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CVE PROGRAM SOURCE RECORD9.0 Critical

CVE-2026-4408

Samba: remote code execution in samr

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
redhat

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Red Hat Red Hat Enterprise Linux 10

Default version status: affected

  • 0:4.23.5-109.el10_2 to < *unaffected

Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support

Default version status: affected

  • 0:4.21.3-114.el10_0.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support

Default version status: affected

  • 0:4.10.16-26.el7_9.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support

Default version status: affected

  • 0:4.10.16-26.el7_9.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

  • 0:4.19.4-16.el8_10 to < *unaffected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

  • 0:4.19.4-16.el8_10 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

Default version status: affected

  • 0:4.13.3-12.el8_4.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Default version status: affected

  • 0:4.13.3-12.el8_4.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

Default version status: affected

  • 0:4.15.5-16.el8_6.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Default version status: affected

  • 0:4.15.5-16.el8_6.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Default version status: affected

  • 0:4.17.5-7.el8_8.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

Default version status: affected

  • 0:4.17.5-7.el8_8.1 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:4.23.5-10.el9_8 to < *unaffected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

  • 0:4.23.5-10.el9_8 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Default version status: affected

  • 0:4.17.5-105.el9_2.5 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Default version status: affected

  • 0:4.19.4-105.el9_4.4 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support

Default version status: affected

  • 0:4.21.3-14.el9_6.1 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.12

Default version status: affected

  • 412.86.202608241157-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.13

Default version status: affected

  • 413.92.202609080414-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.14

Default version status: affected

  • 414.92.202608172040-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.15

Default version status: affected

  • 415.92.202608180329-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.16

Default version status: affected

  • 416.94.202608150307-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.17

Default version status: affected

  • 417.94.202608250221-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.18

Default version status: affected

  • 418.94.202608142238-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.19

Default version status: affected

  • 4.19.9.6.202606241344-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.20

Default version status: affected

  • 4.20.9.6.202606241928-0 to < *unaffected

Red Hat Red Hat OpenShift Container Platform 4.21

Default version status: affected

  • 4.21.9.6.202606241859-0 to < *unaffected

Red Hat Red Hat Enterprise Linux 6

Default version status: unknown

Red Hat Red Hat Enterprise Linux 6

Default version status: unknown

References