CVE record · CVE-2026-9064

389-ds-base: 389-ds-base: unbounded ldap controls count in get_ldapmessage_controls_ext() causes cpu and heap amplification (remote dos)

CVSS 7.5 HighEPSS 0.0081 · 57th percentile

Published by the CVE Program (CNA: redhat) at 20 May 2026, 09:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Not given	Not given Package name: 389-ds-base https://github.com/389ds/389-ds-base	affected 0
Red Hat	Red Hat Directory Server 11.5 E4S for RHEL 8 Package name: redhat-ds:11 https://access.redhat.com/downloads/content/package-browser/	unaffected 8060020260609102432.0ca98e7e to before * rpm Other versions: affected
Red Hat	Red Hat Directory Server 11.7 E4S for RHEL 8 Package name: redhat-ds:11 https://access.redhat.com/downloads/content/package-browser/	unaffected 8080020260610130252.f969626e to before * rpm Other versions: affected
Red Hat	Red Hat Directory Server 11.9 for RHEL 8 Package name: redhat-ds:11 https://access.redhat.com/downloads/content/package-browser/	unaffected 8100020260601104139.37ed7c03 to before * rpm Other versions: affected
Red Hat	Red Hat Directory Server 12.2 E4S for RHEL 9 Package name: redhat-ds:12 https://access.redhat.com/downloads/content/package-browser/	unaffected 9020020260615123354.1674d574 to before * rpm Other versions: affected
Red Hat	Red Hat Directory Server 12.4 E4S for RHEL 9 Package name: redhat-ds:12 https://access.redhat.com/downloads/content/package-browser/	unaffected 9040020260611130021.1674d574 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 10 Package name: 389-ds-base https://access.redhat.com/downloads/content/package-browser/	unaffected 0:3.2.0-7.el10_2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 10.0 Extended Update Support Package name: 389-ds-base https://access.redhat.com/downloads/content/package-browser/	unaffected 0:3.0.6-18.el10_0 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support Package name: 389-ds-base https://access.redhat.com/downloads/content/package-browser/	unaffected 0:1.3.11.1-12.el7_9 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8 Package name: 389-ds:1.4 https://access.redhat.com/downloads/content/package-browser/	unaffected 8100020260601102239.25e700aa to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Package name: 389-ds:1.4 https://access.redhat.com/downloads/content/package-browser/	unaffected 8040020260609102422.96015a92 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Package name: 389-ds:1.4 https://access.redhat.com/downloads/content/package-browser/	unaffected 8040020260609102422.96015a92 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Package name: 389-ds:1.4 https://access.redhat.com/downloads/content/package-browser/	unaffected 8060020260609102416.824efc52 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Package name: 389-ds:1.4 https://access.redhat.com/downloads/content/package-browser/	unaffected 8060020260609102416.824efc52 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service Package name: 389-ds:1.4 https://access.redhat.com/downloads/content/package-browser/	unaffected 8080020260610125847.6dbb3803 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Package name: 389-ds:1.4 https://access.redhat.com/downloads/content/package-browser/	unaffected 8080020260610125847.6dbb3803 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9 Package name: 389-ds-base https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.8.0-7.el9_8 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Package name: 389-ds-base https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.2.4-18.el9_2 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Package name: 389-ds-base https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.4.5-25.el9_4 to before * rpm Other versions: affected
Red Hat	Red Hat Enterprise Linux 9.6 Extended Update Support Package name: 389-ds-base https://access.redhat.com/downloads/content/package-browser/	unaffected 0:2.6.1-21.el9_6 to before * rpm Other versions: affected
Red Hat	Red Hat Directory Server 13.2 Package name: dirsrv/dirsrv-container-rhel10 https://catalog.redhat.com/software/containers/	unaffected 1781714123 to before * rpm Other versions: affected
Red Hat	Red Hat Directory Server 12 Package name: redhat-ds:12/389-ds-base https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat Directory Server 13 Package name: 389-ds-base https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: affected
Red Hat	Red Hat Enterprise Linux 6 Package name: 389-ds-base https://access.redhat.com/downloads/content/package-browser/	No versions given Other versions: unknown

Identifiers: CVE-2026-9064
CNA: redhat
Weakness (CWE): CWE-770
Tags: Red Hat Directory Server 11.5 E4S for RHEL 8
Red Hat Directory Server 11.7 E4S for RHEL 8
Red Hat Directory Server 11.9 for RHEL 8
Red Hat Directory Server 12.2 E4S for RHEL 9
Red Hat Directory Server 12.4 E4S for RHEL 9
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 10.0 Extended Update Support
Red Hat Enterprise Linux 7 Extended Lifecycle Support
Denial of service
Published: 20 May 2026
Updated: 5 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (redhat)Used for this record
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	ADP (redhat-SADP)

CISA KEV Not listed.
EPSS 0.0081, the 57th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

20 May 2026, 09:00 UTC Confirmed by the CVE List
20 May 2026, 10:16 UTC Confirmed by NVD

Sources

References from the CNA

access.redhat.com/errata/RHSA-2026:26452 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26453 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26454 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26455 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26456 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26457 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26458 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26459 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26460 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26461 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26463 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26464 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26465 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26597 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26599 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:26639 vendor-advisoryredhat
access.redhat.com/errata/RHSA-2026:27125 vendor-advisoryredhat
access.redhat.com/security/cve/CVE-2026-9064 vdb-entryredhat
bugzilla.redhat.com/show_bug.cgi?id=2480093 issue-trackingredhat

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.