CVE-2022-29162

runc is a CLI tool for spawning and running containers on Linux according
to the OCI specification. A bug was found in runc prior to version 1.1.2
where runc exec --cap created processes with non-empty inheritable Linux
process capabilities, creating an atypical Linux environment and enabling
programs with inheritable file capabilities to elevate those capabilities
to the permitted set during execve(2). This bug did not affect the
container security sandbox as the inheritable set never contained more
capabilities than were included in the container’s bounding set. This bug
has been fixed in runc 1.1.2. This fix changes runc exec --cap behavior
such that the additional capabilities granted to the process being executed
(as specified via --cap arguments) do not include inheritable
capabilities. In addition, runc spec is changed to not set any
inheritable capabilities in the created example OCI spec (config.json)
file.