CVE-2026-9064A flaw was found in 389-ds-base.
Updated under an hour ago ()
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It affects redhat directory_server and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Aug 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
redhat directory_server redhat:directory_server | 11.0; 12.0; 13.0 | NVD |
redhat 389_directory_server redhat:389_directory_server | all versions | NVD |
redhat enterprise_linux redhat:enterprise_linux | 6.0; 7.0; 8.0; 9.0; 10.0 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:26452
- https://access.redhat.com/errata/RHSA-2026:26453
- https://access.redhat.com/errata/RHSA-2026:26454
- https://access.redhat.com/errata/RHSA-2026:26455
- https://access.redhat.com/errata/RHSA-2026:26456
- https://access.redhat.com/errata/RHSA-2026:26457
- https://access.redhat.com/errata/RHSA-2026:26458
- https://access.redhat.com/errata/RHSA-2026:26459
- https://access.redhat.com/errata/RHSA-2026:26460
- https://access.redhat.com/errata/RHSA-2026:26461
- https://access.redhat.com/errata/RHSA-2026:26463
- https://access.redhat.com/errata/RHSA-2026:26464
- https://access.redhat.com/errata/RHSA-2026:26465
- https://access.redhat.com/errata/RHSA-2026:26597
- https://access.redhat.com/errata/RHSA-2026:26599
- https://access.redhat.com/errata/RHSA-2026:26639
- https://access.redhat.com/errata/RHSA-2026:27125
- https://access.redhat.com/security/cve/CVE-2026-9064mitigation, vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2480093issue-tracking, vendor-advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9064.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.