CVE-2021-20208: 14651 – CVE-2021-20208 [SECURITY][EMBARGOED] cifs-utils: cifs.upcall kerberos auth leak in container

A flaw was found in cifs-utils in versions before 6.13. A user when mounting a krb5 CIFS file system from within a container can use Kerberos credentials of the host. The highest threat from this vulnerability is to data confidentiality and integrity.