CVE-2020-14356: Canonical Ubuntu Linux

High severity, CVSS 7.8. EPSS: 1% chance of exploitation in the next 30 days.

A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem in versions before 5.7.10 was found in the way when reboot the system. A local user could use this flaw to crash the system or escalate their privileges on the system.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only; version 20.04 only
• Debian Debian Linux: version 9.0 only
• Linux Linux Kernel: from 4.5, before 4.9.231 (fixed in 4.9.231); from 4.10, before 4.14.189 (fixed in 4.14.189); from 4.15, before 4.19.134 (fixed in 4.19.134); from 4.20, before 5.4.53 (fixed in 5.4.53); from 5.5, before 5.7.10 (fixed in 5.7.10)
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp Cloud Backup: affected versions not specified
• Netapp Hci Management Node: affected versions not specified
• Netapp Solidfire: affected versions not specified
• Netapp Solidfire Baseboard Management Controller Firmware: affected versions not specified
• Opensuse Leap: version 15.1 only; version 15.2 only
• Red Hat Enterprise Linux: version 8.0 only

Published 2020-08-19. Last modified 2026-06-17.