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Editorial Team
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Asked: 2026-06-06T17:31:29+00:00

I would like to disable address space layout randomization (ASLR) on my system (Ubuntu

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I would like to disable address space layout randomization (ASLR) on my system (Ubuntu Gnu/Linux 2.6.32-41-server), but, if I use

sysctl -w kernel.randomize_va_space=0

the change would affect all users on the system, I presume. (Is this true?) How can I limit the effects of disabling ASLR to myself as a user only, or only to the shell session in which I invoke the command to disable?

BTW, I see that my system’s current (default) setting is

kernel.randomize_va_space = 2

Why 2 and not 1 or 3? Where can I find documentation about the numerical values of /proc/sys settings, their ranges, and their meanings? Thanks!

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1 Answer

  1. Editorial Team

    The documentation for the randomize_va_space sysctl setting is in Documentation/sysctl/kernel.txt in the kernel source tree. Basically,

    0 – Turn the process address space randomization off.

    1 – Make the addresses of mmap base, stack and VDSO page randomized.

    2 – Additionally enable heap randomization.

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