Issued:

2021-04-20

Updated:

2021-04-20

RHSA-2021:1272 - 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 8.2 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: Use after free via PI futex state (CVE-2021-3347)

• kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)

• kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)

• kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363)

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):

• System Crash / Core dump while deleting VMs (BZ#1897687)

• various patches to stabilize the OPAL error log processing and the powernv dump processing (ESS) (BZ#1907302)

• Unable to receive the signal registered using mq_notify(). (BZ#1926111)

• SCTP "Address already in use" when no active endpoints from RHEL 8.2 onwards (BZ#1927522)

• enable CONFIG_RANDOM_TRUST_CPU (BZ#1928027)

• [mm] mm, oom: remove oom_lock from oom_reaper (BZ#1929739)

• Configuring the system with non-RT kernel will hang the system (BZ#1930737)

• fNIC driver needs a patch fix that addresses crash (BZ#1932460)

• OVS mistakenly using local IP as tun_dst for VXLAN packets (?) (BZ#1944670)

Enhancement(s):

• mlx5: Hairpin Support in Switch Mode (BZ#1924690)

• Trace mode enablement in IMC to facilitate perf-kvm support (perf:) (BZ#1929696)

• ice: Enable Flow Director Support (BZ#1930780)

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-debuginfo-common-aarch64-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-debug-core-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-tools-4.18.0-193.51.1.el8_2.aarch64.rpm
• python3-perf-debuginfo-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-tools-debuginfo-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-core-4.18.0-193.51.1.el8_2.x86_64.rpm
• python3-perf-debuginfo-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-debug-modules-extra-4.18.0-193.51.1.el8_2.x86_64.rpm
• bpftool-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-core-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-debug-debuginfo-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-debug-modules-extra-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-modules-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-modules-extra-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-debuginfo-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-tools-libs-devel-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-modules-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-cross-headers-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-headers-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-tools-4.18.0-193.51.1.el8_2.ppc64le.rpm
• python3-perf-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-debug-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-debug-debuginfo-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-debuginfo-common-ppc64le-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-tools-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-4.18.0-193.51.1.el8_2.src.rpm
• kernel-debug-core-4.18.0-193.51.1.el8_2.s390x.rpm
• bpftool-debuginfo-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-debug-core-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-cross-headers-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-debug-modules-extra-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-modules-extra-4.18.0-193.51.1.el8_2.ppc64le.rpm
• perf-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-tools-libs-4.18.0-193.51.1.el8_2.ppc64le.rpm
• bpftool-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-devel-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-debuginfo-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-devel-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-debug-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-zfcpdump-modules-extra-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-4.18.0-193.51.1.el8_2.x86_64.rpm
• perf-debuginfo-4.18.0-193.51.1.el8_2.aarch64.rpm
• perf-debuginfo-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-debug-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-doc-4.18.0-193.51.1.el8_2.noarch.rpm
• kernel-cross-headers-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-debug-devel-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-debug-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-core-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-headers-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-zfcpdump-devel-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-debug-debuginfo-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-tools-libs-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-tools-debuginfo-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-abi-whitelists-4.18.0-193.51.1.el8_2.noarch.rpm
• kernel-debuginfo-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-modules-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-debug-devel-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-debug-modules-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-tools-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-debug-modules-4.18.0-193.51.1.el8_2.aarch64.rpm
• bpftool-debuginfo-4.18.0-193.51.1.el8_2.ppc64le.rpm
• python3-perf-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-zfcpdump-modules-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-tools-debuginfo-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-debug-devel-4.18.0-193.51.1.el8_2.s390x.rpm
• bpftool-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-debug-core-4.18.0-193.51.1.el8_2.ppc64le.rpm
• bpftool-debuginfo-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-debuginfo-common-s390x-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-headers-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-tools-debuginfo-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-tools-libs-devel-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-debug-modules-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-tools-libs-devel-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-debug-modules-extra-4.18.0-193.51.1.el8_2.ppc64le.rpm
• perf-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-devel-4.18.0-193.51.1.el8_2.x86_64.rpm
• perf-debuginfo-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-headers-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-zfcpdump-core-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-devel-4.18.0-193.51.1.el8_2.ppc64le.rpm
• python3-perf-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-core-4.18.0-193.51.1.el8_2.ppc64le.rpm
• bpftool-debuginfo-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-cross-headers-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-debug-modules-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-debuginfo-common-x86_64-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-modules-extra-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-debuginfo-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-modules-4.18.0-193.51.1.el8_2.s390x.rpm
• python3-perf-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-zfcpdump-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-tools-libs-4.18.0-193.51.1.el8_2.x86_64.rpm
• kernel-4.18.0-193.51.1.el8_2.aarch64.rpm
• perf-4.18.0-193.51.1.el8_2.ppc64le.rpm
• bpftool-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-debug-devel-4.18.0-193.51.1.el8_2.aarch64.rpm
• kernel-zfcpdump-debuginfo-4.18.0-193.51.1.el8_2.s390x.rpm
• perf-4.18.0-193.51.1.el8_2.aarch64.rpm
• perf-debuginfo-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-debug-debuginfo-4.18.0-193.51.1.el8_2.s390x.rpm
• python3-perf-debuginfo-4.18.0-193.51.1.el8_2.ppc64le.rpm
• kernel-4.18.0-193.51.1.el8_2.s390x.rpm
• kernel-modules-extra-4.18.0-193.51.1.el8_2.s390x.rpm
• python3-perf-debuginfo-4.18.0-193.51.1.el8_2.s390x.rpm

Fixes

• This content is not included.BZ - 1922249
• This content is not included.BZ - 1930078
• This content is not included.BZ - 1930079
• This content is not included.BZ - 1930080

CVEs

• CVE-2021-3347
• CVE-2021-27363
• CVE-2021-27364
• CVE-2021-27365

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.