| Name | CVE-2026-4105 |
| 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 (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-4533-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| systemd (PTS) | bullseye | 247.3-7+deb11u5 | vulnerable |
| bullseye (security) | 247.3-7+deb11u8 | fixed | |
| bookworm | 252.39-1~deb12u2 | fixed | |
| bookworm (security) | 252.38-1~deb12u1 | vulnerable | |
| trixie | 257.13-1~deb13u1 | fixed | |
| forky | 260.1-1 | fixed | |
| sid | 261~rc2-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| systemd | source | bullseye | 247.3-7+deb11u8 | DLA-4533-1 | ||
| systemd | source | bookworm | 252.39-1~deb12u2 | |||
| systemd | source | trixie | 257.13-1~deb13u1 | |||
| systemd | source | (unstable) | 260~rc3-1 |
https://github.com/systemd/systemd/security/advisories/GHSA-4h6x-r8vx-3862
Introduced with: https://github.com/systemd/systemd/commit/fbe550738d03b178bb004a1390e74115e904118a (v225)
Fixed by: https://github.com/systemd/systemd/commit/6df5f80bd374be1b45c52d740e88f0236da922c7 (v260-rc3)
Fixed by: https://github.com/systemd/systemd/commit/497d0172416cbb5b70f96b95399d041407c223bd (v259.4)
Fixed by: https://github.com/systemd/systemd/commit/6941d92dc299667036cbe264435971cec59ebc76 (v257.12)