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  4. CVE 2026 11611 389 ds base 389 ds base content sync plugin
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Back to active CVEs
Medium · CVSS 6.5CVE-2026-11611

389-ds-base: 389-ds-base: content sync plugin unbounded queue growth and race conditionsCVE-2026-11611

Answer in brief

CVE-2026-11611 records a Medium severity (CVSS 6.5) vulnerability in 389-ds-base: 389-ds-base: content sync plugin unbounded queue growth and race conditions. The current sources do not mark it as known exploited. The current feed maps Red Hat/389-ds-base (generic), Red Hat/redhat-ds:11/389-ds-base (generic), Red Hat/redhat-ds:12/389-ds-base (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jun 8, 2026Updated Jun 30, 2026Source checked Nov 4, 2026First seen by HOL Jun 30, 2026Material review Jun 30, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/389-ds-base (generic), Red Hat/redhat-ds:11/389-ds-base (generic), Red Hat/redhat-ds:12/389-ds-base (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/389-ds-basegeneric*Not reported
Red Hat/redhat-ds:11/389-ds-basegeneric*Not reported
Red Hat/redhat-ds:12/389-ds-basegeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/389-ds-base, Red Hat/redhat-ds:11/389-ds-base, Red Hat/redhat-ds:12/389-ds-base.
  2. 2Review the reported fix. Source-reported workaround: Bug 1 (Queue DoS): Reduce SYNC_MAX_CONCURRENT from the default of 10 to minimize the number of clients that can accumulate queues. Apply network-level rate limiting on persistent sync search requests. Monitor client connections and terminate stalled sync clients that stop reading for an extended period. Set system-level memory limits (e.g., LimitAS= in the systemd unit file or cgroup memory limits) to prevent unbounded memory growth. Bugs 2 and 3: No workaround available — these are code-level race conditions that require source fixes.

Evidence timeline and material changes

  1. Published upstream

    Jun 8, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Jun 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jun 30, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Pre-authentication upload parsing permits resource exhaustionAlso CWE-400

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-400
Source
CVE List V5
Source checked
Nov 4, 2026
References
2 linked sources
Open source record