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Alerts This Week
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Red Hat Enterprise Linux 7.7: Key Kernel Security Flaws RHSA-2020-3019-01

red hat
Calendar Grey July 21, 2020
Dist Redhat Esm H88
Critical security patches and enhancements for Red Hat Enterprise Linux 7.7 designated as High Priority, targeting significant threats.
An update for kernel is now available for Red Hat Enterprise Linux 7.7 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: vfio: access to disabled MMIO space of some devices may lead to DoS scenario (CVE-2020-12888)
* kernel: denial of service in arch/powerpc/kernel/signal_32.c and arch/powerpc/kernel/signal_64.c via sigreturn() system call (CVE-2019-13648)
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):
* kernel: hw: provide reporting and microcode mitigation toggle for CVE-2020-0543 / Special Register Buffer Data Sampling (SRBDS) (BZ#1840678)
* Deadlock condition grabbing ssb_state lock (BZ#1841120)
* ext4: change LRU to round-robin in extent status tree shrinker (BZ#1847342)
* Emulex lpfc seems to get hung up failing IOCB'S continuously on kernel 3.10.0-957.21.3.el7.x86_64 leading to Oracle evictions (BZ#1849650)
* After upgrade to 3.9.89 pod containers with CPU limits fail to start due to cgroup error (BZ#1850499)
Enhancement(s):
* [Marvell 7.8 FEAT] Update bnx2fc driver to latest upstream (BZ#1834817)

Topics%20covered

Topics Covered

security advisory denial of service red hat bug fix important kernel

References

https://access.redhat.com/security/cve/CVE-2019-13648 https://access.redhat.com/security/cve/CVE-2020-12888 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/solutions/5142691

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.7):
Source: kernel-3.10.0-1062.30.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1062.30.1.el7.noarch.rpm kernel-doc-3.10.0-1062.30.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-1062.30.1.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1062.30.1.el7.x86_64.rpm kernel-3.10.0-1062.30.1.el7.x86_64.rpm kernel-debug-3.10.0-1062.30.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.30.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-1062.30.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.30.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1062.30.1.el7.x86_64.rpm kernel-devel-3.10.0-1062.30.1.el7.x86_64.rpm kernel-headers-3.10.0-1062.30.1.el7.x86_64.rpm kernel-tools-3.10.0-1062.30.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1062.30.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-1062.30.1.el7.x86_64.rpm perf-3.10.0-1062.30.1.el7.x86_64.rpm perf-debuginfo-3.10.0-1062.30.1.el7.x86_64.rpm python-perf-3.10.0-1062.30.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1062.30.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7):
x86_64: bpftool-debuginfo-3.10.0-1062.30.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.30.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.30.1.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:3019-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3019
Issue date: 2020-07-21

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.7Extended 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 denial of service red hat bug fix important kernel

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.7) - ppc64, ppc64le, x86_64

Bugs Fixed

1735630 - CVE-2019-13648 kernel: denial of service in arch/powerpc/kernel/signal_32.c and arch/powerpc/kernel/signal_64.c via sigreturn() system call

1836244 - CVE-2020-12888 Kernel: vfio: access to disabled MMIO space of some devices may lead to DoS scenario

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