
| AlmaLinux 9 | 389-ds-base +4 | 2.7.0-10.el9_7 | ALSA-2026:3189 |
| AlmaLinux 8 | 389-ds-base +5 | 1.4.3.39-23.module_el8.10.0+4139+ef6adba4 | ALSA-2026:5513 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | 389-ds-base | 3.1.3-7.el10_1 | RLSA-2026:3208 |
| Rocky Linux 9 | 389-ds-base | 2.7.0-10.el9_7 | RLSA-2026:3189 |
| Rocky Linux 8 | 389-ds-base | 1.4.3.39-23.module+el8.10.0+40135+69dd2a79 | RLSA-2026:5513 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | 389-ds | 2.7.0~git144.f597a91d8-150700.3.13.1 | SUSE-SU-2026:0915-1 |
| SLES 15 SP6 | 389-ds | 2.2.10~git200.96444f3c3-150600.8.26.1 | SUSE-SU-2026:0914-1 |
| SLES 15 SP5 | 389-ds | 2.2.10~git200.96444f3c3-150500.3.42.1 | SUSE-SU-2026:0913-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | 389-ds | 3.0.6~git249.6688af9b2-160000.1.1 | SUSE-SU-2026:20927-1 |
| SLES for SAP 15 SP6 | 389-ds | 2.2.10~git200.96444f3c3-150600.8.26.1 | SUSE-SU-2026:0914-1 |
| SLES for SAP 15 SP5 | 389-ds | 2.2.10~git200.96444f3c3-150500.3.42.1 | SUSE-SU-2026:0913-1 |
| SLES 16.0 | 389-ds | 3.0.6~git249.6688af9b2-160000.1.1 | SUSE-SU-2026:20927-1 |
| SLE HPC 15 SP5 | 389-ds | 2.2.10~git200.96444f3c3-150500.3.42.1 | SUSE-SU-2026:0913-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | 389-ds | 3.1.4+e2562f589-1.1 | openSUSE-SU-2026:10500-1 |
| openSUSE Leap 16.0 | 389-ds | 3.0.6~git249.6688af9b2-160000.1.1 | openSUSE-SU-2026:20415-1 |
| openSUSE Leap 15.6 | 389-ds | 2.2.10~git200.96444f3c3-150600.8.26.1 | SUSE-SU-2026:0914-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | 389-ds-base +3 | 1.3.10.2-17.amzn2.0.5 | ALAS2-2026-3205 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | 389-ds-base | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | 389-ds-base +5 | 3.1.3-7.el10_1 | ELSA-2026-3208 |
| Oracle Linux 9 | 389-ds-base +4 | 2.7.0-10.el9_7 | ELSA-2026-3189 |
| Oracle Linux 8 | 389-ds-base +5 | 1.4.3.39-23.module+el8.10.0+90848+e0e1b1b6 | ELSA-2026-5513 |
| Oracle Linux 7 | 389-ds-base +3 | 1.3.11.1-5.0.7.el7_9 | ELSA-2026-6220 |
Advisories 36
- ALSA-2026:3189 Moderate: 389-ds-base security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:3208 Moderate: 389-ds-base security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:5513 Moderate: 389-ds:1.4 security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-0494 Red Hat Enterprise Linux (389-ds-base): Schwachstelle ermöglicht Codeausführung und potenziell Denial of Service BSI CERT-Bund (WID) · Oct 14, 2026
- RHSA-2026:6268 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:6220 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:5598 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:5597 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:5576 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:5568 Red Hat Security Advisory: redhat-ds:11 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:5569 Red Hat Security Advisory: redhat-ds:12 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:5513 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:5514 Red Hat Security Advisory: redhat-ds:11 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:5511 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:5512 Red Hat Security Advisory: redhat-ds:11 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:5196 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:4720 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:4661 Red Hat Security Advisory: redhat-ds:12 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:4207 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:3504 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:3208 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:3189 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- ELSA-2026-6220 Moderate: 389-ds-base security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 16, 2026
- openSUSE-SU-2026:10500-1 389-ds-3.1.4+e2562f589-1.1 on GA media SUSE / openSUSE Security Updates · Apr 9, 2026
- RLSA-2026:5513 Moderate: 389-ds:1.4 security update Rocky Linux Security Advisories · Apr 7, 2026
- SUSE-SU-2026:20927-1 Security update for 389-ds SUSE / openSUSE Security Updates · Apr 2, 2026
- openSUSE-SU-2026:20415-1 Security update for 389-ds SUSE / openSUSE Security Updates · Mar 29, 2026
- ELSA-2026-5513 Moderate: 389-ds:1.4 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Mar 24, 2026
- ALAS2-2026-3205 Important: 389-ds-base security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 19, 2026
- SUSE-SU-2026:0913-1 Security update for 389-ds SUSE / openSUSE Security Updates · Mar 19, 2026
- SUSE-SU-2026:0914-1 Security update for 389-ds SUSE / openSUSE Security Updates · Mar 19, 2026
- SUSE-SU-2026:0915-1 Security update for 389-ds SUSE / openSUSE Security Updates · Mar 19, 2026
- RLSA-2026:3189 Moderate: 389-ds-base security update Rocky Linux Security Advisories · Feb 26, 2026
- RLSA-2026:3208 Moderate: 389-ds-base security update Rocky Linux Security Advisories · Feb 26, 2026
- ELSA-2026-3208 Moderate: 389-ds-base security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Feb 24, 2026
- ELSA-2026-3189 Moderate: 389-ds-base security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Feb 24, 2026
References
- RHSA-2026:3189 vendor-advisory
- RHSA-2026:3208 vendor-advisory
- RHSA-2026:3379 vendor-advisory
- RHSA-2026:3504 vendor-advisory
- RHSA-2026:4207 vendor-advisory
- RHSA-2026:4661 vendor-advisory
- RHSA-2026:4720 vendor-advisory
- RHSA-2026:5196 vendor-advisory
- RHSA-2026:5511 vendor-advisory
- RHSA-2026:5512 vendor-advisory
- RHSA-2026:5513 vendor-advisory
- RHSA-2026:5514 vendor-advisory
- RHSA-2026:5568 vendor-advisory
- RHSA-2026:5569 vendor-advisory
- RHSA-2026:5576 vendor-advisory
- RHSA-2026:5597 vendor-advisory
- RHSA-2026:5598 vendor-advisory
- RHSA-2026:6220 vendor-advisory
- RHSA-2026:6268 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2025-14905 vdb-entry
- RHBZ#2423624 issue-tracking