Moderate: kernel security and bug fix update

Synopsis

Moderate: kernel security and bug fix update

Type/Severity

Security Advisory: Moderate

Topic

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 Moderate. 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: soft-lockups in iov_iter_copy_from_user_atomic() could result in DoS (CVE-2020-25641)
  

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):

• Please backport Jitter Entropy patches (BZ#1884682)
  
• Sometimes hit "error: kvm run failed Bad address" when launching a guest on Power8 (BZ#1890883)
  
• [Intel 8.3 BUG] Unable to insert 'i10nm_edac.ko' EDAC kernel module on JVL after CPU upgraded (BZ#1893330)
  
• RHEL8.1 - Random memory corruption may occur due to incorrect tlbflush (BZ#1899209)
  
• RHEL8.1 Alpha - ISST-LTE:PNV:Witherspoon-DD2.3:woo: KDUMP hang during shutdown, lpfc loses connection to disks (rootdisk:nvme) (BZ#1900101)
  
• pmtu of 1280 for vxlan as bridge port won't work (BZ#1902083)
  
• Allocating domain failed for ehci-pci device (BZ#1902801)
  
• [Azure][RHEL8] IP forwarding issue in netvsc (BZ#1904326)
  
• pmtu not working with tunnels as bridge ports and br_netfilter loaded (BZ#1907577)
  
• [Regression] RHEL8.2 - [kernel 148.el8] cpu (sys) time regression in SAP HANA 2.0 benchmark benchInsertSubSelectPerformance (BZ#1908520)

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 - Extended Update Support 8.2 x86_64
• Red Hat Enterprise Linux Server - AUS 8.2 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.2 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.2 ppc64le
• Red Hat Enterprise Linux Server - TUS 8.2 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.2 aarch64
• Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 8.2 ppc64le
• Red Hat Enterprise Linux Server - Update Services for SAP Solutions 8.2 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.2 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.2 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.2 aarch64

Fixes

• BZ - 1881424 - CVE-2020-25641 kernel: soft-lockups in iov_iter_copy_from_user_atomic() could result in DoS

CVEs

• CVE-2020-25641

References

• https://access.redhat.com/security/updates/classification/#moderate