CVE-2026-16560— 389-ds-base: 389-ds-base: heap-buffer-overflow in rdn_av_swap on quoted multivalued rdn
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团队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存在权限许可和访问控制问题漏洞，该漏洞源于DNS包含遗留引用值时，服务器未关闭堆分配，导致另一个调用引用同一内存指针，造成拒绝服务或任意内存写入操作。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected 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 |
affected |
| 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-2026-16560
Vulnerability Information
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Vulnerability Title
389-ds-base: 389-ds-base: heap-buffer-overflow in rdn_av_swap on quoted multivalued rdn
Source: CVE Program / CVE List V5
Vulnerability Description
A heap-buffer-overflow flaw was found in Directory Server (389-ds-base). When a DN contains a legacy-quoted value, the server won't close the heap allocation allowing another call to refer to the same memory pointer causing a denial of service or an arbitrary memory write operation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1220
Source: CVE Program / CVE List V5
Vulnerability Title
389 Directory Server 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
389 Directory Server是389 Directory Server团队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存在权限许可和访问控制问题漏洞，该漏洞源于DNS包含遗留引用值时，服务器未关闭堆分配，导致另一个调用引用同一内存指针，造成拒绝服务或任意内存写入操作。
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-2026-16560
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-16560 (2)
Same Patch Batch · Red Hat · 2026-07-22 · 8 CVEs total
| CVE-2026-44189 | 7.8 HIGH | Ansible-lightspeed: visual studio code ansible lightspeed extension: arbitrary code execut |
| CVE-2026-44190 | 7.8 HIGH | Ansible-lightspeed: ansible lightspeed visual studio code extension: arbitrary code execut |
| CVE-2026-44191 | 7.8 HIGH | Ansible-lightspeed: visual studio code ansible lightspeed extension: remote code execution |
| CVE-2026-44192 | 6.6 MEDIUM | Ansible-lightspeed: ansible lightspeed mcp server: remote code execution and data exfiltra |
| CVE-2026-16544 | 6.5 MEDIUM | Awx: websocket eventconsumer missing authorization for inventory_update_events, project_up |
| CVE-2026-16473 | 4.3 MEDIUM | Sbc: sbc: heap out-of-bounds read via crafted sbc audio frame |
| CVE-2026-44187 | 3.3 LOW | Ansible-lightspeed: ansible lightspeed extension for visual studio code: information discl |
IV. Related Vulnerabilities
Same product: Red Hat Directory Server 11
-
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V. Comments for CVE-2026-16560
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