Red Hat Security Advisory: 389-ds-base security update
389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration. Security Fix(es): * 389-ds-base: 389-ds-base: unbounded LDAP controls count in get_ldapmessage_controls_ext() causes CPU and heap amplification (remote DoS) (CVE-2026-9064) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
The vulnerability CVE-2026-9064 in 389-ds-base is caused by an unbounded count of LDAP controls in the get_ldapmessage_controls_ext() function. This flaw can be exploited remotely to cause CPU and heap resource amplification, resulting in a denial of service condition. Red Hat has released an update for Red Hat Enterprise Linux 9 and related distributions to fix this issue. The advisory also includes various bug fixes and enhancements unrelated to the security vulnerability. The update is classified as important by Red Hat Product Security. No detailed CVSS score is provided in the advisory. The vulnerability is tracked under CWE-770 (Allocation of Resources Without Limits or Throttling).
Potential Impact
Successful exploitation of this vulnerability can lead to a remote denial of service by causing excessive CPU and heap memory consumption on the affected server. This can disrupt LDAP services provided by the 389 Directory Server, potentially impacting authentication and directory services relying on it. No evidence of exploitation in the wild has been reported at this time.
Mitigation Recommendations
Red Hat has released an official update that addresses this vulnerability. Users should apply the updated 389-ds-base packages as provided in Red Hat Enterprise Linux 9. Detailed instructions and package downloads are available in the Red Hat advisory RHSA-2026:26455 at https://access.redhat.com/errata/RHSA-2026:26455. Applying this update will mitigate the vulnerability. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: 389-ds-base security update
Description
389 Directory Server is an LDAP version 3 (LDAPv3) compliant server. The base packages include the Lightweight Directory Access Protocol (LDAP) server and command-line utilities for server administration. Security Fix(es): * 389-ds-base: 389-ds-base: unbounded LDAP controls count in get_ldapmessage_controls_ext() causes CPU and heap amplification (remote DoS) (CVE-2026-9064) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
CVSS v3.1
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-9064 in 389-ds-base is caused by an unbounded count of LDAP controls in the get_ldapmessage_controls_ext() function. This flaw can be exploited remotely to cause CPU and heap resource amplification, resulting in a denial of service condition. Red Hat has released an update for Red Hat Enterprise Linux 9 and related distributions to fix this issue. The advisory also includes various bug fixes and enhancements unrelated to the security vulnerability. The update is classified as important by Red Hat Product Security. No detailed CVSS score is provided in the advisory. The vulnerability is tracked under CWE-770 (Allocation of Resources Without Limits or Throttling).
Potential Impact
Successful exploitation of this vulnerability can lead to a remote denial of service by causing excessive CPU and heap memory consumption on the affected server. This can disrupt LDAP services provided by the 389 Directory Server, potentially impacting authentication and directory services relying on it. No evidence of exploitation in the wild has been reported at this time.
Mitigation Recommendations
Red Hat has released an official update that addresses this vulnerability. Users should apply the updated 389-ds-base packages as provided in Red Hat Enterprise Linux 9. Detailed instructions and package downloads are available in the Red Hat advisory RHSA-2026:26455 at https://access.redhat.com/errata/RHSA-2026:26455. Applying this update will mitigate the vulnerability. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:26455
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a3270570b89be68881d3b05
Added to database: 6/17/2026, 10:00:55 AM
Last enriched: 6/17/2026, 10:03:05 AM
Last updated: 6/17/2026, 5:24:56 PM
Views: 4
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