GHSA-Q38V-WP89-2W55 sh _uid does not drop supplementary groups (incomplete privilege drop)

Impact The uid option performed an incomplete privilege drop on Linux/Unix-like systems. When sh was run from a process with elevated privileges, such as root, and a command was launched with uid=, the child process changed its UID and primary GID but did not reset its supplementary groups. As a...

PT-2026-60898

Name of the Vulnerable Software and Affected Versions sh versions prior to 2.2.4 Description A privilege management flaw exists on Linux/Unix-like systems where the uid option performs an incomplete privilege drop. When a privileged parent process spawns a child process using uid to reduce...