CVE-2023-3567: Canonical Ubuntu Linux

High severity, CVSS 7.1. EPSS: 0.4% chance of exploitation in the next 30 days.

A use-after-free flaw was found in vcs_read in drivers/tty/vt/vc_screen.c in vc_screen in the Linux Kernel. This issue may allow an attacker with local user access to cause a system crash or leak internal kernel information.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only; version 20.04 only; version 22.04 only
• Linux Linux Kernel: before 6.2.0 (fixed in 6.2.0); version 6.2.0 only
• Red Hat Enterprise Linux: version 8.0 only; version 9.0 only

Published 2023-07-24. Last modified 2026-06-17.