Details for this vulnerability have not been published by NIST at this point. Descriptions from software vendor advisories for this issue are provided below.
From VID-6A5D15B6-B661-11EA-8015-E09467587C17:
Chrome Releases reports:
This update includes 2 security fixes, including:
[1092308] High CVE-2020-6509: Use after free in extensions.
Reported by Anonymous on 2020-06-08
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