Red Hat Security Advisory: redhat-ds:12 security update
A security vulnerability (CVE-2026-9064) exists in Red Hat Directory Server 12.2 E4S for RHEL 9 where an unbounded LDAP controls count in the function get_ldapmessage_controls_ext() can cause CPU and heap amplification, leading to a remote denial of service (DoS). Red Hat has issued an important security update to address this issue in the 389-ds-base package.
AI Analysis
Technical Summary
Red Hat Directory Server, an LDAPv3-compliant directory server, contains a vulnerability identified as CVE-2026-9064 in the 389-ds-base component. The issue arises from an unbounded count of LDAP controls in the get_ldapmessage_controls_ext() function, which can be exploited to cause CPU and heap resource amplification, resulting in a remote denial of service condition. Red Hat has released a security update for Red Hat Directory Server 12.2 E4S on RHEL 9.2 to fix this vulnerability. The advisory is classified as important by Red Hat Product Security.
Potential Impact
Exploitation of this vulnerability allows an attacker to cause a denial of service by exhausting CPU and heap resources remotely, potentially disrupting directory server availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released an official security update for Red Hat Directory Server 12.2 E4S on RHEL 9.2 that addresses this vulnerability. Users should apply the update as described in the Red Hat advisory RHSA-2026:26639 and the referenced article https://access.redhat.com/articles/11258 to remediate the issue. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: redhat-ds:12 security update
Description
A security vulnerability (CVE-2026-9064) exists in Red Hat Directory Server 12.2 E4S for RHEL 9 where an unbounded LDAP controls count in the function get_ldapmessage_controls_ext() can cause CPU and heap amplification, leading to a remote denial of service (DoS). Red Hat has issued an important security update to address this issue in the 389-ds-base package.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat Directory Server, an LDAPv3-compliant directory server, contains a vulnerability identified as CVE-2026-9064 in the 389-ds-base component. The issue arises from an unbounded count of LDAP controls in the get_ldapmessage_controls_ext() function, which can be exploited to cause CPU and heap resource amplification, resulting in a remote denial of service condition. Red Hat has released a security update for Red Hat Directory Server 12.2 E4S on RHEL 9.2 to fix this vulnerability. The advisory is classified as important by Red Hat Product Security.
Potential Impact
Exploitation of this vulnerability allows an attacker to cause a denial of service by exhausting CPU and heap resources remotely, potentially disrupting directory server availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released an official security update for Red Hat Directory Server 12.2 E4S on RHEL 9.2 that addresses this vulnerability. Users should apply the update as described in the Red Hat advisory RHSA-2026:26639 and the referenced article https://access.redhat.com/articles/11258 to remediate the issue. 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-2026:26639
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
Threat ID: 6a380732eed863c81e00a295
Added to database: 06/21/2026, 15:45:54 UTC
Last enriched: 06/21/2026, 16:06:07 UTC
Last updated: 06/22/2026, 02:09:13 UTC
Views: 8
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