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CVE-2026-4408— Samba 操作系统命令注入漏洞

一分钟漏洞结论

影响对象
Red Hat Red Hat Enterprise Linux 10
利用判断
尚无明确在野利用证据,仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本;无法立即升级时,限制受影响服务暴露并加强监测。

Samba是Samba开源的一个适用于 Linux 和 Unix 的标准 Windows 互操作性程序套件。 Samba存在操作系统命令注入漏洞,该漏洞源于check password script功能中%u替换字符未正确转义shell元字符,可能导致远程命令执行。

CVSS 9.0 · Critical EPSS 1.75% · P77

影响版本矩阵 30

厂商产品 版本范围状态
Red Hat Red Hat Enterprise Linux 10 0:4.23.5-109.el10_2< * unaffected
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:4.21.3-114.el10_0.1< * unaffected
Red Hat Red Hat Enterprise Linux 6 全部 unknown
全部 unknown
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:4.10.16-26.el7_9.1< * unaffected
0:4.10.16-26.el7_9.1< * unaffected
Red Hat Red Hat Enterprise Linux 8 0:4.19.4-16.el8_10< * unaffected
0:4.19.4-16.el8_10< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.13.3-12.el8_4.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:4.13.3-12.el8_4.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:4.15.5-16.el8_6.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.15.5-16.el8_6.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.17.5-7.el8_8.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.17.5-7.el8_8.1< * unaffected
Red Hat Red Hat Enterprise Linux 9 0:4.23.5-10.el9_8< * unaffected
0:4.23.5-10.el9_8< * unaffected
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:4.17.5-105.el9_2.5< * unaffected
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:4.19.4-105.el9_4.4< * unaffected
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:4.21.3-14.el9_6.1< * unaffected
Red Hat Red Hat OpenShift Container Platform 4 全部 affected
Red Hat Red Hat OpenShift Container Platform 4.12 412.86.202608241157-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.13 413.92.202609080414-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.14 414.92.202608172040-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.15 415.92.202608180329-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.16 416.94.202608150307-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.17 417.94.202608250221-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.18 418.94.202608142238-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202606241344-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.20 4.20.9.6.202606241928-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.21 4.21.9.6.202606241859-0< * unaffected
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一、 漏洞 CVE-2026-4408 基础信息

漏洞信息

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Vulnerability Title
Samba: remote code execution in samr
来源: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the "check password script" feature. If this script is configured with the %u substitution character, the client-controlled username is passed without proper escaping of shell meta-characters. This vulnerability allows an attacker to achieve remote command execution on the affected system. This issue primarily affects non-standard configurations where the "check password script" is used with %u and the samba-dcerpcd service is started as a system service.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
来源: CVE Program / CVE List V5
Vulnerability Title
Samba 操作系统命令注入漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Samba是Samba开源的一个适用于 Linux 和 Unix 的标准 Windows 互操作性程序套件。 Samba存在操作系统命令注入漏洞,该漏洞源于check password script功能中%u替换字符未正确转义shell元字符,可能导致远程命令执行。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
Red Hat Red Hat Enterprise Linux 10 0:4.23.5-109.el10_2 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:4.21.3-114.el10_0.1 ~ * cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:4.10.16-26.el7_9.1 ~ * cpe:/o:redhat:enterprise_linux:7::server
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:4.10.16-26.el7_9.1 ~ * cpe:/o:redhat:enterprise_linux:7::server
Red Hat Red Hat Enterprise Linux 8 0:4.19.4-16.el8_10 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8 0:4.19.4-16.el8_10 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.13.3-12.el8_4.1 ~ * cpe:/o:redhat:rhel_aus:8.4::baseos
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:4.13.3-12.el8_4.1 ~ * cpe:/o:redhat:rhel_aus:8.4::baseos
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:4.15.5-16.el8_6.1 ~ * cpe:/a:redhat:rhel_aus:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:4.15.5-16.el8_6.1 ~ * cpe:/a:redhat:rhel_aus:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:4.17.5-7.el8_8.1 ~ * cpe:/a:redhat:rhel_e4s:8.8::appstream
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:4.17.5-7.el8_8.1 ~ * cpe:/a:redhat:rhel_e4s:8.8::appstream
Red Hat Red Hat Enterprise Linux 9 0:4.23.5-10.el9_8 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9 0:4.23.5-10.el9_8 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:4.17.5-105.el9_2.5 ~ * cpe:/a:redhat:rhel_e4s:9.2::appstream
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:4.19.4-105.el9_4.4 ~ * cpe:/a:redhat:rhel_e4s:9.4::appstream
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:4.21.3-14.el9_6.1 ~ * cpe:/a:redhat:rhel_eus:9.6::appstream
Red Hat Red Hat OpenShift Container Platform 4.12 412.86.202608241157-0 ~ * cpe:/a:redhat:openshift:4.12::el8
Red Hat Red Hat OpenShift Container Platform 4.13 413.92.202609080414-0 ~ * cpe:/a:redhat:openshift:4.13::el9
Red Hat Red Hat OpenShift Container Platform 4.14 414.92.202608172040-0 ~ * cpe:/a:redhat:openshift:4.14::el9
Red Hat Red Hat OpenShift Container Platform 4.15 415.92.202608180329-0 ~ * cpe:/a:redhat:openshift:4.15::el9
Red Hat Red Hat OpenShift Container Platform 4.16 416.94.202608150307-0 ~ * cpe:/a:redhat:openshift:4.16::el9
Red Hat Red Hat OpenShift Container Platform 4.17 417.94.202608250221-0 ~ * cpe:/a:redhat:openshift:4.17::el9
Red Hat Red Hat OpenShift Container Platform 4.18 418.94.202608142238-0 ~ * cpe:/a:redhat:openshift:4.18::el9
Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202606241344-0 ~ * cpe:/a:redhat:openshift:4.19::el9
Red Hat Red Hat OpenShift Container Platform 4.20 4.20.9.6.202606241928-0 ~ * cpe:/a:redhat:openshift:4.20::el9
Red Hat Red Hat OpenShift Container Platform 4.21 4.21.9.6.202606241859-0 ~ * cpe:/a:redhat:openshift:4.21::el9
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

二、漏洞 CVE-2026-4408 的公开POC

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三、漏洞 CVE-2026-4408 的情报信息

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CVE-2026-4408 补丁与修复 (1)

CVE-2026-4408 厂商安全公告 (13)

CVE-2026-4408 其他参考 (9)

同批安全公告 · Red Hat · 2026-05-28 · 共 14 条

CVE-2026-9804 7.7 HIGH Kubevirt 后置链接漏洞
CVE-2026-9795 7.3 HIGH Keycloak 安全漏洞
CVE-2026-44604 7.0 HIGH rpm 操作系统命令注入漏洞
CVE-2026-9802 6.8 MEDIUM Keycloak 代码问题漏洞
CVE-2026-9792 6.5 MEDIUM Keycloak 安全漏洞
CVE-2026-9796 6.5 MEDIUM Keycloak 安全漏洞
CVE-2026-9793 5.9 MEDIUM Keycloak 数据伪造问题漏洞
CVE-2026-9794 5.3 MEDIUM Keycloak 安全漏洞
CVE-2026-9803 5.3 MEDIUM Keycloak 缓冲区错误漏洞
CVE-2026-9801 4.9 MEDIUM Keycloak 安全漏洞
CVE-2026-9791 4.3 MEDIUM Keycloak 安全漏洞
CVE-2026-9798 4.3 MEDIUM Keycloak 安全漏洞
CVE-2026-10028 4.3 MEDIUM glib 安全漏洞

IV. Related Vulnerabilities

V. Comments for CVE-2026-4408

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