Bug 2485423 (CVE-2026-11788)

Summary:	CVE-2026-11788 389-ds-base: 389-ds-base: NULL pointer dereference in deref control plugin BER parser
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aadhikar, bsmejkal, jachapma, mreynolds, progier, rhel-process-autobot, snegrini, spichugi, tbordaz, vashirov, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	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.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2495003
Bug Blocks:

Description OSIDB Bzimport 2026-06-05 12:25:05 UTC

The dereference control plugin in 389 Directory Server fails to check the return value of ber_init() for NULL before use in deref_parse_ctrl_value() (deref.c). When memory allocation fails under memory pressure, an unauthenticated LDAP client sending a search with the deref control can crash ns-slapd.

The deref plugin is enabled by default. Crash confirmed via GDB fault injection on Fedora 42 (SIGABRT) and CentOS 7 (SIGSEGV on OpenLDAP 2.4). Vulnerable code present since deref plugin introduction in 389-ds-base 1.2.6 (~2010).

Comment 1 errata-xmlrpc 2026-08-17 01:20:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:55421 https://access.redhat.com/errata/RHSA-2026:55421

Comment 2 errata-xmlrpc 2026-08-17 01:23:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:55425 https://access.redhat.com/errata/RHSA-2026:55425

Comment 3 errata-xmlrpc 2026-08-17 01:33:31 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:55422 https://access.redhat.com/errata/RHSA-2026:55422

Comment 4 errata-xmlrpc 2026-08-17 01:37:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:55426 https://access.redhat.com/errata/RHSA-2026:55426

Comment 5 errata-xmlrpc 2026-08-17 02:05:44 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:55424 https://access.redhat.com/errata/RHSA-2026:55424

Comment 6 errata-xmlrpc 2026-08-17 02:23:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:55423 https://access.redhat.com/errata/RHSA-2026:55423

Comment 7 errata-xmlrpc 2026-08-17 08:51:49 UTC

This issue has been addressed in the following products:

  Red Hat Directory Server 11.9 for RHEL 8

Via RHSA-2026:55532 https://access.redhat.com/errata/RHSA-2026:55532

Comment 8 errata-xmlrpc 2026-08-17 09:16:12 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:55530 https://access.redhat.com/errata/RHSA-2026:55530

Comment 10 errata-xmlrpc 2026-08-17 15:39:26 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:55757 https://access.redhat.com/errata/RHSA-2026:55757

Comment 11 errata-xmlrpc 2026-08-17 15:44:47 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:55756 https://access.redhat.com/errata/RHSA-2026:55756

Comment 12 errata-xmlrpc 2026-08-17 15:54:14 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:55758 https://access.redhat.com/errata/RHSA-2026:55758

Comment 13 errata-xmlrpc 2026-08-17 17:16:57 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:55794 https://access.redhat.com/errata/RHSA-2026:55794

Comment 14 errata-xmlrpc 2026-08-18 09:40:23 UTC

This issue has been addressed in the following products:

  Red Hat Directory Server 11.7 E4S for RHEL 8

Via RHSA-2026:56047 https://access.redhat.com/errata/RHSA-2026:56047

Comment 15 errata-xmlrpc 2026-08-18 09:40:28 UTC

This issue has been addressed in the following products:

  Red Hat Directory Server 12.2 E4S for RHEL 9

Via RHSA-2026:56048 https://access.redhat.com/errata/RHSA-2026:56048

Comment 16 errata-xmlrpc 2026-08-18 09:41:01 UTC

This issue has been addressed in the following products:

  Red Hat Directory Server 12.4 E4S for RHEL 9

Via RHSA-2026:56050 https://access.redhat.com/errata/RHSA-2026:56050