CVE-2011-1011: Red Hat Enterprise Linux

Medium severity, CVSS 6.9. EPSS: 0.4% chance of exploitation in the next 30 days.

The seunshare_mount function in sandbox/seunshare.c in seunshare in certain Red Hat packages of policycoreutils 2.0.83 and earlier in Red Hat Enterprise Linux (RHEL) 6 and earlier, and Fedora 14 and earlier, mounts a new directory on top of /tmp without assigning root ownership and the sticky bit to this new directory, which allows local users to replace or delete arbitrary /tmp files, and consequently cause a denial of service or possibly gain privileges, by running a setuid application that relies on /tmp, as demonstrated by the ksu application.

Affected products

• Red Hat Enterprise Linux: version 3 only; version 4 only; version 5 only; version 6.0 only
• Red Hat Fedora: version 6 only; version 7 only; version 8 only; version 9 only; version 10 only; version 12 only; …
• Red Hat Policycoreutils: up to and including 2.0.83; version 1.0 only; version 1.1 only; version 1.2 only; version 1.4 only; version 1.6 only; …

Published 2011-02-24. Last modified 2026-06-16.