Linux kernel is vulnerable denial of service attacks. Remote unauthenticated attackers can achieve Program Counter control via a certain mishandle of a multithreaded case involving a packet_do_bind unregister action followed by a packet_notifier register action resulting in use-after-free vulnerability.
access.redhat.com/errata/RHBA-2019:0327
access.redhat.com/errata/RHSA-2019:0163
access.redhat.com/errata/RHSA-2019:0188
access.redhat.com/errata/RHSA-2019:1170
access.redhat.com/errata/RHSA-2019:1190
access.redhat.com/security/updates/classification/#important
access.redhat.com/security/vulnerabilities/mds
blogs.securiteam.com/index.php/archives/3731