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Red Hat Enterprise Linux 7.4 RHSA-2021:2732-01 Important Kernel Update

red hat
Calendar Grey July 20, 2021
Dist Redhat Esm H88
The latest advisory from Debian highlights critical updates targeting significant vulnerabilities found in Ubuntu 18.04.
An update for kernel is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise L...

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: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)
* kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)
* kernel: Use after free via PI futex state (CVE-2021-3347)
* kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)
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.

Topics%20covered

Topics Covered

security advisory kernel update critical fix important Red Hat Enterprise system reboot CVE addressing

References

https://access.redhat.com/security/cve/CVE-2020-28374 https://access.redhat.com/security/cve/CVE-2021-3347 https://access.redhat.com/security/cve/CVE-2021-33034 https://access.redhat.com/security/cve/CVE-2021-33909 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/security/vulnerabilities/RHSB-2021-006

Package List

Red Hat Enterprise Linux Server AUS (v. 7.4):
Source: kernel-3.10.0-693.90.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-693.90.2.el7.noarch.rpm kernel-doc-3.10.0-693.90.2.el7.noarch.rpm
x86_64: kernel-3.10.0-693.90.2.el7.x86_64.rpm kernel-debug-3.10.0-693.90.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-693.90.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-693.90.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-693.90.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-693.90.2.el7.x86_64.rpm kernel-devel-3.10.0-693.90.2.el7.x86_64.rpm kernel-headers-3.10.0-693.90.2.el7.x86_64.rpm kernel-tools-3.10.0-693.90.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-693.90.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-693.90.2.el7.x86_64.rpm perf-3.10.0-693.90.2.el7.x86_64.rpm perf-debuginfo-3.10.0-693.90.2.el7.x86_64.rpm python-perf-3.10.0-693.90.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-693.90.2.el7.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.4):
Source: kernel-3.10.0-693.90.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-693.90.2.el7.noarch.rpm kernel-doc-3.10.0-693.90.2.el7.noarch.rpm
ppc64le: kernel-3.10.0-693.90.2.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-693.90.2.el7.ppc64le.rpm kernel-debug-3.10.0-693.90.2.el7.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:2732-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2732
Issue date: 2021-07-20

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.4Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.4 Update Services for SAPSolutions.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 critical fix important Red Hat Enterprise system reboot CVE addressing

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.4) - noarch, x86_64

Red Hat Enterprise Linux Server E4S (v. 7.4) - noarch, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64

Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - ppc64le, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - x86_64

Red Hat Enterprise Linux Server TUS (v. 7.4) - noarch, x86_64

Bugs Fixed

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

1922249 - CVE-2021-3347 kernel: Use after free via PI futex state

1961305 - CVE-2021-33034 kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan

1970273 - CVE-2021-33909 kernel: size_t-to-int conversion vulnerability in the filesystem layer

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