ubuntu-cve-2026-4105
Vulnerability from osv_ubuntu
Published
2026-03-17 00:00
Modified
2026-03-17 00:00
Summary
Details
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.
Severity
6.7 (Medium)
N/A (UNKNOWN)
{
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{
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"255.4-1ubuntu8.11",
"255.4-1ubuntu8.12"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libnss-myhostname",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "libnss-mymachines",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "libnss-resolve",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "libnss-systemd",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "libpam-systemd",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "libsystemd-dev",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "libsystemd-shared",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "libsystemd0",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "libudev-dev",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "libudev1",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-boot",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-boot-efi",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-boot-tools",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-container",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-coredump",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-cryptsetup",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-dev",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-homed",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-journal-remote",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-oomd",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-repart",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-resolved",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-standalone-shutdown",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-standalone-sysusers",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-standalone-tmpfiles",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-sysv",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-tests",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-timesyncd",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-ukify",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "systemd-userdbd",
"binary_version": "257.9-0ubuntu2.1"
},
{
"binary_name": "udev",
"binary_version": "257.9-0ubuntu2.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "systemd",
"purl": "pkg:deb/ubuntu/systemd@257.9-0ubuntu2.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"257.4-1ubuntu3",
"257.6-1ubuntu1",
"257.7-1ubuntu1",
"257.7-1ubuntu3",
"257.8-0ubuntu2",
"257.9-0ubuntu1",
"257.9-0ubuntu2",
"257.9-0ubuntu2.1"
]
}
],
"aliases": [],
"details": "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.",
"id": "UBUNTU-CVE-2026-4105",
"modified": "2026-03-17T00:00:00Z",
"published": "2026-03-17T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-4105"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-4105"
},
{
"type": "REPORT",
"url": "https://github.com/systemd/systemd/security/advisories/GHSA-4h6x-r8vx-3862"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-4105"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2447262"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-4105"
],
"withdrawn": "2026-03-19T05:25:34Z"
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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