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CVE-2026-4105— Systemd: systemd: privilege escalation via improper access control in registermachine d-bus method

Quick assessment

Affected
Red Hat Red Hat Hardened Images
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.

Red Hat Enterprise Linux是美国红帽（Red Hat）公司的面向企业用户的Linux操作系统。 Red Hat Enterprise Linux 10存在访问控制错误漏洞，该漏洞源于访问控制不当，可能导致执行任意命令。

CVSS 6.7 · Medium EPSS 0.15% · P3

Affected Version Matrix 13

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
any affected
any affected
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
any affected
Red Hat Red Hat Enterprise Linux 9 any affected
any affected
Red Hat Red Hat Hardened Images 260.1-2.1.hum1< * unaffected
Red Hat Red Hat OpenShift Container Platform 4 any affected
any affected
any affected
any affected
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I. Basic Information for CVE-2026-4105

Vulnerability Information
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Vulnerability Title
Systemd: systemd: privilege escalation via improper access control in registermachine d-bus method
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in systemd. The systemd-machined service contains an Improper Access Control vulnerability due to insufficient validation of the class parameter in the RegisterMachine D-Bus (Desktop Bus) method. A local unprivileged user can exploit this by attempting to register a machine with a specific class value, which may leave behind a usable, attacker-controlled machine object. This allows the attacker to invoke methods on the privileged object, leading to the execution of arbitrary commands with root privileges on the host system.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat Enterprise Linux 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat Enterprise Linux是美国红帽（Red Hat）公司的面向企业用户的Linux操作系统。 Red Hat Enterprise Linux 10存在访问控制错误漏洞，该漏洞源于访问控制不当，可能导致执行任意命令。
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 Hardened Images 260.1-2.1.hum1 ~ * cpe:/a:redhat:hummingbird:1
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
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 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-4105

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III. Intelligence Information for CVE-2026-4105

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Vendor Advisories for CVE-2026-4105 (3)

Same Patch Batch · Red Hat · 2026-03-13 · 4 CVEs total

CVE-2026-4111 7.5 HIGH Libarchive: infinite loop denial of service in rar5 decompression via archive_read_data()
CVE-2025-57849 6.4 MEDIUM Fuse: privilege escalation via excessive /etc/passwd permissions
CVE-2025-8766 6.4 MEDIUM Noobaa-core: excessive permissions of /etc could lead to escalation of privilege in the no

IV. Related Vulnerabilities

Same product: Red Hat Hardened Images
Same vendor: Red Hat
Same weakness: CWE-284

V. Comments for CVE-2026-4105

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