Description
A flaw was found in 389-ds-base. A remote, authenticated attacker could exploit a vulnerability in the Simple Authentication and Security Layer (SASL) UNBIND process. By sending a specially crafted request, the attacker can cause a connection to stall, leading to resource exhaustion and a Denial of Service (DoS) for the server.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Directory Server 13.2 | — | — |
| Red Hat | Red Hat Directory Server 11 | — | — |
| Red Hat | Red Hat Directory Server 12 | — | — |
| Red Hat | Red Hat Directory Server 13 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
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.
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 | 3.2.0-10.el10_2 | RHSA-2026:64785 |
| RHEL 9 | 389-ds-base +4 | 2.8.0-10.el9_8 | RHSA-2026:64784 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | 389-ds-base +5 | 3.2.0-10.el10_2 | ALSA-2026:64785 |
| AlmaLinux 9 | 389-ds-base +4 | 2.8.0-10.el9_8 | ALSA-2026:64784 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | 389-ds-base | 3.2.0-10.el10_2 | RLSA-2026:64785 |
| Rocky Linux 9 | 389-ds-base | 2.8.0-10.el9_8 | RLSA-2026:64784 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | 389-ds-base | No fix yet | — |
Advisories 6
- ALSA-2026:64784 Critical: 389-ds-base security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:64785 Critical: 389-ds-base security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:64785 Red Hat Security Advisory: 389-ds-base security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 19, 2026
- RHSA-2026:64784 Red Hat Security Advisory: 389-ds-base security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 19, 2026
- RLSA-2026:64784 Critical: 389-ds-base security, bug fix, and enhancement update Rocky Linux Security Advisories · Sep 9, 2026
- RLSA-2026:64785 Critical: 389-ds-base security, bug fix, and enhancement update Rocky Linux Security Advisories · Sep 9, 2026
References
- RHSA-2026:64784 vendor-advisory
- RHSA-2026:64785 vendor-advisory
- RHSA-2026:65119 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-78701 vdb-entry
- RHBZ#2523232 issue-tracking