(RHSA-2021:3522) Important: kernel security and bug fix update

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: Use after free via PI futex state (CVE-2021-3347)

• kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)

• kernel: race condition for removal of the HCI controller (CVE-2021-32399)

• kernel: use-after-free in n_tty_receive_buf_common function in drivers/tty/n_tty.c (CVE-2020-8648)

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.

Bug Fix(es):

• sysfs: cannot create duplicate filename '/class/mdio_bus/ixgbe-8100 (BZ#1972707)

• [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap [7.9.z] (BZ#1975158)

• SAN Switch rebooted and caused (?) OpenStack compute node to reboot (BZ#1984118)