Issued:

2021-11-15

Updated:

2021-11-15

RHSA-2021:4650 - Important: kernel security, bug fix, and enhancement update

Synopsis

Important: kernel security, bug fix, and enhancement update

Type/Severity

Security Advisory Important

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.4 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: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type (CVE-2021-43267)

• kernel: timer tree corruption leads to missing wakeup and system freeze (CVE-2021-20317)

• kernel: fuse: stall on CPU can occur because a retry loop continually finds the same bad inode (CVE-2021-28950)

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):

• Fix repeated xhci wake after suspend due to uncleared internal wake state (BZ#2003789)

• CephFS mount points return "permission denied" (BZ#2017099)

Enhancement(s):

• Update qla2xxx driver to latest upstream (BZ#2014150)

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

Updated Packages

• kernel-debug-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-tools-4.18.0-305.28.1.el8_4.aarch64.rpm
• bpftool-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-tools-libs-devel-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-modules-extra-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-tools-libs-devel-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-tools-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-modules-extra-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-debug-core-4.18.0-305.28.1.el8_4.ppc64le.rpm
• perf-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-debug-devel-4.18.0-305.28.1.el8_4.x86_64.rpm
• python3-perf-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-debug-modules-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-tools-libs-4.18.0-305.28.1.el8_4.aarch64.rpm
• python3-perf-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-debug-devel-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-abi-stablelists-4.18.0-305.28.1.el8_4.noarch.rpm
• kernel-debug-modules-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-debug-devel-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-debug-modules-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-debuginfo-common-x86_64-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-debug-modules-extra-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-tools-libs-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-zfcpdump-modules-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-tools-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
• bpftool-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-headers-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-cross-headers-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-cross-headers-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-modules-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-cross-headers-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-modules-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-tools-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-zfcpdump-devel-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-debug-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-zfcpdump-modules-extra-4.18.0-305.28.1.el8_4.s390x.rpm
• perf-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-debug-devel-4.18.0-305.28.1.el8_4.s390x.rpm
• python3-perf-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
• python3-perf-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-devel-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-devel-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-core-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-debug-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-debug-modules-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-debug-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-debug-modules-extra-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-debug-modules-extra-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-debug-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
• bpftool-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-debuginfo-common-aarch64-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-debuginfo-common-s390x-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-headers-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-modules-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-zfcpdump-core-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-debuginfo-common-ppc64le-4.18.0-305.28.1.el8_4.ppc64le.rpm
• perf-4.18.0-305.28.1.el8_4.s390x.rpm
• bpftool-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-devel-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-devel-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-debug-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-debug-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
• bpftool-4.18.0-305.28.1.el8_4.x86_64.rpm
• perf-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-core-4.18.0-305.28.1.el8_4.ppc64le.rpm
• perf-debuginfo-4.18.0-305.28.1.el8_4.aarch64.rpm
• perf-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
• python3-perf-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-debug-core-4.18.0-305.28.1.el8_4.aarch64.rpm
• python3-perf-4.18.0-305.28.1.el8_4.s390x.rpm
• bpftool-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-tools-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
• bpftool-4.18.0-305.28.1.el8_4.aarch64.rpm
• python3-perf-debuginfo-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-debug-core-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-tools-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-cross-headers-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-debug-modules-extra-4.18.0-305.28.1.el8_4.s390x.rpm
• bpftool-4.18.0-305.28.1.el8_4.s390x.rpm
• perf-debuginfo-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-doc-4.18.0-305.28.1.el8_4.noarch.rpm
• kernel-tools-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-modules-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-core-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-tools-libs-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-headers-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-tools-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-tools-libs-devel-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-zfcpdump-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-headers-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-zfcpdump-debuginfo-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-4.18.0-305.28.1.el8_4.src.rpm
• kernel-modules-extra-4.18.0-305.28.1.el8_4.x86_64.rpm
• kernel-core-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-debug-4.18.0-305.28.1.el8_4.ppc64le.rpm
• kernel-debug-core-4.18.0-305.28.1.el8_4.s390x.rpm
• kernel-modules-extra-4.18.0-305.28.1.el8_4.ppc64le.rpm
• perf-4.18.0-305.28.1.el8_4.ppc64le.rpm
• python3-perf-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-4.18.0-305.28.1.el8_4.aarch64.rpm
• kernel-4.18.0-305.28.1.el8_4.s390x.rpm

Fixes

• This content is not included.BZ - 1941762
• This content is not included.BZ - 2005258
• This content is not included.BZ - 2020362

CVEs

• CVE-2021-20317
• CVE-2021-28950
• CVE-2021-43267

References

• https://access.redhat.com/security/updates/classification/#important

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.