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Vulnerability record · CVE-2026-11788 · published 9 June 2026

CVE-2026-11788: Redhat directory server null pointer dereference vulnerability

Redhat · Directory Server

A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the LDAP server when the system is under memory pressure.

7.5 CVSS 3.1 High EPSS 0.56% · top 55.5% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score
0.56%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
17References
18 Aug 2026Last modified by NVD

Description

A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the LDAP server when the system is under memory pressure.

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:55421
https://access.redhat.com/errata/RHSA-2026:55422
https://access.redhat.com/errata/RHSA-2026:55423
https://access.redhat.com/errata/RHSA-2026:55424
https://access.redhat.com/errata/RHSA-2026:55425
https://access.redhat.com/errata/RHSA-2026:55426
https://access.redhat.com/errata/RHSA-2026:55530
https://access.redhat.com/errata/RHSA-2026:55532
https://access.redhat.com/errata/RHSA-2026:55756
https://access.redhat.com/errata/RHSA-2026:55757
https://access.redhat.com/errata/RHSA-2026:55758
https://access.redhat.com/errata/RHSA-2026:55794
https://access.redhat.com/errata/RHSA-2026:56047
https://access.redhat.com/errata/RHSA-2026:56048
https://access.redhat.com/errata/RHSA-2026:56050
https://access.redhat.com/security/cve/CVE-2026-11788 Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2485423 Issue TrackingVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2026-11788), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.