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ASLR is Disabled on an Oracle Linux 7 Cloud Instance

edited Jun 20, 2022 6:28AM in Linux

In standard Oracle Linux 7 OCI instances, ASLR is enabled by default and the corresponding kernel parameter is set to kernel.randomize_va_space = 2

ASLR is a feature of the linux kernel which provides additional security by randomizing the memory addresses of memory segments used by processes, and in standard Oracle Linux 7 cloud instances it is enabled by default, via the following kernel parameter setting:

kernel.randomize_va_space = 2

However, depending on the application running on the linux instance, using ASLR may cause problems if the application expects a shared memory segment to remain accessible at the same memory location.

One such application is Oracle database versions 11 and 12 where it is recommended to keep ASLR off, to prevent errors, such as the following:

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