This update for go1.16 fixes the following issues:
go1.16.6 (released 2021-07-12, bsc#1182345) includes a security fix to the crypto/tls package, as well as bug fixes to the compiler, and the net and net/http packages.
Security issue fixed:
CVE-2021-34558: Fixed crypto/tls: clients can panic when provided a certificate of the wrong type for the negotiated parameters (bsc#1188229)
go1.16 release: