Issued:: 2021-07-20
Updated:: 2021-07-20

RHSA-2021:2718 - Important: kernel security and bug fix update

Synopsis

Important: kernel security and bug fix update

Type/Severity

Security Advisory Important

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.2 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)
kernel: perf_event_parse_addr_filter memory (CVE-2020-25704)
kernel: security bypass in certs/blacklist.c and certs/system_keyring.c (CVE-2020-26541)
kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (CVE-2020-35508)

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):

RHEL8.2 Snapshot2 - tpm: ibmvtpm: Wait for buffer to be set before proceeding (BZ#1933986)
fnic crash from invalid request pointer (BZ#1961707)
[Azure][RHEL8.4] Two Patches Needed To Enable Azure Host Time-syncing in VMs (BZ#1963051)
RHEL kernel 8.2 and higher are affected by data corruption bug in raid1 arrays using bitmaps. (BZ#1969338)

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.

Affected Products

Product	Version	Arch
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions	8.2	x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support	8.2	x86_64
Red Hat Enterprise Linux for Power, little endian - Extended Update Support	8.2	ppc64le
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support	8.2	s390x
Red Hat Enterprise Linux for ARM 64 - Extended Update Support	8.2	aarch64
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions	8.2	ppc64le
Red Hat Enterprise Linux Server - TUS	8.2	x86_64
Red Hat Enterprise Linux Server - AUS	8.2	x86_64
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support	8.2	x86_64
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support	8.2	ppc64le
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support	8.2	aarch64

Updated Packages

bpftool-debuginfo-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-core-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-debug-4.18.0-193.60.2.el8_2.ppc64le.rpm
bpftool-debuginfo-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-debug-debuginfo-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-modules-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-modules-extra-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-tools-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-tools-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-core-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-tools-libs-devel-4.18.0-193.60.2.el8_2.aarch64.rpm
bpftool-debuginfo-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-modules-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-zfcpdump-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-cross-headers-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-zfcpdump-debuginfo-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-zfcpdump-modules-4.18.0-193.60.2.el8_2.s390x.rpm
python3-perf-debuginfo-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-debug-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-debug-modules-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-debug-debuginfo-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-tools-libs-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-debug-core-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-debug-modules-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-debuginfo-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-core-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-debuginfo-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-devel-4.18.0-193.60.2.el8_2.aarch64.rpm
perf-4.18.0-193.60.2.el8_2.aarch64.rpm
bpftool-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-debug-core-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-debuginfo-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-headers-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-tools-debuginfo-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-tools-libs-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-tools-libs-devel-4.18.0-193.60.2.el8_2.x86_64.rpm
perf-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-debuginfo-common-aarch64-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-modules-4.18.0-193.60.2.el8_2.aarch64.rpm
bpftool-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-devel-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-debug-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-debug-debuginfo-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-modules-extra-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-tools-debuginfo-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-debuginfo-common-x86_64-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-zfcpdump-core-4.18.0-193.60.2.el8_2.s390x.rpm
perf-4.18.0-193.60.2.el8_2.s390x.rpm
python3-perf-debuginfo-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-zfcpdump-devel-4.18.0-193.60.2.el8_2.s390x.rpm
python3-perf-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-debug-debuginfo-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-debug-devel-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-debug-devel-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-tools-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-debuginfo-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-zfcpdump-modules-extra-4.18.0-193.60.2.el8_2.s390x.rpm
perf-debuginfo-4.18.0-193.60.2.el8_2.s390x.rpm
python3-perf-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-tools-libs-devel-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-debug-modules-extra-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-headers-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-headers-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-abi-whitelists-4.18.0-193.60.2.el8_2.noarch.rpm
kernel-debuginfo-common-ppc64le-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-modules-extra-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-cross-headers-4.18.0-193.60.2.el8_2.s390x.rpm
bpftool-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-devel-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-debug-core-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-debug-modules-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-debug-modules-extra-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-debug-modules-extra-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-headers-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-tools-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-tools-debuginfo-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-tools-debuginfo-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-debug-core-4.18.0-193.60.2.el8_2.x86_64.rpm
bpftool-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-debug-devel-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-debug-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-debug-modules-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-tools-libs-4.18.0-193.60.2.el8_2.aarch64.rpm
perf-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-4.18.0-193.60.2.el8_2.src.rpm
perf-debuginfo-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-doc-4.18.0-193.60.2.el8_2.noarch.rpm
kernel-modules-4.18.0-193.60.2.el8_2.s390x.rpm
perf-debuginfo-4.18.0-193.60.2.el8_2.ppc64le.rpm
python3-perf-4.18.0-193.60.2.el8_2.ppc64le.rpm
python3-perf-4.18.0-193.60.2.el8_2.x86_64.rpm
python3-perf-debuginfo-4.18.0-193.60.2.el8_2.s390x.rpm
perf-debuginfo-4.18.0-193.60.2.el8_2.x86_64.rpm
python3-perf-debuginfo-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-modules-extra-4.18.0-193.60.2.el8_2.aarch64.rpm
kernel-debuginfo-common-s390x-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-cross-headers-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-core-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-debug-devel-4.18.0-193.60.2.el8_2.s390x.rpm
kernel-debug-modules-extra-4.18.0-193.60.2.el8_2.ppc64le.rpm
kernel-devel-4.18.0-193.60.2.el8_2.x86_64.rpm
kernel-cross-headers-4.18.0-193.60.2.el8_2.x86_64.rpm
bpftool-debuginfo-4.18.0-193.60.2.el8_2.aarch64.rpm

Fixes

CVEs

References

Additional information

The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.