RHSA-2021:0686: Important: kernel security and bug fix update

The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: bad kfree in auditfilter.c may lead to escalation of privilege (CVE-2020-0444)</li> <li> kernel: locking issue in drivers/tty/ttyjobctrl.c can lead to an use-after-free (CVE-2020-29661)</li> <li> kernel: performance counters race condition use-after-free (CVE-2020-14351)</li> <li> kernel: ICMP rate limiting can be used for DNS poisoning attack (CVE-2020-25705)</li> For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.<br>Bug Fix(es):<br><li> [Hyper-V][RHEL-8] Request to included a commit that adds a timeout to vmbuswaitforunload (BZ#1913530)</li> <li> [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap (BZ#1929908)</li> <li> rpmbuild cannot build the userspace RPMs in the kernel package when the kernel itself is not built (BZ#1929912)</li>