kernel: security: The built-in keyrings for security tokens can be joined as a session and then modified by the root user

It was discovered that root can gain direct access to an internal keyring, such as '.dnsresolver' in RHEL-7 or '.builtintrustedkeys' upstream, by joining it as its session keyring. This allows root to bypass module signature verification by adding a new public key of its own devising to the keyri...

kernel: security: The built-in keyrings for security tokens can be joined as a session and then modified by the root user

It was discovered that root can gain direct access to an internal keyring, such as '.dnsresolver' in RHEL-7 or '.builtintrustedkeys' upstream, by joining it as its session keyring. This allows root to bypass module signature verification by adding a new public key of its own devising to the keyri...