Synopsis
Important: kernel security and bug fix update
Type/Severity
Security Advisory: Important
Topic
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.
Description
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)
Solution
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
Affected Products
-
Red Hat Enterprise Linux for x86_64 8 x86_64
-
Red Hat Enterprise Linux for IBM z Systems 8 s390x
-
Red Hat Enterprise Linux for Power, little endian 8 ppc64le
-
Red Hat Enterprise Linux for ARM 64 8 aarch64
-
Red Hat CodeReady Linux Builder for x86_64 8 x86_64
-
Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le
-
Red Hat CodeReady Linux Builder for ARM 64 8 aarch64
Fixes
- BZ - 1877571 - CVE-2020-25211 kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c
CVEs
References
Vulmon