An issue was discovered in GoGo Protobuf before 1.3.2. plugin/unmarshal/unmarshal.go lacks certain index validation, aka the "skippy peanut butter" issue. https://github.com/containerd/containerd/commit/1423e9199d701499d533210b87640d116ec0c76e CREATE(Triage):(User=admin) CVE-2021-3121 (https://nvd.nist.gov/vuln/detail/CVE-2021-3121)