Issued:

2022-04-05

Updated:

2022-04-05

RHSA-2022:1198 - 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 7.

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 in RDMA listen() (CVE-2021-4028)

• kernel: fget: check that the fd still exists after getting a ref to it (CVE-2021-4083)

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):

• Adding new kernel entry in grub configuration file only after generation of new initramfs (BZ#1893756)

• Cannot mount DFS shares on RHEL7 (BZ#1937304)

• RHEL7.9 - zcrypt DD: Toleration for new IBM Z Crypto Hardware (BZ#1997156)

• kernel panic at skb_free_datagram_locked on 3.10.0-1160.45.1.el7 (BZ#2028740)

• Lots of tasks are getting stuck in I/O wait waiting on the buffer_head locked by the task that is busy shrinking slab for freeing pages - 3 patches to fs/buffer.c (BZ#2030609)

• [RHEL 7.9 Bug] x86/platform/uv: Add more to secondary CPU kdump info (BZ#2042462)

• REGRESSION System panicking in __kmalloc+0x94 from a freelist issue introduced by a block patch. (BZ#2054743)

Enhancement(s):

• RHEL7.9 - kernel: Add support for CPU-MF counter second version 7 (BZ#2048920)

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-devel-3.10.0-1160.62.1.el7.ppc64.rpm
• kernel-debug-3.10.0-1160.62.1.el7.ppc64.rpm
• kernel-headers-3.10.0-1160.62.1.el7.ppc64.rpm
• bpftool-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-3.10.0-1160.62.1.el7.ppc64le.rpm
• python-perf-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-debug-debuginfo-3.10.0-1160.62.1.el7.ppc64.rpm
• kernel-headers-3.10.0-1160.62.1.el7.ppc64le.rpm
• kernel-tools-libs-devel-3.10.0-1160.62.1.el7.ppc64.rpm
• kernel-debuginfo-common-x86_64-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-tools-libs-devel-3.10.0-1160.62.1.el7.ppc64le.rpm
• python-perf-3.10.0-1160.62.1.el7.s390x.rpm
• kernel-devel-3.10.0-1160.62.1.el7.ppc64.rpm
• kernel-debug-devel-3.10.0-1160.62.1.el7.s390x.rpm
• bpftool-debuginfo-3.10.0-1160.62.1.el7.s390x.rpm
• kernel-debuginfo-3.10.0-1160.62.1.el7.ppc64.rpm
• kernel-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-doc-3.10.0-1160.62.1.el7.noarch.rpm
• kernel-debug-debuginfo-3.10.0-1160.62.1.el7.s390x.rpm
• kernel-3.10.0-1160.62.1.el7.ppc64.rpm
• kernel-tools-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-debug-3.10.0-1160.62.1.el7.ppc64le.rpm
• kernel-tools-debuginfo-3.10.0-1160.62.1.el7.ppc64le.rpm
• perf-3.10.0-1160.62.1.el7.s390x.rpm
• kernel-tools-3.10.0-1160.62.1.el7.ppc64.rpm
• kernel-tools-libs-3.10.0-1160.62.1.el7.ppc64le.rpm
• kernel-kdump-3.10.0-1160.62.1.el7.s390x.rpm
• perf-debuginfo-3.10.0-1160.62.1.el7.ppc64.rpm
• python-perf-debuginfo-3.10.0-1160.62.1.el7.ppc64.rpm
• python-perf-debuginfo-3.10.0-1160.62.1.el7.s390x.rpm
• bpftool-debuginfo-3.10.0-1160.62.1.el7.ppc64le.rpm
• kernel-headers-3.10.0-1160.62.1.el7.s390x.rpm
• kernel-kdump-devel-3.10.0-1160.62.1.el7.s390x.rpm
• kernel-devel-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-kdump-debuginfo-3.10.0-1160.62.1.el7.s390x.rpm
• kernel-debuginfo-common-ppc64-3.10.0-1160.62.1.el7.ppc64.rpm
• kernel-headers-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-3.10.0-1160.62.1.el7.s390x.rpm
• kernel-bootwrapper-3.10.0-1160.62.1.el7.ppc64le.rpm
• kernel-tools-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-tools-libs-3.10.0-1160.62.1.el7.ppc64.rpm
• python-perf-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-devel-3.10.0-1160.62.1.el7.s390x.rpm
• kernel-debug-3.10.0-1160.62.1.el7.s390x.rpm
• python-perf-debuginfo-3.10.0-1160.62.1.el7.ppc64le.rpm
• bpftool-3.10.0-1160.62.1.el7.ppc64le.rpm
• kernel-abi-whitelists-3.10.0-1160.62.1.el7.noarch.rpm
• kernel-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-bootwrapper-3.10.0-1160.62.1.el7.ppc64.rpm
• kernel-tools-debuginfo-3.10.0-1160.62.1.el7.ppc64.rpm
• perf-3.10.0-1160.62.1.el7.ppc64.rpm
• kernel-debuginfo-3.10.0-1160.62.1.el7.s390x.rpm
• kernel-tools-libs-3.10.0-1160.62.1.el7.x86_64.rpm
• python-perf-3.10.0-1160.62.1.el7.ppc64.rpm
• bpftool-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm
• python-perf-3.10.0-1160.62.1.el7.ppc64le.rpm
• kernel-tools-3.10.0-1160.62.1.el7.ppc64le.rpm
• kernel-debuginfo-common-s390x-3.10.0-1160.62.1.el7.s390x.rpm
• kernel-debug-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-3.10.0-1160.62.1.el7.src.rpm
• bpftool-3.10.0-1160.62.1.el7.s390x.rpm
• kernel-debuginfo-common-ppc64le-3.10.0-1160.62.1.el7.ppc64le.rpm
• kernel-debug-devel-3.10.0-1160.62.1.el7.ppc64le.rpm
• kernel-devel-3.10.0-1160.62.1.el7.ppc64le.rpm
• kernel-debug-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-debuginfo-3.10.0-1160.62.1.el7.ppc64le.rpm
• kernel-debug-devel-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-tools-libs-devel-3.10.0-1160.62.1.el7.x86_64.rpm
• bpftool-debuginfo-3.10.0-1160.62.1.el7.ppc64.rpm
• perf-debuginfo-3.10.0-1160.62.1.el7.s390x.rpm
• perf-3.10.0-1160.62.1.el7.x86_64.rpm
• kernel-debug-debuginfo-3.10.0-1160.62.1.el7.ppc64le.rpm
• perf-debuginfo-3.10.0-1160.62.1.el7.ppc64le.rpm
• bpftool-3.10.0-1160.62.1.el7.ppc64.rpm
• perf-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm
• perf-3.10.0-1160.62.1.el7.ppc64le.rpm

Fixes

• This content is not included.BZ - 2027201
• This content is not included.BZ - 2029923

CVEs

• CVE-2021-4028
• CVE-2021-4083

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.