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Red Hat Enterprise Linux 7: RHSA-2021-3438 Moderate Kernel Security Fix

red hat
Calendar Grey September 7, 2021
Dist Redhat Esm H88
The latest kernel enhancement for Red Hat Enterprise Linux tackles a noteworthy security concern while introducing essential patches to improve overall system reliability.
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: use-after-free in route4_change() in net/sched/cls_route.c (CVE-2021-3715)
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):
* [RHEL 7.8][s390x][DASD]Crash in __list_del_entry, alias_pav_group list corrupt when running dasd_alias_remove_device() (BZ#1889418)
* EMBARGOED CVE-2021-3715 kernel: use-after-free in route4_change() in net/sched/cls_route.c (BZ#1992926)

Topics%20covered

Topics Covered

security advisory moderate update bug fix Red Hat Enterprise Linux kernel security impact

References

https://access.redhat.com/security/cve/CVE-2021-3715 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: kernel-3.10.0-1160.42.2.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1160.42.2.el7.noarch.rpm kernel-doc-3.10.0-1160.42.2.el7.noarch.rpm
x86_64: bpftool-3.10.0-1160.42.2.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1160.42.2.el7.x86_64.rpm kernel-3.10.0-1160.42.2.el7.x86_64.rpm kernel-debug-3.10.0-1160.42.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.42.2.el7.x86_64.rpm kernel-debug-devel-3.10.0-1160.42.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.42.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.42.2.el7.x86_64.rpm kernel-devel-3.10.0-1160.42.2.el7.x86_64.rpm kernel-headers-3.10.0-1160.42.2.el7.x86_64.rpm kernel-tools-3.10.0-1160.42.2.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1160.42.2.el7.x86_64.rpm kernel-tools-libs-3.10.0-1160.42.2.el7.x86_64.rpm perf-3.10.0-1160.42.2.el7.x86_64.rpm perf-debuginfo-3.10.0-1160.42.2.el7.x86_64.rpm python-perf-3.10.0-1160.42.2.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1160.42.2.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: bpftool-debuginfo-3.10.0-1160.42.2.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.42.2.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.42.2.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.42.2.el7.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:3438-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3438
Issue date: 2021-09-07

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 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 update bug fix Red Hat Enterprise Linux kernel security impact

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

1993988 - CVE-2021-3715 kernel: use-after-free in route4_change() in net/sched/cls_route.c

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