PT-2026-48432 · Red Hat · Red Hat Directory Server 11+7

Published 2026-06-10 · Updated 2026-06-10 · CVE-2026-11884

Mitre

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

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.

Fix

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

CVE-2026-11884

Affected Products

Red Hat Directory Server 11

Red Hat Directory Server 12

Red Hat Directory Server 13

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 6

Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-11884 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2484913 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2423624 · Note
• https://access.redhat.com/security/cve/CVE-2026-11884 · Note
• https://redhat.atlassian.net/browse/PSIRTSUPT-7600 · Note