Your thread needs moving to the ESXi area, since you are not using the vSphere Management SDK - I've reported it to moderators who should move it, please don't create a duplicate.
This thread is similar and has guidance for you to follow: https://communities.vmware.com/t5/VMware-vSphere-Discussions/dlmalloc-c-4908-Corruption-in-dlmalloc/...
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