(RHSA-2021:1379) Important: kernel-alt security and bug fix update

The kernel-alt packages provide the Linux kernel version 4.x.

Security Fix(es):

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

• kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)

• kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)

• kernel: powerpc: guest can cause DoS on POWER9 KVM hosts (CVE-2020-11669)

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):

• Kernel oops when resizing ext4 filesystem [rhel-alt-7.6.z] (BZ#1790900)

• [ipv6][ipsec]:unregister_netdevice: waiting for lo to become free. Usage count = 4 (BZ#1920805)