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====================================================================                   Red Hat Security Advisory

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2022:1324-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2022:1324
Issue date:        2022-04-12
CVE Names:         CVE-2021-0920 CVE-2021-4028 CVE-2021-4083 
                   CVE-2022-22942 
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.7
Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended Update
Support, and Red Hat Enterprise Linux 7.7 Update Services for SAP
Solutions.

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server AUS (v. 7.7) - noarch, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.7) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.7) - x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.7) - ppc64le, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.7) - x86_64
Red Hat Enterprise Linux Server TUS (v. 7.7) - noarch, x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security Fix(es):

* kernel: Use After Free in unix_gc() which could result in a local
privilege escalation (CVE-2021-0920)

* 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)

* kernel: failing usercopy allows for use-after-free exploitation
(CVE-2022-22942)

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):

* guest using rtl8139 can not connect to network (BZ#2063889)

4. 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.

5. Bugs fixed (https://bugzilla.redhat.com/):

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
2031930 - CVE-2021-0920 kernel: Use After Free in unix_gc() which could result in a local privilege escalation
2044809 - CVE-2022-22942 kernel: failing usercopy allows for use-after-free exploitation

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 7.7):

Source:
kernel-3.10.0-1062.66.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1062.66.1.el7.noarch.rpm
kernel-doc-3.10.0-1062.66.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-1062.66.1.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debug-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-devel-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-headers-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1062.66.1.el7.x86_64.rpm
perf-3.10.0-1062.66.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
python-perf-3.10.0-1062.66.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.7):

Source:
kernel-3.10.0-1062.66.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1062.66.1.el7.noarch.rpm
kernel-doc-3.10.0-1062.66.1.el7.noarch.rpm

ppc64le:
bpftool-3.10.0-1062.66.1.el7.ppc64le.rpm
bpftool-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-debug-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-devel-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-headers-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-tools-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-1062.66.1.el7.ppc64le.rpm
perf-3.10.0-1062.66.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm
python-perf-3.10.0-1062.66.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm

x86_64:
bpftool-3.10.0-1062.66.1.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debug-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-devel-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-headers-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1062.66.1.el7.x86_64.rpm
perf-3.10.0-1062.66.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
python-perf-3.10.0-1062.66.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 7.7):

Source:
kernel-3.10.0-1062.66.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-1062.66.1.el7.noarch.rpm
kernel-doc-3.10.0-1062.66.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-1062.66.1.el7.x86_64.rpm
bpftool-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debug-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-devel-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-headers-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-1062.66.1.el7.x86_64.rpm
perf-3.10.0-1062.66.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
python-perf-3.10.0-1062.66.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.7):

x86_64:
bpftool-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1062.66.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional E4S (v. 7.7):

ppc64le:
bpftool-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-1062.66.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm

x86_64:
bpftool-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1062.66.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 7.7):

x86_64:
bpftool-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-1062.66.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2021-0920
https://access.redhat.com/security/cve/CVE-2021-4028
https://access.redhat.com/security/cve/CVE-2021-4083
https://access.redhat.com/security/cve/CVE-2022-22942
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2022 Red Hat, Inc.
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RedHat: RHSA-2022-1324:01 Important: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended Update Support, and Red Hat Enterprise L...

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)
* 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)
* kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)
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):
* guest using rtl8139 can not connect to network (BZ#2063889)



Summary


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.

References

https://access.redhat.com/security/cve/CVE-2021-0920 https://access.redhat.com/security/cve/CVE-2021-4028 https://access.redhat.com/security/cve/CVE-2021-4083 https://access.redhat.com/security/cve/CVE-2022-22942 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Server AUS (v. 7.7):
Source: kernel-3.10.0-1062.66.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1062.66.1.el7.noarch.rpm kernel-doc-3.10.0-1062.66.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-1062.66.1.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debug-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1062.66.1.el7.x86_64.rpm kernel-devel-3.10.0-1062.66.1.el7.x86_64.rpm kernel-headers-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-1062.66.1.el7.x86_64.rpm perf-3.10.0-1062.66.1.el7.x86_64.rpm perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm python-perf-3.10.0-1062.66.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.7):
Source: kernel-3.10.0-1062.66.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1062.66.1.el7.noarch.rpm kernel-doc-3.10.0-1062.66.1.el7.noarch.rpm
ppc64le: bpftool-3.10.0-1062.66.1.el7.ppc64le.rpm bpftool-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-debug-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-devel-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-headers-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-tools-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-tools-libs-3.10.0-1062.66.1.el7.ppc64le.rpm perf-3.10.0-1062.66.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm python-perf-3.10.0-1062.66.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm
x86_64: bpftool-3.10.0-1062.66.1.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debug-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1062.66.1.el7.x86_64.rpm kernel-devel-3.10.0-1062.66.1.el7.x86_64.rpm kernel-headers-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-1062.66.1.el7.x86_64.rpm perf-3.10.0-1062.66.1.el7.x86_64.rpm perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm python-perf-3.10.0-1062.66.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server TUS (v. 7.7):
Source: kernel-3.10.0-1062.66.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-1062.66.1.el7.noarch.rpm kernel-doc-3.10.0-1062.66.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-1062.66.1.el7.x86_64.rpm bpftool-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debug-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1062.66.1.el7.x86_64.rpm kernel-devel-3.10.0-1062.66.1.el7.x86_64.rpm kernel-headers-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-1062.66.1.el7.x86_64.rpm perf-3.10.0-1062.66.1.el7.x86_64.rpm perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm python-perf-3.10.0-1062.66.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.7):
x86_64: bpftool-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-1062.66.1.el7.x86_64.rpm perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional E4S (v. 7.7):
ppc64le: bpftool-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-debug-devel-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-1062.66.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-1062.66.1.el7.ppc64le.rpm
x86_64: bpftool-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-1062.66.1.el7.x86_64.rpm perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional TUS (v. 7.7):
x86_64: bpftool-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-1062.66.1.el7.x86_64.rpm perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-1062.66.1.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/


Severity
Advisory ID: RHSA-2022:1324-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:1324
Issued Date: : 2022-04-12
CVE Names: CVE-2021-0920 CVE-2021-4028 CVE-2021-4083 CVE-2022-22942

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.7Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.7 Update Services for SAPSolutions.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.


Topic


 

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.7) - noarch, x86_64

Red Hat Enterprise Linux Server E4S (v. 7.7) - noarch, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.7) - x86_64

Red Hat Enterprise Linux Server Optional E4S (v. 7.7) - ppc64le, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.7) - x86_64

Red Hat Enterprise Linux Server TUS (v. 7.7) - noarch, 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

2031930 - CVE-2021-0920 kernel: Use After Free in unix_gc() which could result in a local privilege escalation

2044809 - CVE-2022-22942 kernel: failing usercopy allows for use-after-free exploitation


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