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This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function in the LDAP server does not enforce an upper bound on the number of controls per LDAP message. A remote, unauthenticated attacker can send a specially crafted LDAP request containing hundreds of thousands of minimal controls within the default maximum BER message size (2 MB), causing excessive CPU consumption and heap allocation on the server. Under concurrent exploitation, this leads to significant latency degradation, worker thread starvation, or out-of-memory termination, resulting in a denial of service.
Metrics
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CVE Modified by Red Hat, Inc.6/17/2026 9:21:34 AM
Action
Type
Old Value
New Value
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26452
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26453
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26454
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26455
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26456
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26457
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26458
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26459
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26460
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26461
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26463
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26464
Added
Reference
https://access.redhat.com/errata/RHSA-2026:26465
Changed
Affected
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Initial Analysis by NIST6/02/2026 3:01:58 PM
Action
Type
Old Value
New Value
Added
CPE Configuration
OR
*cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:389_directory_server:-:*:*:*:*:*:*:*
*cpe:2.3:a:redhat:directory_server:11.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
*cpe:2.3:a:redhat:directory_server:12.0:*:*:*:*:*:*:*
*cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
*cpe:2.3:a:redhat:directory_server:13.0:*:*:*:*:*:*:*
Added
Reference Type
Red Hat, Inc.: https://access.redhat.com/security/cve/CVE-2026-9064 Types: Mitigation, Vendor Advisory
Added
Reference Type
Red Hat, Inc.: https://bugzilla.redhat.com/show_bug.cgi?id=2480093 Types: Issue Tracking, Vendor Advisory
New CVE Received from Red Hat, Inc.5/20/2026 6:16:28 AM
Action
Type
Old Value
New Value
Added
Description
A flaw was found in 389-ds-base. The get_ldapmessage_controls_ext() function in the LDAP server does not enforce an upper bound on the number of controls per LDAP message. A remote, unauthenticated attacker can send a specially crafted LDAP request containing hundreds of thousands of minimal controls within the default maximum BER message size (2 MB), causing excessive CPU consumption and heap allocation on the server. Under concurrent exploitation, this leads to significant latency degradation, worker thread starvation, or out-of-memory termination, resulting in a denial of service.
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