CVE-2016-9604

It was discovered in the Linux kernel before 4.11-rc8 that root can gain direct access to an internal keyring, such as ‘.dns_resolver’ in RHEL-7 or ‘.builtin_trusted_keys’ 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 keyring.

Date published : 2018-07-11

http://www.securityfocus.com/bid/102135

http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-9604.html