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Red Hat: RHSA-2021:2185-01 Important: Kernel Escalation Risk

red hat
Calendar Grey June 1, 2021
Dist Redhat Esm H88
Urgent patch released for CentOS 7.6 focusing on essential vulnerabilities and system flaws.
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: 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: DoS by corrupting mountpoint reference counter (CVE-2020-12114)
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):
* RHEL8.3 - Include patch: powerpc/pci: Remove LSI mappings on device teardown (xive/pci) (BZ#1931925)
* RHEL8.2 - [P10][Denali] System crash during a perf sanity test (perf:) (BZ#1933995)
* [RHEL 8.1] AMD/EPYC nested guest virtualization L1 guest crash (BZ#1945404)
* [HPEMC 8.1 REGRESSION] skx_uncore: probe of 0008:80:08.0 failed with error -22 (BZ#1947114)
* iperf3 over geneve created on vlan would fail (BZ#1947979)
* [Azure][RHEL-8]Mellanox Patches To Prevent Kernel Hang In MLX4 (BZ#1952071)
* [HPEMC 8.4 REGRESSION]: perf/x86/intel/uncore kernel panic vulnerability on Haswell and Broadwell servers (BZ#1956685)

Topics%20covered

Topics Covered

security advisory Red Hat kernel update bug fix DoS RHEL escalation

References

https://access.redhat.com/security/cve/CVE-2020-0466 https://access.redhat.com/security/cve/CVE-2020-12114 https://access.redhat.com/security/cve/CVE-2020-12362 https://access.redhat.com/security/cve/CVE-2020-28374 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux BaseOS EUS (v. 8.2):
Source: kernel-4.18.0-193.56.1.el8_2.src.rpm
aarch64: bpftool-4.18.0-193.56.1.el8_2.aarch64.rpm bpftool-debuginfo-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-core-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-cross-headers-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-debug-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-debug-core-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-debug-debuginfo-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-debug-devel-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-debug-modules-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-debug-modules-extra-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-debuginfo-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-devel-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-headers-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-modules-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-modules-extra-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-tools-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-tools-debuginfo-4.18.0-193.56.1.el8_2.aarch64.rpm kernel-tools-libs-4.18.0-193.56.1.el8_2.aarch64.rpm perf-4.18.0-193.56.1.el8_2.aarch64.rpm perf-debuginfo-4.18.0-193.56.1.el8_2.aarch64.rpm python3-perf-4.18.0-193.56.1.el8_2.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:2185-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2185
Issue date: 2021-06-02

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 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 Red Hat kernel update bug fix DoS RHEL escalation

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

1848652 - CVE-2020-12114 kernel: DoS by corrupting mountpoint reference counter

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

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

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