CVE-2026-11791

CVSS Score & Metrics

Base Score

5.0 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:H                                    

Vulnerability Description

A flaw was found in 389 Directory Server. During schema reload, the attr_syntax_swap_ht() function unconditionally frees attribute syntax information nodes, bypassing the refcount-based deferred deletion used elsewhere in the attribute syntax subsystem. If an administrator triggers schema reload while concurrent LDAP query traffic is active, worker threads may access freed memory, resulting in use-after-free or double-free and a denial of service (server crash).

Vulnerability Details

Published Date

June 18, 2026

Last Modified

June 18, 2026

CWE ID

CWE-416

Source

NVD

Vendor

Red Hat

Product

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

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

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