RHSA-2021:3443: Red Hat Security Advisory: kpatch-patch security update

An update 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.This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel. Security Fix(es):

• kernel: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c (CVE-2021-0512)
• kernel: use-after-free in route4_change() in net/sched/cls_route.c (CVE-2021-3715)
• kernel: powerpc: KVM guest OS users can cause host OS memory corruption (CVE-2021-37576) 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. Related CVEs:
• CVE-2021-0512: kernel: out-of-bounds write due to a heap buffer overflow in __hidinput_change_resolution_multipliers() of hid-input.c
• CVE-2021-3715: kernel: use-after-free in route4_change() in net/sched/cls_route.c
• CVE-2021-37576: kernel: powerpc: KVM guest OS users can cause host OS memory corruption