What is CVE-2026-117548?

CVE-2026-117548 is a medium-severity vulnerability in Red Hat Directory Server 11, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-10-29.

How severe is CVE-2026-117548?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in Red Hat Directory Server 11

CVE-2026-117548

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.

Published 2026-10-29 · last modified 2026-10-29.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (26.8th percentile), scored 2026-10-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

access.redhat.com/security/cve/CVE-2026-117548 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)

Frequently asked questions

What is CVE-2026-117548?: CVE-2026-117548 is a medium-severity vulnerability in Red Hat Directory Server 11, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-10-29.
How severe is CVE-2026-117548?: Medium severity. CVSS v3 base score is 6.5 out of 10.