CVE-2026-11774— 389-ds-base: 389-ds-base: integer overflow in sasl packet length bypasses size limit leading to heap buffer overflow
Quick assessment
Affected
Red Hat Red Hat Directory Server 11.5 E4S for RHEL 8
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存在输入验证错误漏洞，该漏洞源于SASL I/O层整数溢出，在sasl_io_start_packet()中，将sizeof(uint32_t)添加到特制SASL数据包长度前缀0xFFFFFFFC导致无符号环绕为零，绕过nsslapd-maxsasliosize限制，导致堆缓冲区溢出，攻击者可控制约2兆字节数据，可能导致拒
Possible ATT&CK Techniques 2 AI
T1190 · Exploit Public-Facing Application T1203 · Exploitation for Client ExecutionAffected Version Matrix 23
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I. Basic Information for CVE-2026-11774
Vulnerability Information
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Vulnerability Title
389-ds-base: 389-ds-base: integer overflow in sasl packet length bypasses size limit leading to heap buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
An integer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). In sasl_io_start_packet(), adding sizeof(uint32_t) to a crafted SASL packet length prefix of 0xFFFFFFFC causes unsigned wraparound to zero, bypassing the nsslapd-maxsasliosize limit and leading to a heap buffer overflow of up to approximately 2 megabytes of attacker-controlled data. After a successful SASL bind with integrity protection (SSF > 0), a remote attacker can cause a Denial of Service (DoS) or achieve Remote Code Execution (RCE). In FreeIPA and Red Hat Identity Management deployments, any domain user with a valid Kerberos ticket, enrolled host, or service account can trigger this vulnerability over the network. This flaw is independent of CVE-2025-14905, which patched schema.c only and did not modify sasl_io.c.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
389 Directory Server 输入验证错误漏洞
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存在输入验证错误漏洞，该漏洞源于SASL I/O层整数溢出，在sasl_io_start_packet()中，将sizeof(uint32_t)添加到特制SASL数据包长度前缀0xFFFFFFFC导致无符号环绕为零，绕过nsslapd-maxsasliosize限制，导致堆缓冲区溢出，攻击者可控制约2兆字节数据，可能导致拒
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 11.5 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
|
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| 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-2026-11774
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-11774 (19)
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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
Same Patch Batch · Red Hat · 2026-06-11 · 5 CVEs total
| CVE-2026-53701 | 6.5 MEDIUM | Gstreamer1-plugins-bad-free: gstreamer: out-of-bounds write in h.266/vvc pps picture parti |
| CVE-2026-53702 | 6.5 MEDIUM | Gstreamer1-plugins-bad-free: gstreamer: stack buffer overflow in h.265 buffering period se |
| CVE-2026-11850 | 5.0 MEDIUM | Krb5: krb5: integer underflow in berval2tl_data() leads to heap out-of-bounds read |
| CVE-2026-11986 | 4.9 MEDIUM | Keycloak-rest-admin-ui-ext: authorization bypass vulnerability in the admin-ui-ext bulk ro |
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V. Comments for CVE-2026-11774
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