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Red Hat Enterprise Linux 7 RHSA-2021-1071 Important Kernel Security Update

red hat
Calendar Grey April 6, 2021
Dist Redhat Esm H88
A crucial kernel update addresses significant vulnerabilities in Red Hat Enterprise Linux 7. Ensure your security by applying the update promptly.
An update for kernel is now available for Red Hat Enterprise Linux 7

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: out-of-bounds read in libiscsi module (CVE-2021-27364)
* kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)
* 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):
* Customer testing eMMC sees and intermittent boot problem on 7.8+, was not seen on 7.3 (BZ#1918916)
* tcm loopback driver causes double-start of scsi command when work is delayed (BZ#1925652)
* [Azure][RHEL-7]Mellanox Patches To Prevent Kernel Hang In MLX4 (BZ#1925691)
* A patch from upstream c365c292d059 causes us to end up leaving rt_nr_boosted in an inconsistent state, which causes a hard lockup. (BZ#1928082)
* [RHEL7.9.z] Add fix to update snd_wl1 in bulk receiver fast path (BZ#1929804)

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow bug fix kernel patch important heap overflow kernel red hat enterprise linux important update out-of-bounds memory out-of-bounds read

References

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 Client (v. 7):
Source: kernel-3.10.0-1160.24.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1160.24.1.el7.noarch.rpm kernel-doc-3.10.0-1160.24.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-1160.24.1.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm kernel-3.10.0-1160.24.1.el7.x86_64.rpm kernel-debug-3.10.0-1160.24.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-1160.24.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.24.1.el7.x86_64.rpm kernel-devel-3.10.0-1160.24.1.el7.x86_64.rpm kernel-headers-3.10.0-1160.24.1.el7.x86_64.rpm kernel-tools-3.10.0-1160.24.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-1160.24.1.el7.x86_64.rpm perf-3.10.0-1160.24.1.el7.x86_64.rpm perf-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm python-perf-3.10.0-1160.24.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: bpftool-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.24.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.24.1.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:1071-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1071
Issue date: 2021-04-06

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.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 Red Hat buffer overflow bug fix kernel patch important heap overflow kernel red hat enterprise linux important update out-of-bounds memory out-of-bounds read

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

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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