Vulnerability · Published Oct 29, 2026 · Assigned by redhat
CVE-2026-117548389-ds-base: 389-ds-base: null pointer dereference via modifydn using an attribute's schema alias name causes denial of service
Medium 6.5
In plain English
A medium-severity null pointer dereference in Red Hat Directory Server 11 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).
Official description
A NULL pointer dereference flaw was found in 389-ds-base. This flaw occurs when a ModifyDN (rename) operation uses an attribute's schema alias name (such as "commonName") instead of its canonical name (such as "cn") as the new relative distinguished name. An authenticated attacker with the ModifyDN (rename) permission on the affected entry can use this flaw to crash the directory server, causing a denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | 389-ds-base | no fix listed | DEBIAN-CVE-2026-117548 |
| Debian:13 | 389-ds-base | no fix listed | DEBIAN-CVE-2026-117548 |
| Ubuntu:22.04:LTS | 389-ds-base | no fix listed | UBUNTU-CVE-2026-117548 |
| Ubuntu:24.04:LTS | 389-ds-base | no fix listed | UBUNTU-CVE-2026-117548 |
| Ubuntu:26.04:LTS | 389-ds-base | no fix listed | UBUNTU-CVE-2026-117548 |
| Ubuntu:26.10 | 389-ds-base | no fix listed | UBUNTU-CVE-2026-117548 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Directory Server 11 | see references |
| Red Hat | Red Hat Directory Server 12 | see references |
| Red Hat | Red Hat Directory Server 13 | see references |
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- https://access.redhat.com/security/cve/CVE-2026-117548 vdb-entry, x_refsource_REDHAT
- RHBZ#2561778 issue-tracking, x_refsource_REDHAT