RHSA-2021:1272: Red Hat Security Advisory: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 8.2 Extended Update Support. 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 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 read in libiscsi module (CVE-2021-27364)
• kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)
• kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363) 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):
• System Crash / Core dump while deleting VMs (BZ#1897687)
• various patches to stabilize the OPAL error log processing and the powernv dump processing (ESS) (BZ#1907302)
• Unable to receive the signal registered using mq_notify(). (BZ#1926111)
• SCTP “Address already in use” when no active endpoints from RHEL 8.2 onwards (BZ#1927522)
• enable CONFIG_RANDOM_TRUST_CPU (BZ#1928027)
• [mm] mm, oom: remove oom_lock from oom_reaper (BZ#1929739)
• Configuring the system with non-RT kernel will hang the system (BZ#1930737)
• fNIC driver needs a patch fix that addresses crash (BZ#1932460)
• OVS mistakenly using local IP as tun_dst for VXLAN packets (?) (BZ#1944670) Enhancement(s):
• mlx5: Hairpin Support in Switch Mode (BZ#1924690)
• Trace mode enablement in IMC to facilitate perf-kvm support (perf:) (BZ#1929696)
• ice: Enable Flow Director Support (BZ#1930780) Related CVEs:
• CVE-2021-3347: kernel: Use after free via PI futex state
• CVE-2021-27363: kernel: iscsi: unrestricted access to sessions and handles
• CVE-2021-27364: kernel: out-of-bounds read in libiscsi module
• CVE-2021-27365: kernel: heap buffer overflow in the iSCSI subsystem