Issued:

2021-06-01

Updated:

2021-06-01

RHSA-2021:2168 - 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: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu->run (CVE-2021-3501)

• kernel: nitro_enclaves stale file descriptors on failed usercopy (CVE-2021-3543)

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):

• OVS mistakenly using local IP as tun_dst for VXLAN packets (?) (BZ#1944667)

• Selinux: The task calling security_set_bools() deadlocks with itself when it later calls selinux_audit_rule_match(). (BZ#1945123)

• [mlx5] tc flower mpls match options does not work (BZ#1952061)

• mlx5: missing patches for ct.rel (BZ#1952062)

• CT HWOL: with OVN/OVS, intermittently, load balancer hairpin TCP packets get dropped for seconds in a row (BZ#1952065)

• [Lenovo 8.3 bug] Blackscreen after clicking on "Settings" icon from top-right corner. (BZ#1952900)

• RHEL 8.x missing uio upstream fix. (BZ#1952952)

• Turbostat doesn't show any measured data on AMD Milan (BZ#1952987)

• P620 no sound from front headset jack (BZ#1954545)

• RHEL kernel 8.2 and higher are affected by data corruption bug in raid1 arrays using bitmaps. (BZ#1955188)

• [net/sched] connection failed with DNAT + SNAT by tc action ct (BZ#1956458)

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-cross-headers-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-tools-libs-devel-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-4.18.0-305.3.1.el8_4.src.rpm
• perf-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
• python3-perf-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-4.18.0-305.3.1.el8_4.ppc64le.rpm
• bpftool-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-devel-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-devel-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-debug-core-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-tools-libs-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-debug-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
• python3-perf-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-debug-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-zfcpdump-modules-extra-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-zfcpdump-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
• python3-perf-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-debug-modules-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-debuginfo-common-x86_64-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-modules-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-core-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-core-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-devel-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-debug-devel-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-tools-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-zfcpdump-modules-4.18.0-305.3.1.el8_4.s390x.rpm
• bpftool-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-tools-4.18.0-305.3.1.el8_4.aarch64.rpm
• bpftool-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-debug-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-debug-modules-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-debuginfo-common-aarch64-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-devel-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-headers-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-modules-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-debug-core-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-modules-extra-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-modules-extra-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-modules-extra-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-tools-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-headers-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-headers-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-tools-libs-4.18.0-305.3.1.el8_4.aarch64.rpm
• perf-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
• python3-perf-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
• perf-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-modules-4.18.0-305.3.1.el8_4.ppc64le.rpm
• python3-perf-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
• bpftool-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-abi-stablelists-4.18.0-305.3.1.el8_4.noarch.rpm
• kernel-core-4.18.0-305.3.1.el8_4.x86_64.rpm
• python3-perf-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-debug-modules-4.18.0-305.3.1.el8_4.s390x.rpm
• python3-perf-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-debug-modules-extra-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-debug-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-core-4.18.0-305.3.1.el8_4.ppc64le.rpm
• perf-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-debug-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-tools-4.18.0-305.3.1.el8_4.s390x.rpm
• perf-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
• bpftool-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
• bpftool-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-cross-headers-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-debug-modules-extra-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-tools-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-modules-extra-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-debug-devel-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-debuginfo-common-s390x-4.18.0-305.3.1.el8_4.s390x.rpm
• perf-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-tools-libs-devel-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
• python3-perf-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-zfcpdump-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-debug-core-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-debuginfo-common-ppc64le-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-tools-debuginfo-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-debug-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-debug-core-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-debug-modules-extra-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-headers-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-tools-libs-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-cross-headers-4.18.0-305.3.1.el8_4.ppc64le.rpm
• bpftool-debuginfo-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-cross-headers-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-doc-4.18.0-305.3.1.el8_4.noarch.rpm
• bpftool-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-debug-devel-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-debug-modules-extra-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-debug-4.18.0-305.3.1.el8_4.ppc64le.rpm
• kernel-modules-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-tools-debuginfo-4.18.0-305.3.1.el8_4.aarch64.rpm
• kernel-tools-libs-devel-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-debug-devel-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-tools-debuginfo-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-zfcpdump-devel-4.18.0-305.3.1.el8_4.s390x.rpm
• kernel-debug-modules-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-debug-4.18.0-305.3.1.el8_4.x86_64.rpm
• kernel-zfcpdump-core-4.18.0-305.3.1.el8_4.s390x.rpm
• perf-4.18.0-305.3.1.el8_4.s390x.rpm
• perf-4.18.0-305.3.1.el8_4.x86_64.rpm

Fixes

• This content is not included.BZ - 1950136
• This content is not included.BZ - 1953022

CVEs

• CVE-2021-3501
• CVE-2021-3543

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.