These are the problematic cards named in Canon's advisory:
The “xxx” at the end of the product number varies depending on the sales region.
SanDisk Extreme PRO CFast2.0 64GB (SDCFSP-064G-xxx)
SanDisk Extreme PRO CFast2.0 128GB (SDCFSP-128G-xxx)
SanDisk Extreme PRO CFast2.0 64GB (SDCFSP-064G-xxxA)
SanDisk Extreme PRO CFast2.0 128GB (SDCFSP-128G-xxxA)
SanDisk Extreme PRO CFast2.0 64GB (SDCFSP-064G-xxxB)
SanDisk Extreme PRO CFast2.0 128GB (SDCFSP-128G-xxxB)
Both Raw and JPEG files are affected, but the number of corrupted images varies according to the compression mode used. When shooting Raw, Canon recommends recording just one extra shot, but shooting small sized JPEGs will require 8 extra shots to protect other images on the card.