RHSA-2020:4060: Important: kernel security, bug fix, and enhancement update

The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: use-after-free in sound/core/timer.c (CVE-2019-19807)</li> <li> kernel: out of bounds write in function i2csmbusxferemulated in drivers/i2c/i2c-core-smbus.c (CVE-2017-18551)</li> <li> kernel: race condition in smptasktimedout() and smptaskdone() in drivers/scsi/libsas/sasexpander.c leads to use-after-free (CVE-2018-20836)</li> <li> kernel: out of bounds write in i2c driver leads to local escalation of privilege (CVE-2019-9454)</li> <li> kernel: use after free due to race condition in the video driver leads to local privilege escalation (CVE-2019-9458)</li> Space precludes documenting all of the security fixes in this advisory. See the descriptions of the remaining security fixes in the related Knowledge Article:<br><a href="https://access.redhat.com/articles/5442421" target="blank">https://access.redhat.com/articles/5442421</a> 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>Additional Changes:<br>For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 Release Notes linked from the References section.