Medium (5.3) in canonical cloud-init. EPSS 0.1% chance of exploitation in the next 30 days.
cloud-init through 25.1.2 includes the systemd socket unit cloud-init-hotplugd.socket with default SocketMode that grants 0666 permissions, making it world-writable. This is used for the "/run/cloud-init/hook-hotplug-cmd" FIFO. An unprivileged user could trigger hotplug-hook commands.
Severity
CVSS 3.1
5.3 medium
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
EPSS
0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-31)