RHSA-2020:4062: Important: kernel-rt security and bug fix update

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.Security Fix(es): kernel: use-after-free in sound/core/timer.c (CVE-2019-19807) kernel: out of bounds write in function i2csmbusxferemulated in drivers/i2c/i2c-core-smbus.c (CVE-2017-18551) kernel: race condition in smptasktimedout() and smptaskdone() in drivers/scsi/libsas/sasexpander.c leads to use-after-free (CVE-2018-20836) kernel: out of bounds write in i2c driver leads to local escalation of privilege (CVE-2019-9454) kernel: use after free due to race condition in the video driver leads to local privilege escalation (CVE-2019-9458) Space precludes documenting all of the security fixes in this advisory. See the descriptions of the remaining security fixes in the related Knowledge Article:https://access.redhat.com/articles/5442481 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.Additional Changes:For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes linked from the References section.