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.
References
| Link | Resource |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-9064 | Mitigation Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2480093 | Issue Tracking Vendor Advisory |
Configurations
Configuration 1 (hide)
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History
02 Jun 2026, 19:01
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Redhat
Redhat enterprise Linux Redhat 389 Directory Server Redhat directory Server |
|
| References | () https://access.redhat.com/security/cve/CVE-2026-9064 - Mitigation, Vendor Advisory | |
| References | () https://bugzilla.redhat.com/show_bug.cgi?id=2480093 - Issue Tracking, Vendor Advisory | |
| CPE | cpe:2.3:a:redhat:directory_server:12.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* cpe:2.3:a:redhat:directory_server:11.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* cpe:2.3:a:redhat:directory_server:13.0:*:*:*:*:*:*:* cpe:2.3:o:redhat:389_directory_server:-:*:*:*:*:*:*:* cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
20 May 2026, 10:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-20 10:16
Updated : 2026-06-02 19:01
NVD link : CVE-2026-9064
Mitre link : CVE-2026-9064
CVE.ORG link : CVE-2026-9064
JSON object : View
Products Affected
redhat
- directory_server
- 389_directory_server
- enterprise_linux
CWE
CWE-770
Allocation of Resources Without Limits or Throttling