Hi Paul,
A531 was deferred from CCO due to certain issues and A531a was released after fixing those issues. A531b is being released by end of november which will contain Bash and poodle vulnerabilities fix.
I am pretty sure ANM 5.2.4 will support A531a. I checked the release notes and there is nothing mentioned about any incompatibility with ANM.
Regards,
Kanwal
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