Issued:

2021-09-07

Updated:

2021-09-07

RHSA-2021:3447 - 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.

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: powerpc: KVM guest OS users can cause host OS memory corruption (CVE-2021-37576)

• kernel: slab-out-of-bounds access in xdr_set_page_base() in net/sunrpc/xdr.c (CVE-2021-38201)

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):

• Update Broadcom Emulex lpfc driver for RHEL8.5 with bug fixes (BZ#1948608)

• cyclictest shows >50us latency when guest enters idle (RT guest with 18 RT vCPUs) (BZ#1981336)

• xfrm: backports from upstream (BZ#1981840)

• A task is stuck waiting for the completion of the vmci_resouce releasing upon the balloon reset. (BZ#1982042)

• [mlx5] backport driver bits of net: zero-initialize tc skb extension on allocation (BZ#1982220)

• Kernel cannot kill a process doing compaction for hugepage allocation (BZ#1984085)

• RHEL8.4 Nightly[0108] - [P10] [Regression] Kdump failed on RHEL8.4 on SAN disk via flavafish adapter (qla2xxx/HPT/Radix) (BZ#1986156)

• [RHEL8.5] scheduler updates and fixes (BZ#1987296)

• RHEL 8.3 using FCOE via a FastLinQ QL45000 card will not manually scan in LUN from Target_id's over 8 (BZ#1989097)

• fixes for oopses in security mitigation runtime code patching (BZ#1989174)

• act mirred doesn't scrub packets when sending them to ingress (BZ#1992226)

• HPE: Cannot install 8.4 using the DVD presented to the iLO (BZ#1993894)

• NFS client hangs on share listing when server side readdir verifiers are implemented (BZ#1993895)

• SNO: The load is extremely high (~870) when pao is added and a profile is applied. (BZ#1994879)

• timeout value of conntrack entry with TCP ESTABLISHED status is too short (BZ#1995554)

• Increase the default value for flowtable offload timeouts (BZ#1995555)

• ice/iavf driver stop responding (BZ#1997534)

• [FJ8.4 Bug]: [REG] Some files in /proc/sys/user show wrong data (BZ#1998002)

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-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-devel-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-debug-core-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-debug-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-debuginfo-common-ppc64le-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-devel-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-modules-extra-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-cross-headers-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-tools-4.18.0-305.17.1.el8_4.ppc64le.rpm
• python3-perf-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-debug-modules-extra-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-tools-libs-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-debuginfo-common-aarch64-4.18.0-305.17.1.el8_4.aarch64.rpm
• perf-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-debuginfo-common-s390x-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-4.18.0-305.17.1.el8_4.s390x.rpm
• bpftool-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-debug-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-debug-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-4.18.0-305.17.1.el8_4.aarch64.rpm
• bpftool-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-headers-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-modules-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-zfcpdump-devel-4.18.0-305.17.1.el8_4.s390x.rpm
• python3-perf-4.18.0-305.17.1.el8_4.ppc64le.rpm
• python3-perf-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-tools-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-modules-extra-4.18.0-305.17.1.el8_4.s390x.rpm
• bpftool-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-tools-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
• perf-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
• python3-perf-4.18.0-305.17.1.el8_4.s390x.rpm
• bpftool-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
• bpftool-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-cross-headers-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-debug-modules-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-debug-modules-extra-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-devel-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-modules-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-tools-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-tools-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-tools-libs-devel-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-tools-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-doc-4.18.0-305.17.1.el8_4.noarch.rpm
• kernel-debug-core-4.18.0-305.17.1.el8_4.ppc64le.rpm
• perf-4.18.0-305.17.1.el8_4.aarch64.rpm
• perf-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-modules-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-zfcpdump-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-abi-stablelists-4.18.0-305.17.1.el8_4.noarch.rpm
• bpftool-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-debug-devel-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-modules-extra-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-tools-libs-devel-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-debug-modules-4.18.0-305.17.1.el8_4.ppc64le.rpm
• perf-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-debug-modules-4.18.0-305.17.1.el8_4.aarch64.rpm
• python3-perf-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-zfcpdump-modules-extra-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-debug-devel-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-debug-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-core-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-headers-4.18.0-305.17.1.el8_4.s390x.rpm
• python3-perf-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-debug-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-modules-extra-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-modules-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-cross-headers-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-zfcpdump-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-tools-libs-devel-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-tools-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-headers-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-debug-core-4.18.0-305.17.1.el8_4.aarch64.rpm
• bpftool-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-debug-devel-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-zfcpdump-modules-4.18.0-305.17.1.el8_4.s390x.rpm
• python3-perf-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-debug-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-tools-libs-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-zfcpdump-core-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-tools-debuginfo-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-cross-headers-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-debug-modules-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-core-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-debug-modules-extra-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-debug-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-core-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-debuginfo-4.18.0-305.17.1.el8_4.s390x.rpm
• perf-debuginfo-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-debug-devel-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-devel-4.18.0-305.17.1.el8_4.s390x.rpm
• bpftool-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-debug-modules-extra-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-core-4.18.0-305.17.1.el8_4.ppc64le.rpm
• kernel-tools-libs-4.18.0-305.17.1.el8_4.aarch64.rpm
• kernel-debuginfo-common-x86_64-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-headers-4.18.0-305.17.1.el8_4.x86_64.rpm
• perf-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm
• kernel-4.18.0-305.17.1.el8_4.src.rpm
• perf-4.18.0-305.17.1.el8_4.s390x.rpm
• kernel-debug-core-4.18.0-305.17.1.el8_4.x86_64.rpm
• python3-perf-debuginfo-4.18.0-305.17.1.el8_4.x86_64.rpm

Fixes

• This content is not included.BZ - 1986506
• This content is not included.BZ - 1992731

CVEs

• CVE-2021-37576
• CVE-2021-38201

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.