CVE-2011-2495: Linux Kernel

Low severity, CVSS 2.1. EPSS: 0.5% chance of exploitation in the next 30 days.

fs/proc/base.c in the Linux kernel before 2.6.39.4 does not properly restrict access to /proc/#####/io files, which allows local users to obtain sensitive I/O statistics by polling a file, as demonstrated by discovering the length of another user's password.

Affected products

• Linux Linux Kernel: up to and including 2.6.39.3; version 2.6.39 only; version 2.6.39.1 only; version 2.6.39.2 only

Published 2012-06-13. Last modified 2026-06-16.