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Red Hat 8.1 RHSA-2021:2106-01 Important: Kernel Security Issues

red hat
Calendar Grey May 25, 2021
Dist Redhat Esm H88
Crucial kernel vulnerability and patch release for Red Hat Enterprise Linux 8.1, tackling critical security flaws.
An update for kernel is now available for Red Hat Enterprise Linux 8.1 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: use after free in eventpoll.c may lead to escalation of privilege (CVE-2020-0466)
* kernel: Integer overflow in Intel(R) Graphics Drivers (CVE-2020-12362)
* kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)
* kernel: Use after free via PI futex state (CVE-2021-3347)
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):
* [Regression] RHEL8.2 - ISST-LTE:pVM:diapvmlp83:sum:memory DLPAR fails to add memory on multiple trials[mm/memory_hotplug.c:1163] (mm-) (BZ#1930170)
* RHEL8.3 - Include patch: powerpc/pci: Remove LSI mappings on device teardown (xive/pci) (BZ#1931926)
* [HPEMC 8.1 REGRESSION] skx_uncore: probe of 0008:80:08.0 failed with error -22 (BZ#1947115)
* [Azure][RHEL-8]Mellanox Patches To Prevent Kernel Hang In MLX4 (BZ#1952072)
* [HPEMC 8.4 REGRESSION]: perf/x86/intel/uncore kernel panic vulnerability on Haswell and Broadwell servers (BZ#1956686)

Topics%20covered

Topics Covered

security advisory bug fix kernel security Red Hat Enterprise Linux important kernel input validation integer overflow Red Hat Enterprise Important escalation of privilege

References

https://access.redhat.com/security/cve/CVE-2020-0466 https://access.redhat.com/security/cve/CVE-2020-12362 https://access.redhat.com/security/cve/CVE-2020-28374 https://access.redhat.com/security/cve/CVE-2021-3347 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux BaseOS EUS (v. 8.1):
Source: kernel-4.18.0-147.48.1.el8_1.src.rpm
aarch64: bpftool-4.18.0-147.48.1.el8_1.aarch64.rpm bpftool-debuginfo-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-core-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-cross-headers-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-debug-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-debug-core-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-debug-debuginfo-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-debug-devel-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-debug-modules-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-debug-modules-extra-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-debuginfo-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-devel-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-headers-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-modules-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-modules-extra-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-tools-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-tools-debuginfo-4.18.0-147.48.1.el8_1.aarch64.rpm kernel-tools-libs-4.18.0-147.48.1.el8_1.aarch64.rpm perf-4.18.0-147.48.1.el8_1.aarch64.rpm perf-debuginfo-4.18.0-147.48.1.el8_1.aarch64.rpm python3-perf-4.18.0-147.48.1.el8_1.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:2106-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2106
Issue date: 2021-05-25

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.1Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory bug fix kernel security Red Hat Enterprise Linux important kernel input validation integer overflow Red Hat Enterprise Important escalation of privilege

Relevant Releases Architectures

Red Hat CodeReady Linux Builder EUS (v. 8.1) - aarch64, ppc64le, x86_64

Red Hat Enterprise Linux BaseOS EUS (v. 8.1) - aarch64, noarch, ppc64le, s390x, x86_64

Bugs Fixed

1899804 - CVE-2020-28374 kernel: SCSI target (LIO) write to any block on ILO backstore

1920480 - CVE-2020-0466 kernel: use after free in eventpoll.c may lead to escalation of privilege

1922249 - CVE-2021-3347 kernel: Use after free via PI futex state

1930246 - CVE-2020-12362 kernel: Integer overflow in Intel(R) Graphics Drivers

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