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Vulnerability · Published Jun 9, 2026 · Assigned by redhat

CVE-2026-11788389-ds-base: 389-ds-base: null pointer dereference in deref control plugin ber parser

Medium 5.9

In plain English

A medium-severity null pointer dereference in Red Hat Directory Server 11.5 E4S for RHEL 8 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 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.6%top 53.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10389-ds-base3.2.0-9.el10_2ALSA-2026:55424
AlmaLinux:8389-ds-base1.4.3.39-26.module_el8.10.0+4254+e9c4b400ALSA-2026:55530
AlmaLinux:9389-ds-base2.8.0-9.el9_8ALSA-2026:55423
AlmaLinux:10389-ds-base-bdb3.2.0-9.el10_2ALSA-2026:55424
AlmaLinux:10389-ds-base-devel3.2.0-9.el10_2ALSA-2026:55424
AlmaLinux:8389-ds-base-devel1.4.3.39-26.module_el8.10.0+4254+e9c4b400ALSA-2026:55530
AlmaLinux:9389-ds-base-devel2.8.0-9.el9_8ALSA-2026:55423
AlmaLinux:8389-ds-base-legacy-tools1.4.3.39-26.module_el8.10.0+4254+e9c4b400ALSA-2026:55530
AlmaLinux:10389-ds-base-libs3.2.0-9.el10_2ALSA-2026:55424
AlmaLinux:8389-ds-base-libs1.4.3.39-26.module_el8.10.0+4254+e9c4b400ALSA-2026:55530
AlmaLinux:9389-ds-base-libs2.8.0-9.el9_8ALSA-2026:55423
AlmaLinux:10389-ds-base-snmp3.2.0-9.el10_2ALSA-2026:55424
AlmaLinux:8389-ds-base-snmp1.4.3.39-26.module_el8.10.0+4254+e9c4b400ALSA-2026:55530
AlmaLinux:9389-ds-base-snmp2.8.0-9.el9_8ALSA-2026:55423
AlmaLinux:10python3-lib3893.2.0-9.el10_2ALSA-2026:55424
AlmaLinux:8python3-lib3891.4.3.39-26.module_el8.10.0+4254+e9c4b400ALSA-2026:55530
AlmaLinux:9python3-lib3892.8.0-9.el9_8ALSA-2026:55423
Debian:12389-ds-baseno fix listedDEBIAN-CVE-2026-11788
Debian:13389-ds-baseno fix listedDEBIAN-CVE-2026-11788
Rocky Linux:10389-ds-base0:3.2.0-9.el10_2RLSA-2026:55424
Rocky Linux:8389-ds-base0:1.4.3.39-26.module+el8.10.0+40279+2d6f642bRLSA-2026:55530
Rocky Linux:9389-ds-base0:2.8.0-9.el9_8RLSA-2026:55423
Ubuntu:22.04:LTS389-ds-baseno fix listedUBUNTU-CVE-2026-11788
Ubuntu:24.04:LTS389-ds-baseno fix listedUBUNTU-CVE-2026-11788
Ubuntu:25.10389-ds-baseno fix listedUBUNTU-CVE-2026-11788
Ubuntu:26.04:LTS389-ds-baseno fix listedUBUNTU-CVE-2026-11788
Ubuntu:26.10389-ds-baseno fix listedUBUNTU-CVE-2026-11788

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Directory Server 11.5 E4S for RHEL 8 see references
Red Hat Red Hat Directory Server 11.7 E4S for RHEL 8 see references
Red Hat Red Hat Directory Server 11.9 for RHEL 8 see references
Red Hat Red Hat Directory Server 12.2 E4S for RHEL 9 see references
Red Hat Red Hat Directory Server 12.4 E4S for RHEL 9 see references
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 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 6 see references

Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

References