{"id":"CVE-2026-4105","title":"A flaw was found in systemd","summary":"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 use…","severity":"medium","cvss":6.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-284"],"published":"2026-03-13","updated":"2026-08-21","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-4105","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:7299","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-4105","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2447262","label":"secalert@redhat.com"},{"url":"https://github.com/systemd/systemd/security/advisories/GHSA-4h6x-r8vx-3862","label":"secalert@redhat.com"}],"tags":["nvd"],"epss":0.00142,"epssPercentile":0.03851,"ingestedAt":"2026-08-21T14:17:57.274Z","slug":"CVE-2026-4105","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":36.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}