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Red Hat Enterprise Linux 8.2: RHSA-2021:0073 Moderate: DoS Kernel Fix

red hat
Calendar Grey January 12, 2021
Dist Redhat Esm H88
Canonical releases an essential patch for kernel addressing DDoS flaws in Ubuntu 20.04 LTS.
An update for kernel is now available for Red Hat Enterprise Linux 8.2 Extended Update Support

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.

Summary

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)

Topics%20covered

Topics Covered

security advisory moderate security issue Red Hat update DoS Red Hat Enterprise Linux kernel kernel issue

References

https://access.redhat.com/security/cve/CVE-2020-25641 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux BaseOS EUS (v. 8.2):
Source: kernel-4.18.0-193.40.1.el8_2.src.rpm
aarch64: bpftool-4.18.0-193.40.1.el8_2.aarch64.rpm bpftool-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-core-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-cross-headers-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-debug-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-debug-core-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-debug-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-debug-devel-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-debug-modules-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-debug-modules-extra-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-devel-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-headers-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-modules-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-modules-extra-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-tools-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-tools-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm kernel-tools-libs-4.18.0-193.40.1.el8_2.aarch64.rpm perf-4.18.0-193.40.1.el8_2.aarch64.rpm perf-debuginfo-4.18.0-193.40.1.el8_2.aarch64.rpm python3-perf-4.18.0-193.40.1.el8_2.aarch64.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:0073-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0073
Issue date: 2021-01-12

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.2Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate security issue Red Hat update DoS Red Hat Enterprise Linux kernel kernel issue

Relevant Releases Architectures

Red Hat CodeReady Linux Builder EUS (v. 8.2) - aarch64, ppc64le, x86_64

Red Hat Enterprise Linux BaseOS EUS (v. 8.2) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

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

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