CVE-2026-11610— 389-ds-base: 389-ds-base: heap buffer overflow in sasl_io_recv() via padded sasl unbind
Quick assessment
Affected
389ds 389-ds-base
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存在缓冲区错误漏洞，该漏洞源于SASL I/O层的sasl_io_recv()函数中缺少边界检查，导致经过身份验证的攻击者可以发送特制的大型LDAP UNBIND数据包，复制到512字节的堆接收缓冲区时发生堆缓冲区溢出，允许约2兆字节的攻击者控制数据溢出缓冲区，造成拒绝服务（服务器崩溃）。以下版本受到影响：Red Ha
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 24
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I. Basic Information for CVE-2026-11610
Vulnerability Information
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Vulnerability Title
389-ds-base: 389-ds-base: heap buffer overflow in sasl_io_recv() via padded sasl unbind
Source: CVE Program / CVE List V5
Vulnerability Description
A heap buffer overflow flaw was found in the SASL I/O layer of 389 Directory Server
(389-ds-base). After a successful SASL bind with integrity protection (SSF > 0),
an authenticated attacker can send a specially crafted oversized LDAP UNBIND packet
that is copied into a 512-byte heap receive buffer without a bounds check in
sasl_io_recv() in sasl_io.c. This allows up to approximately 2 megabytes of
attacker-controlled data to overflow the buffer, causing a denial of service (server
crash). In FreeIPA and Red Hat Identity Management deployments, any domain user with
a valid Kerberos ticket, any enrolled host, or any service account can trigger this
vulnerability over the network after authenticating via GSSAPI.
The vulnerable code path has existed since approximately 2013 (389-ds-base 1.3.2) and
was not addressed by the CVE-2025-14905 fix, which patched a separate heap overflow
in schema.c only.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
389 Directory Server 缓冲区错误漏洞
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存在缓冲区错误漏洞，该漏洞源于SASL I/O层的sasl_io_recv()函数中缺少边界检查，导致经过身份验证的攻击者可以发送特制的大型LDAP UNBIND数据包，复制到512字节的堆接收缓冲区时发生堆缓冲区溢出，允许约2兆字节的攻击者控制数据溢出缓冲区，造成拒绝服务（服务器崩溃）。以下版本受到影响：Red Ha
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 |
|---|---|---|---|---|
| 389ds | 389-ds-base | 1.3.2 ~ 3.3.0 | - |
|
| Red Hat | Red Hat Directory Server 11.5 E4S for RHEL 8 | 8060020260702180044.0ca98e7e ~ * |
cpe:/a:redhat:directory_server_e4s:11.5::el8
|
|
| Red Hat | Red Hat Directory Server 11.7 E4S for RHEL 8 | 8080020260702180836.f969626e ~ * |
cpe:/a:redhat:directory_server_e4s:11.7::el8
|
|
| Red Hat | Red Hat Directory Server 11.9 for RHEL 8 | 8100020260702145313.37ed7c03 ~ * |
cpe:/a:redhat:directory_server:11.9::el8
|
|
| Red Hat | Red Hat Directory Server 12.2 E4S for RHEL 9 | 9020020260703060155.1674d574 ~ * |
cpe:/a:redhat:directory_server_e4s:12.2::el9
|
|
| Red Hat | Red Hat Directory Server 12.4 E4S for RHEL 9 | 9040020260703055735.1674d574 ~ * |
cpe:/a:redhat:directory_server_e4s:12.4::el9
|
|
| Red Hat | Red Hat Enterprise Linux 10 | 0:3.2.0-8.el10_2 ~ * |
cpe:/o:redhat:enterprise_linux:10.2
|
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:3.0.6-19.el10_0 ~ * |
cpe:/o:redhat:enterprise_linux_eus:10.0
|
|
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | 0:1.3.11.1-13.el7_9 ~ * |
cpe:/o:redhat:rhel_els:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 | 8100020260626120929.25e700aa ~ * |
cpe:/a:redhat:enterprise_linux:8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | 8040020260629123121.96015a92 ~ * |
cpe:/a:redhat:rhel_aus:8.4::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | 8040020260629123121.96015a92 ~ * |
cpe:/a:redhat:rhel_aus:8.4::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 8060020260626130540.824efc52 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | 8060020260626130540.824efc52 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 8080020260630025241.6dbb3803 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 8080020260630025241.6dbb3803 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.8.0-8.el9_8 ~ * |
cpe:/a:redhat:enterprise_linux:9::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | 0:2.2.4-19.el9_2 ~ * |
cpe:/a:redhat:rhel_e4s:9.2::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | 0:2.4.5-26.el9_4 ~ * |
cpe:/a:redhat:rhel_e4s:9.4::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:2.6.1-22.el9_6 ~ * |
cpe:/a:redhat:rhel_eus:9.6::appstream
|
|
| Red Hat | Red Hat Directory Server 13.2 | 1783452100 ~ * |
cpe:/a:redhat:directory_server:13.2::el10
|
|
| 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 6 | - |
cpe:/o:redhat:enterprise_linux:6
|
|
II. Public POCs for CVE-2026-11610
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-11610 (18)
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🔗 RHSA-2026:36641 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:36205 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:36198 - Security Advisory - Red Hat 客户门户网站 Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:36202 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:36206 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:36204 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:36670 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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V. Comments for CVE-2026-11610
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