Description
A stack buffer overflow flaw was found in 389 Directory Server (389-ds-base). The get_ruvelement_from_berval() function in repl5_ruv.c copies digit characters from a network-supplied RUV berval into a fixed 16-byte stack buffer without bounds checking. A remote unauthenticated attacker can crash the LDAP server by sending a crafted StartNSDS50ReplicationRequest extended operation containing a replica ID field with more than 16 digit characters. The overflow occurs during payload decoding, before any authorization check. Stack protectors limit impact to denial of service.
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 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 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 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 | 3.2.0-9.el10_2 | RHSA-2026:55424 |
| RHEL 9 | 389-ds-base +4 | 2.8.0-9.el9_8 | RHSA-2026:55423 |
| RHEL 8 | 389-ds-base +5 | 1.4.3.39-26.module+el8.10.0+24634+ded7774b | RHSA-2026:55530 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | 389-ds-base +5 | 3.0.6-20.el10_0 | RHSA-2026:55425 |
| RHEL 9.6 EUS | 389-ds-base +4 | 2.6.1-23.el9_6 | RHSA-2026:55426 |
| RHEL 9.4 E4S | 389-ds-base +2 | 2.4.5-27.el9_4 | RHSA-2026:55422 |
| RHEL 9.2 E4S | 389-ds-base +2 | 2.2.4-20.el9_2 | RHSA-2026:55421 |
| RHEL 8.8 TUS | 389-ds-base +5 | 1.4.3.35-20.module+el8.8.0+24646+9b151ec7 | RHSA-2026:55794 |
| RHEL 8.8 E4S | 389-ds-base +5 | 1.4.3.35-20.module+el8.8.0+24646+9b151ec7 | RHSA-2026:55794 |
| RHEL 8.6 EUS Long Life | 389-ds-base +5 | 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8 | RHSA-2026:55756 |
| RHEL 8.6 AUS | 389-ds-base +5 | 1.4.3.34-11.module+el8.6.0+24647+ee33cdf8 | RHSA-2026:55756 |
| RHEL 8.4 EUS Long Life | 389-ds-base +5 | 1.4.3.34-6.module+el8.4.0+24619+217e1084 | RHSA-2026:55757 |
| RHEL 8.4 AUS | 389-ds-base +5 | 1.4.3.34-6.module+el8.4.0+24619+217e1084 | RHSA-2026:55757 |
| RHEL 7 ELS | 389-ds-base +3 | 1.3.11.1-14.el7_9 | RHSA-2026:55758 |
| Red Hat Directory Server E4s 12 | 389-ds-base +5 | 2.2.7-17.module+el9dsrv+24586+9fc9d4dc | RHSA-2026:56050, RHSA-2026:56048 |
| Red Hat Directory Server E4s 11 | 389-ds-base +6 | 1.4.3.34-9.module+el8dsrv+24847+c94540a6 | RHSA-2026:79217, RHSA-2026:56047 |
| Red Hat Directory Server 11 | 389-ds-base +6 | 1.4.3.39-26.module+el8dsrv+24624+a4839c0f | RHSA-2026:55532 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | 389-ds-base +5 | 3.2.0-9.el10_2 | ALSA-2026:55424 |
| AlmaLinux 9 | 389-ds-base +4 | 2.8.0-9.el9_8 | ALSA-2026:55423 |
| AlmaLinux 8 | 389-ds-base +5 | 1.4.3.39-26.module_el8.10.0+4254+e9c4b400 | ALSA-2026:55530 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | 389-ds-base | 3.2.0-9.el10_2 | RLSA-2026:55424 |
| Rocky Linux 9 | 389-ds-base | 2.8.0-9.el9_8 | RLSA-2026:55423 |
| Rocky Linux 8 | 389-ds-base | 1.4.3.39-26.module+el8.10.0+40279+2d6f642b | RLSA-2026:55530 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | 389-ds | 3.3.1+8c2711bd6-1.1 | openSUSE-SU-2026:11739-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | 389-ds-base +3 | 1.3.10.2-17.amzn2.0.11 | ALAS2-2026-3926 |
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 | 3.2.0-9.el10_2 | ELSA-2026-55424 |
| Oracle Linux 9 | 389-ds-base +4 | 2.8.0-9.el9_8 | ELSA-2026-55423 |
| Oracle Linux 8 | 389-ds-base +5 | 1.4.3.39-26.module+el8.10.0+90990+5ec542c6 | ELSA-2026-55530 |
| Oracle Linux 7 | 389-ds-base +3 | 1.3.11.1-5.0.13.el7_9 | ELSA-2026-55758 |
Advisories 29
- WID-SEC-2026-2854 Red Hat Enterprise Linux (389-ds-base): Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 29, 2026
- ALSA-2026:55423 Important: 389-ds-base security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:55424 Important: 389-ds-base security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:55530 Important: 389-ds:1.4 security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:79217 Red Hat Security Advisory: redhat-ds:11 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 19, 2026
- RHSA-2026:56050 Red Hat Security Advisory: redhat-ds:12 security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:56047 Red Hat Security Advisory: redhat-ds:11 security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:56048 Red Hat Security Advisory: redhat-ds:12 security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:55794 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:55757 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:55758 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:55756 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:55530 Red Hat Security Advisory: 389-ds:1.4 security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:55532 Red Hat Security Advisory: redhat-ds:11 security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:55426 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:55424 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:55425 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:55422 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:55423 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- RHSA-2026:55421 Red Hat Security Advisory: 389-ds-base security update Red Hat Security Advisories (RHSA) · Oct 10, 2026
- ALAS2-2026-3926 Important: 389-ds-base security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Sep 28, 2026
- ELSA-2026-55758 Important: 389-ds-base security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 21, 2026
- openSUSE-SU-2026:11739-1 389-ds-3.3.1+8c2711bd6-1.1 on GA media SUSE / openSUSE Security Updates · Sep 11, 2026
- RLSA-2026:55530 Important: 389-ds:1.4 security update Rocky Linux Security Advisories · Aug 17, 2026
- RLSA-2026:55423 Important: 389-ds-base security update Rocky Linux Security Advisories · Aug 17, 2026
- RLSA-2026:55424 Important: 389-ds-base security update Rocky Linux Security Advisories · Aug 17, 2026
- ELSA-2026-55424 Important: 389-ds-base security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Aug 17, 2026
- ELSA-2026-55423 Important: 389-ds-base security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 17, 2026
- ELSA-2026-55530 Important: 389-ds:1.4 security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 17, 2026
References
- RHSA-2026:55421 vendor-advisory
- RHSA-2026:55422 vendor-advisory
- RHSA-2026:55423 vendor-advisory
- RHSA-2026:55424 vendor-advisory
- RHSA-2026:55425 vendor-advisory
- RHSA-2026:55426 vendor-advisory
- RHSA-2026:55530 vendor-advisory
- RHSA-2026:55532 vendor-advisory
- RHSA-2026:55756 vendor-advisory
- RHSA-2026:55757 vendor-advisory
- RHSA-2026:55758 vendor-advisory
- RHSA-2026:55794 vendor-advisory
- RHSA-2026:56047 vendor-advisory
- RHSA-2026:56048 vendor-advisory
- RHSA-2026:56050 vendor-advisory
- RHSA-2026:79217 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-15722 vdb-entry
- RHBZ#2499961 issue-tracking