Уязвимости systemd

systemd-homed: local privilege escalation via missing home-record signature verification on the authenticate path

systemd-homed contains a local privilege escalation bug via arbitrary system group addition to a local, logged in, homed-managed user

• Обновитесь до 255.4-1ubuntu8.17

systemd-oomd: unprivileged users can terminate arbitrary processes

Local unprivileged users can terminate arbitrary local processes via a systemd-oomd IPC API due to a missing path traversal validation.

• Обновитесь до 255.4-1ubuntu8.17

CVE-2026-40228

In systemd 259, systemd-journald can send ANSI escape sequences to the terminals of arbitrary users when a "logger -p emerg" command is executed, if ForwardToWall=yes is set.

CVE-2026-40226

In nspawn in systemd 233 through 259 before 260, an escape-to-host action can occur via a crafted optional config file.

• Обновитесь до 255.4-1ubuntu8.16

CVE-2026-40225

In udev in systemd before 260, local root execution can occur via malicious hardware devices and unsanitized kernel output.

• Обновитесь до 255.4-1ubuntu8.14

systemd: Local unprivileged user can trigger an assert

systemd, a system and service manager, (as PID 1) hits an assert and freezes execution when an unprivileged IPC API call is made with spurious data. On version v249 and older the effect is not an assert, but stack overwriting, with the attacker controlled content. From version v250 and newer this is not possible as the safety check causes an assert instead. This IPC call was added in v239, so versions older than that are not affected. Versions 260-rc1, 259.2, 258.5, and 257.11 contain patches. No known workarounds are available.

• Обновитесь до 255.4-1ubuntu8.14

Systemd-coredump: race condition that allows a local attacker to crash a suid program and gain read access to the resulting core dump

A vulnerability was found in systemd-coredump. This flaw allows an attacker to force a SUID process to crash and replace it with a non-SUID binary to access the original's privileged process coredump, allowing the attacker to read sensitive data, such as /etc/shadow content, loaded by the original process. A SUID binary or process has a special type of permission, which allows the process to run with the file owner's permissions, regardless of the user executing the binary. This allows the process to access more restricted data than unprivileged users or processes would be able to. An attacker can leverage this flaw by forcing a SUID process

• Обновитесь до 255.4-1ubuntu8.8