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Red Hat 7.7 RHSA-2021-0526-01 Moderate: Kernel Bug Fix & Security Issues

red hat
Calendar Grey February 16, 2021
Dist Redhat Esm H88
Ubuntu's recent kernel patch tackles significant security vulnerabilities, delivering essential enhancements and repairs for LTS environments.
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: umask not applied on filesystem without ACL support (CVE-2020-24394)
* kernel: TOCTOU mismatch in the NFS client code (CVE-2020-25212)
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):
* Security patch for CVE-2020-25212 breaks directory listings via 'ls' on NFS V4.2 shares mounted with selinux enabled labels (BZ#1919145)
* Panic in semctl_nolock.constprop.15+0x25b (BZ#1919307)

Topics%20covered

Topics Covered

security advisory moderate security issue kernel update bug fix security fix Red Hat Enterprise Linux moderate severity kernel security impact NFS client

References

https://access.redhat.com/security/cve/CVE-2020-24394 https://access.redhat.com/security/cve/CVE-2020-25212 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.7):
Source: kernel-3.10.0-1062.45.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1062.45.1.el7.noarch.rpm kernel-doc-3.10.0-1062.45.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-1062.45.1.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1062.45.1.el7.x86_64.rpm kernel-3.10.0-1062.45.1.el7.x86_64.rpm kernel-debug-3.10.0-1062.45.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.45.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-1062.45.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.45.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1062.45.1.el7.x86_64.rpm kernel-devel-3.10.0-1062.45.1.el7.x86_64.rpm kernel-headers-3.10.0-1062.45.1.el7.x86_64.rpm kernel-tools-3.10.0-1062.45.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1062.45.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-1062.45.1.el7.x86_64.rpm perf-3.10.0-1062.45.1.el7.x86_64.rpm perf-debuginfo-3.10.0-1062.45.1.el7.x86_64.rpm python-perf-3.10.0-1062.45.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1062.45.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7):
x86_64: bpftool-debuginfo-3.10.0-1062.45.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.45.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.45.1.el7.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:0526-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0526
Issue date: 2021-02-16

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 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 kernel update bug fix security fix Red Hat Enterprise Linux moderate severity kernel security impact NFS client

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

1869141 - CVE-2020-24394 kernel: umask not applied on filesystem without ACL support

1877575 - CVE-2020-25212 kernel: TOCTOU mismatch in the NFS client code

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