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Red Hat 7.6 Alert: RHSA-2021-1376-01 Kernel Update with Critical Patches

red hat
Calendar Grey April 27, 2021
Dist Redhat Esm H88
Red Hat 7.6 EUS Kernel patch designated as Critical encompasses security enhancements and problem resolutions. Uncover effects and remedies immediately.
An update for kernel is now available for Red Hat Enterprise Linux 7.6 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: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)
* kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)
* kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)
* kernel: use-after-free in fs/block_dev.c (CVE-2020-15436)
* kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363)
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):
* [infiniband] Backport Request to fix Multicast Sendonly joins (BZ#1937820)

Topics%20covered

Topics Covered

security advisory kernel update bug fix security fix Red Hat Enterprise Linux important system reboot

References

https://access.redhat.com/security/cve/CVE-2020-15436 https://access.redhat.com/security/cve/CVE-2020-28374 https://access.redhat.com/security/cve/CVE-2021-27363 https://access.redhat.com/security/cve/CVE-2021-27364 https://access.redhat.com/security/cve/CVE-2021-27365 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):
Source: kernel-3.10.0-957.72.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.72.1.el7.noarch.rpm kernel-doc-3.10.0-957.72.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.72.1.el7.x86_64.rpm kernel-3.10.0-957.72.1.el7.x86_64.rpm kernel-debug-3.10.0-957.72.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.72.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.72.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.72.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.72.1.el7.x86_64.rpm kernel-devel-3.10.0-957.72.1.el7.x86_64.rpm kernel-headers-3.10.0-957.72.1.el7.x86_64.rpm kernel-tools-3.10.0-957.72.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.72.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.72.1.el7.x86_64.rpm perf-3.10.0-957.72.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.72.1.el7.x86_64.rpm python-perf-3.10.0-957.72.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.72.1.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.72.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.72.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.72.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.72.1.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:1376-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1376
Issue date: 2021-04-27

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6Extended 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 kernel update bug fix security fix Red Hat Enterprise Linux important system reboot

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.6) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.6) - ppc64, ppc64le, x86_64

Bugs Fixed

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

1901168 - CVE-2020-15436 kernel: use-after-free in fs/block_dev.c

1930078 - CVE-2021-27365 kernel: heap buffer overflow in the iSCSI subsystem

1930079 - CVE-2021-27363 kernel: iscsi: unrestricted access to sessions and handles

1930080 - CVE-2021-27364 kernel: out-of-bounds read in libiscsi module

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