RHSA-2021:0003 — Security Advisory

An update for kernel is now available for Red Hat Enterprise Linux 8.

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: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)

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):

• avoid flush_backlog IPI for isolated CPUs by configuring RPS cpumask (BZ#1883314)

• rngd consumes 100% cpu on rhel-8.3 system in fips mode (BZ#1886192)

• RHEL8.1 - Random memory corruption may occur due to incorrect tlbflush (BZ#1899208)

• fips mode boot is broken after adding extrng (BZ#1899584)

• pmtu of 1280 for vxlan as bridge port won't work (BZ#1902082)

• rpc task loop with kworker spinning at 100% CPU for 10 minutes when umount an NFS 4.x share with sec=krb5 triggered by unmount of the NFS share (BZ#1907667)