podman: buildah: Container breakout by using --jobs=2 and a race condition when building a malicious Containerfile

A vulnerability was found in podman build and buildah. This issue occurs in a container breakout by using --jobs=2 and a race condition when building a malicious Containerfile. SELinux might mitigate it, but even with SELinux on, it still allows the enumeration of files and directories on the hos...