CVE-2026-11611— 389-ds-base: 389-ds-base: content sync plugin unbounded queue growth and race conditions
Quick assessment
Affected
Red Hat Red Hat Directory Server 11
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
389 Directory Server是389 Directory Server开源的一个高度可用、功能齐全、可靠和安全的LDAP服务器实现。 389 Directory Server存在资源管理错误漏洞，该漏洞源于Content Synchronization持久搜索插件在认证客户端停止读取同步响应时允许无限制的内存增长，可能导致拒绝服务。此外，插件线程生命周期中的竞争条件可能在连接断开或关闭时导致崩溃。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Directory Server 11 | any |
affected |
| Red Hat | Red Hat Directory Server 12 | any |
affected |
| Red Hat | Red Hat Directory Server 13 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 10 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 6 | any |
unaffected |
| Red Hat | Red Hat Enterprise Linux 7 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 8 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 9 | any |
affected |
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I. Basic Information for CVE-2026-11611
Vulnerability Information
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Vulnerability Title
389-ds-base: 389-ds-base: content sync plugin unbounded queue growth and race conditions
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
389 Directory Server 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
389 Directory Server是389 Directory Server开源的一个高度可用、功能齐全、可靠和安全的LDAP服务器实现。 389 Directory Server存在资源管理错误漏洞，该漏洞源于Content Synchronization持久搜索插件在认证客户端停止读取同步响应时允许无限制的内存增长，可能导致拒绝服务。此外，插件线程生命周期中的竞争条件可能在连接断开或关闭时导致崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Directory Server 11 | - |
cpe:/a:redhat:directory_server:11
|
|
| Red Hat | Red Hat Directory Server 12 | - |
cpe:/a:redhat:directory_server:12
|
|
| Red Hat | Red Hat Directory Server 13 | - |
cpe:/a:redhat:directory_server:13
|
|
| Red Hat | Red Hat Enterprise Linux 10 | - |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 6 | - |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 | - |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 | - |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 | - |
cpe:/o:redhat:enterprise_linux:9
|
|
II. Public POCs for CVE-2026-11611
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-11611 (3)
Same Patch Batch · Red Hat · 2026-06-08 · 3 CVEs total
| CVE-2026-3238 | 7.5 HIGH | Samba: denial of service against ad dc wins server |
| CVE-2026-11569 | 5.4 MEDIUM | Quay: quay: stored xss via filedrop svg upload |
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V. Comments for CVE-2026-11611
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