RHSA-2021:1379: Red Hat Security Advisory: kernel-alt security and bug fix update

An update for kernel-alt is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.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) Related CVEs:
• CVE-2020-11669: kernel: powerpc: guest can cause DoS on POWER9 KVM hosts
• CVE-2021-3347: kernel: Use after free via PI futex state
• CVE-2021-27364: kernel: out-of-bounds read in libiscsi module
• CVE-2021-27365: kernel: heap buffer overflow in the iSCSI subsystem