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-64575BB6-E188-11EA-BEED-E09467587C17:
Chrome Releases reports:
This release contains one security fix:
[1115345] High CVE-2020-6556: Heap buffer overflow in
SwiftShader. Reported by Alison Huffman, Microsoft Browser
Vulnerability Research on 2020-08-12
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