Description
A heap buffer overflow flaw was found in 389 Directory Server. When serializing objectclass definitions, the oc_superior (SUP) field length is omitted from buffer size calculations in read_schema_dse() and schema_oc_to_string(), but the field is still written via strcat(). An attacker with Directory Manager privileges, or a compromised replication supplier, can trigger a server crash by creating objectclasses with long SUP values. This is an incomplete fix variant of CVE-2025-14905.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| 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 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | 389-ds | 2.7.0~git212.9b0755edb-150700.3.19.1 | SUSE-SU-2026:3138-1 |
| SLES 15 SP6 | 389-ds | 2.2.10~git255.752643c78-150600.8.32.1 | SUSE-SU-2026:3136-1 |
| SLES 15 SP5 | 389-ds | 2.2.10~git255.752643c78-150500.3.48.1 | SUSE-SU-2026:3137-1 |
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~git382.7a51ea5f5-160000.1.1 | SUSE-SU-2026:23574-1 |
| SLES for SAP 15 SP6 | 389-ds | 2.2.10~git255.752643c78-150600.8.32.1 | SUSE-SU-2026:3136-1 |
| SLES for SAP 15 SP5 | 389-ds | 2.2.10~git255.752643c78-150500.3.48.1 | SUSE-SU-2026:3137-1 |
| SLES 16.0 | 389-ds | 3.0.6~git382.7a51ea5f5-160000.1.1 | SUSE-SU-2026:23574-1 |
| SLE HPC 15 SP5 | 389-ds | 2.2.10~git255.752643c78-150500.3.48.1 | SUSE-SU-2026:3137-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | 389-ds | 3.2.2+4b41542b2-1.1 | openSUSE-SU-2026:11600-1 |
| openSUSE Leap 16.0 | 389-ds | 3.0.6~git382.7a51ea5f5-160000.1.1 | openSUSE-SU-2026:21691-1 |
Advisories 6
- SUSE-SU-2026:23574-1 Security update for 389-ds SUSE / openSUSE Security Updates · Sep 29, 2026
- openSUSE-SU-2026:21691-1 Security update for 389-ds SUSE / openSUSE Security Updates · Aug 31, 2026
- openSUSE-SU-2026:11600-1 389-ds-3.2.2+4b41542b2-1.1 on GA media SUSE / openSUSE Security Updates · Aug 27, 2026
- SUSE-SU-2026:3138-1 Security update for 389-ds SUSE / openSUSE Security Updates · Jul 21, 2026
- SUSE-SU-2026:3136-1 Security update for 389-ds SUSE / openSUSE Security Updates · Jul 21, 2026
- SUSE-SU-2026:3137-1 Security update for 389-ds SUSE / openSUSE Security Updates · Jul 21, 2026