The Linux kernel from v2.3.36 before v2.6.39 allows local unprivileged users to cause a denial of service (memory consumption) by triggering creation of PTE pages.
https://usn.ubuntu.com/1167-1/
https://security-tracker.debian.org/tracker/CVE-2011-2498
https://people.canonical.com/~ubuntu-security/cve/2011/CVE-2011-2498.html