High severity7.5NVD Advisory· Published May 20, 2026· Updated Jun 2, 2026
CVE-2026-9064
CVE-2026-9064
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
28cpe:2.3:a:redhat:directory_server:11.0:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:a:redhat:directory_server:11.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:directory_server:12.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:directory_server:13.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:389_directory_server:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*+ 4 more
- cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- osv-coords18 versionspkg:rpm/almalinux/389-ds-basepkg:rpm/almalinux/389-ds-base-develpkg:rpm/almalinux/389-ds-base-legacy-toolspkg:rpm/almalinux/389-ds-base-libspkg:rpm/almalinux/389-ds-base-snmppkg:rpm/almalinux/python3-lib389pkg:rpm/opensuse/389-ds&distro=openSUSE%20Tumbleweedpkg:rpm/suse/389-ds&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/389-ds&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/389-ds&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/389-ds&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/389-ds&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP7pkg:rpm/suse/389-ds&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/389-ds&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/389-ds&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/389-ds&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/389-ds&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/389-ds&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6
< 2.8.0-7.el9_8+ 17 more
- (no CPE)range: < 2.8.0-7.el9_8
- (no CPE)range: < 2.8.0-7.el9_8
- (no CPE)range: < 1.4.3.39-24.module_el8.10.0+4196+be88fbc7
- (no CPE)range: < 2.8.0-7.el9_8
- (no CPE)range: < 2.8.0-7.el9_8
- (no CPE)range: < 2.8.0-7.el9_8
- (no CPE)range: < 3.1.4+e9d94d45a-1.1
- (no CPE)range: < 2.0.20~git90.9f70d434e-150400.3.51.1
- (no CPE)range: < 2.0.20~git90.9f70d434e-150400.3.51.1
- (no CPE)range: < 2.2.10~git229.1fa7ffdb4-150500.3.45.1
- (no CPE)range: < 2.2.10~git229.1fa7ffdb4-150500.3.45.1
- (no CPE)range: < 2.7.0~git193.9ab79d496-150700.3.16.1
- (no CPE)range: < 2.0.20~git90.9f70d434e-150400.3.51.1
- (no CPE)range: < 2.2.10~git229.1fa7ffdb4-150500.3.45.1
- (no CPE)range: < 2.2.10~git229.1fa7ffdb4-150600.8.29.1
- (no CPE)range: < 2.0.20~git90.9f70d434e-150400.3.51.1
- (no CPE)range: < 2.2.10~git229.1fa7ffdb4-150500.3.45.1
- (no CPE)range: < 2.2.10~git229.1fa7ffdb4-150600.8.29.1
Patches
Vulnerability mechanics
References
2- access.redhat.com/security/cve/CVE-2026-9064nvdMitigationVendor Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor Advisory
News mentions
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