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Grsecurity has been developed and maintained in our free time for the past 13 years. Please contribute toward the project's continued research and development in Linux security. Businesses are encouraged to purchase an annual support contract for direct access to grsecurity developers in the event of any deployment issues.

Grsecurity and gradm are licensed under the GNU GPL version 2 only.
Know your rights! As a customer of any product that uses grsecurity in binary form, you are entitled to the complete corresponding source code. Companies who do not ship the complete corresponding source code alongside distributed binaries must provide you with a written offer for the source code transferrable to any other person and valid for three years. Please report any violations of our GPL license to

For instructions on how to compile a grsecurity-enabled kernel, see the documentation.

grsecurity - stable kernel patch

grsecurity - stable w/ vserver kernel patch

grsecurity - test kernel patch

gradm - RBAC administration utility

iptables patch for xt_gradm support

paxctld - PaX flags maintenance daemon - binary packages

paxctld - PaX flags maintenance daemon - source packages

Git repositories

Git repositories for gradm and a regression suite are available here.

Verify these downloads with GPG

You can download the key used to sign these files here

Bradley Spengler (spender) <spender at grsecurity dot net>
Fingerprint: DE94 52CE 46F4 2094 907F 108B 44D1 C0F8 2525 FE49
Signed by: 39F081BF The PaX Team <pageexec at freemail dot hu>