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Red Hat 7: RHSA-2022-1198-01 Important Kernel Security Update

red hat
Calendar Grey April 5, 2022
Dist Redhat Esm H88
Keep informed about the most recent kernel security patches and bug resolution updates for Red Hat Enterprise Linux 7, highlighting essential improvements.
An update for kernel is now available for Red Hat Enterprise Linux 7

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.

Summary

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)

Topics%20covered

Topics Covered

security advisory Red Hat bug fix kernel fix important update use-after-free fget check

References

https://access.redhat.com/security/cve/CVE-2021-4028 https://access.redhat.com/security/cve/CVE-2021-4083 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: kernel-3.10.0-1160.62.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1160.62.1.el7.noarch.rpm kernel-doc-3.10.0-1160.62.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-1160.62.1.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm kernel-3.10.0-1160.62.1.el7.x86_64.rpm kernel-debug-3.10.0-1160.62.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-1160.62.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.62.1.el7.x86_64.rpm kernel-devel-3.10.0-1160.62.1.el7.x86_64.rpm kernel-headers-3.10.0-1160.62.1.el7.x86_64.rpm kernel-tools-3.10.0-1160.62.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-1160.62.1.el7.x86_64.rpm perf-3.10.0-1160.62.1.el7.x86_64.rpm perf-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm python-perf-3.10.0-1160.62.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: bpftool-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1160.62.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1160.62.1.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:1198-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:1198
Issue date: 2022-04-05

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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix kernel fix important update use-after-free fget check

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

2027201 - CVE-2021-4028 kernel: use-after-free in RDMA listen()

2029923 - CVE-2021-4083 kernel: fget: check that the fd still exists after getting a ref to it

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