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389-ds-base: 389-ds-base: unbounded LDAP controls count in get_ldapmessage_controls_ext() causes CPU and heap amplification (remote DoS)

🗓️ 17 Jun 2026 01:59:27Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 7 Views

Unbounded LDAP controls in 389-ds-base enable remote denial of service via high processor usage and memory exhaustion.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.6aarch64389-ds-base0:2.6.1-21.el9_6389-ds-base-0:2.6.1-21.el9_6.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64le389-ds-base0:2.6.1-21.el9_6389-ds-base-0:2.6.1-21.el9_6.ppc64le.rpm
Red Hat Enterprise Linux9.6s390x389-ds-base0:2.6.1-21.el9_6389-ds-base-0:2.6.1-21.el9_6.s390x.rpm
Red Hat Enterprise Linux9.6x86_64389-ds-base0:2.6.1-21.el9_6389-ds-base-0:2.6.1-21.el9_6.x86_64.rpm
Red Hat Enterprise Linux9.6aarch64389-ds-base-debuginfo0:2.6.1-21.el9_6389-ds-base-debuginfo-0:2.6.1-21.el9_6.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64le389-ds-base-debuginfo0:2.6.1-21.el9_6389-ds-base-debuginfo-0:2.6.1-21.el9_6.ppc64le.rpm
Red Hat Enterprise Linux9.6s390x389-ds-base-debuginfo0:2.6.1-21.el9_6389-ds-base-debuginfo-0:2.6.1-21.el9_6.s390x.rpm
Red Hat Enterprise Linux9.6x86_64389-ds-base-debuginfo0:2.6.1-21.el9_6389-ds-base-debuginfo-0:2.6.1-21.el9_6.x86_64.rpm
Red Hat Enterprise Linux9.6aarch64389-ds-base-debugsource0:2.6.1-21.el9_6389-ds-base-debugsource-0:2.6.1-21.el9_6.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64le389-ds-base-debugsource0:2.6.1-21.el9_6389-ds-base-debugsource-0:2.6.1-21.el9_6.ppc64le.rpm
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30 Jun 2026 10:14Current
5.2Medium risk
Vulners AI Score5.2
CVSS 3.17.5
EPSS0.00815
SSVC
7