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Red Hat Enterprise Linux 8.1: RHSA-2020-2667 Important: Kernel Security Fix

red hat
Calendar Grey June 23, 2020
Dist Redhat Esm H88
Critical kernel patch released for Red Hat Enterprise Linux 8.1 to resolve significant vulnerabilities, including a serious race condition bug.
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 block/bfq-iosched.c related to bfq_idle_slice_timer_body (CVE-2020-12657)
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):
* [FJ8.2 Bug]: kernel: retrieving process core dump of the init process (PID 1) fails (BZ#1821377)
* Stand-alone CPU Linpack test reports bad residual on HPC Cluster node(s) while running RHEL 8 (BZ#1827618)
* missing version.h dependency for modpost may cause build to fail (BZ#1828228)
* RHEL8.2 Pre-Beta - net/ibmvnic: Fix typo in retry check (BZ#1828708)
* efi: kernel panic during ltp fs test - read_all -d /sys -q -r 10 (BZ#1829526)
* RHEL8.2 Beta - SMC-R connection with vlan-id fails (BZ#1830895)
* RHEL8.1 - RHEL8.1 kernel 4.18.0-147.3.1.el8.bz181950_test001.ppc64le+debug failed during LPM test (p8/p9):idahop08:LPM (vtpm) (BZ#1831663)
* s390/pci: fix bugs related to MIO instruction usage (BZ#1834690)
* RHEL8.2 Alpha - ISST-LTE:PowerVM: vNIC DLPAR crashes the LPAR (ibmvnic) (BZ#1836232)
* kernel: hw: provide reporting and microcode mitigation toggle for CVE-2020-0543 / Special Register Buffer Data Sampling (SRBDS) (BZ#1840685)
* [Hyper-V][RHEL8.2] Update netvsc driver (BZ#1842485)
* block layer: update to v5.3 (BZ#1842872)
* netfilter: backports from upstream (BZ#1845041)

Topics%20covered

Topics Covered

security advisory update red hat bug fix important kernel use-after-free

References

https://access.redhat.com/security/cve/CVE-2020-12657 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/solutions/5142691

Package List

Red Hat Enterprise Linux BaseOS EUS (v. 8.1):
Source: kernel-4.18.0-147.20.1.el8_1.src.rpm
aarch64: bpftool-4.18.0-147.20.1.el8_1.aarch64.rpm bpftool-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-core-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-cross-headers-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-debug-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-debug-core-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-debug-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-debug-devel-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-debug-modules-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-debug-modules-extra-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-debuginfo-common-aarch64-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-devel-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-headers-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-modules-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-modules-extra-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-tools-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-tools-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm kernel-tools-libs-4.18.0-147.20.1.el8_1.aarch64.rpm perf-4.18.0-147.20.1.el8_1.aarch64.rpm perf-debuginfo-4.18.0-147.20.1.el8_1.aarch64.rpm python3-perf-4.18.0-147.20.1.el8_1.aarch64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:2667-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:2667
Issue date: 2020-06-23

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 update red hat bug fix important kernel use-after-free

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

1832866 - CVE-2020-12657 kernel: use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body

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