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Red Hat Enterprise Linux 7.7 RHSA-2021-3522-01 Critical Kernel Update

red hat
Calendar Grey September 14, 2021
Dist Redhat Esm H88
Essential kernel security patch addressing serious vulnerabilities for Red Hat Enterprise Linux 7.7. Due to the severity of the issues, a system reboot is mandatory.
An update for kernel is now available for Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 7.7 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: Use after free via PI futex state (CVE-2021-3347)
* kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c (CVE-2021-22555)
* kernel: race condition for removal of the HCI controller (CVE-2021-32399)
* kernel: use-after-free in n_tty_receive_buf_common function in drivers/tty/n_tty.c (CVE-2020-8648)
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):
* sysfs: cannot create duplicate filename '/class/mdio_bus/ixgbe-8100 (BZ#1972707)
* [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap [7.9.z] (BZ#1975158)
* SAN Switch rebooted and caused (?) OpenStack compute node to reboot (BZ#1984118)

Topics%20covered

Topics Covered

security advisory security issue critical bug fix Red Hat Enterprise Linux important kernel

References

https://access.redhat.com/security/cve/CVE-2020-8648 https://access.redhat.com/security/cve/CVE-2021-3347 https://access.redhat.com/security/cve/CVE-2021-22555 https://access.redhat.com/security/cve/CVE-2021-32399 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Server AUS (v. 7.7):
Source: kernel-3.10.0-1062.56.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1062.56.1.el7.noarch.rpm kernel-doc-3.10.0-1062.56.1.el7.noarch.rpm
ppc64: bpftool-3.10.0-1062.56.1.el7.ppc64.rpm bpftool-debuginfo-3.10.0-1062.56.1.el7.ppc64.rpm kernel-3.10.0-1062.56.1.el7.ppc64.rpm kernel-bootwrapper-3.10.0-1062.56.1.el7.ppc64.rpm kernel-debug-3.10.0-1062.56.1.el7.ppc64.rpm kernel-debug-debuginfo-3.10.0-1062.56.1.el7.ppc64.rpm kernel-debug-devel-3.10.0-1062.56.1.el7.ppc64.rpm kernel-debuginfo-3.10.0-1062.56.1.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-1062.56.1.el7.ppc64.rpm kernel-devel-3.10.0-1062.56.1.el7.ppc64.rpm kernel-headers-3.10.0-1062.56.1.el7.ppc64.rpm kernel-tools-3.10.0-1062.56.1.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-1062.56.1.el7.ppc64.rpm kernel-tools-libs-3.10.0-1062.56.1.el7.ppc64.rpm perf-3.10.0-1062.56.1.el7.ppc64.rpm perf-debuginfo-3.10.0-1062.56.1.el7.ppc64.rpm python-perf-3.10.0-1062.56.1.el7.ppc64.rpm python-perf-debuginfo-3.10.0-1062.56.1.el7.ppc64.rpm
ppc64le: bpftool-3.10.0-1062.56.1.el7.ppc64le.rpm bpftool-debuginfo-3.10.0-1062.56.1.el7.ppc64le.rpm kernel-3.10.0-1062.56.1.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-1062.56.1.el7.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:3522-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3522
Issue date: 2021-09-14

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.7Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.7 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 security issue critical bug fix Red Hat Enterprise Linux important kernel

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server E4S (v. 7.7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Server TUS (v. 7.7) - noarch, ppc64, ppc64le, s390x, x86_64

Bugs Fixed

1802559 - CVE-2020-8648 kernel: use-after-free in n_tty_receive_buf_common function in drivers/tty/n_tty.c

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

1970807 - CVE-2021-32399 kernel: race condition for removal of the HCI controller

1980101 - CVE-2021-22555 kernel: out-of-bounds write in xt_compat_target_from_user() in net/netfilter/x_tables.c

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