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Install Stable:
2.2.0-2.6.32.19
Last updated: 08/19/10

Test:
2.2.0-2.6.34.4
Last updated: 08/19/10
grsecurity
grsecurity is an innovative approach to security utilizing a multi-layered detection, prevention, and containment model. It is licensed under the GNU GPL.
It offers among many other features:
  • An intelligent and robust Role-Based Access Control (RBAC) system that can generate least privilege policies for your entire system with no configuration
  • Change root (chroot) hardening
  • /tmp race prevention
  • Extensive auditing
  • Prevention of arbitrary code execution, regardless of the technique used (stack smashing, heap corruption, etc)
  • Prevention of arbitrary code execution in the kernel
  • Randomization of the stack, library, and heap bases
  • Kernel stack base randomization
  • Protection against exploitable null-pointer dereference bugs in the kernel
  • Reduction of the risk of sensitive information being leaked by arbitrary-read kernel bugs
  • A restriction that allows a user to only view his/her processes
  • Security alerts and audits that contain the IP address of the person causing the alert

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