Resource exhaustion in Red Hat Directory Server 11
CVE-2026-11611
A flaw was found in 389 Directory Server. The Content Synchronization persistent search plugin allows unbounded memory growth when an authenticated client stops reading sync responses, enabling denial of service. Additional race conditions in plugin thread lifecycle can cause crashes during connection teardown or shutdown.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (14.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-11611 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking, Vendor Advisory)
- redhat.atlassian.net/browse/PSIRTSUPT-7600 (Permissions Required)
Frequently asked questions
- What is CVE-2026-11611?
- CVE-2026-11611 is a medium-severity vulnerability in Red Hat Directory Server 11, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-06-08.
- How severe is CVE-2026-11611?
- Medium severity. CVSS v3 base score is 6.5 out of 10.