CVE-2011-1021: Linux Kernel

Low severity, CVSS 3.6. EPSS: 0.9% chance of exploitation in the next 30 days.

drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary kernel memory locations by leveraging root privileges to write to the /sys/kernel/debug/acpi/custom_method file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4347.

Affected products

• Linux Linux Kernel: up to and including 2.6.9; version 2.6.9 only

Published 2012-06-21. Last modified 2026-06-16.