In utils.c in zsh before 5.4, symlink expansion had a buffer overflow.
{ "ubuntu_priority": "medium", "availability": "No subscription required", "binaries": [ { "binary_name": "zsh", "binary_version": "5.1.1-1ubuntu2.1" }, { "binary_name": "zsh-common", "binary_version": "5.1.1-1ubuntu2.1" }, { "binary_name": "zsh-dbg", "binary_version": "5.1.1-1ubuntu2.1" }, { "binary_name": "zsh-dbgsym", "binary_version": "5.1.1-1ubuntu2.1" }, { "binary_name": "zsh-dev", "binary_version": "5.1.1-1ubuntu2.1" }, { "binary_name": "zsh-doc", "binary_version": "5.1.1-1ubuntu2.1" }, { "binary_name": "zsh-static", "binary_version": "5.1.1-1ubuntu2.1" }, { "binary_name": "zsh-static-dbgsym", "binary_version": "5.1.1-1ubuntu2.1" } ] }