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Which Linux distributions enable AT_RANDOM canary initialisation by default, and since which version?

You can test if you have AT_RANDOM canary initialisation enabled by running:

LD_SHOW_AUXV=1 /bin/true | grep AT_RANDOM
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migrated from Apr 6 '10 at 0:53

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up vote 2 down vote accepted

Ubuntu uses a random canary by default. I believe all of the packages in apt are compiled with this canary, there maybe a few exceptions such as 3rd party repositories. I don't know if this specific AT_RANDOM canary is being used by anyone.

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