encoding/pem: fix stack overflow in Decode. A large (more than 5 MB) PEM input can cause a stack overflow in Decode, leading the program to crash (CVE-2022-24675)
crypto/elliptic: tolerate all oversized scalars in generic P-256. A crafted scalar input longer than 32 bytes can cause P256().ScalarMult or P256().ScalarBaseMult to panic. Indirect uses through crypto/ecdsa and crypto/tls are unaffected. amd64, arm64, ppc64le, and s390x are unaffected. (CVE-2022-28327)