-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2021:4770-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:4770
Issue date:        2021-11-23
CVE Names:         CVE-2020-36385 
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.6
Advanced Update Support, Red Hat Enterprise Linux 7.6 Telco Extended Update
Support, and Red Hat Enterprise Linux 7.6 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. 7.6) - noarch, x86_64
Red Hat Enterprise Linux Server E4S (v. 7.6) - noarch, ppc64le, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 7.6) - x86_64
Red Hat Enterprise Linux Server Optional E4S (v. 7.6) - ppc64le, x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 7.6) - x86_64
Red Hat Enterprise Linux Server TUS (v. 7.6) - 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 drivers/infiniband/core/ucma.c ctx
use-after-free (CVE-2020-36385)

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):

* Bring in upstream serial kernel patch (BZ#2007936)

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/):

1974319 - CVE-2020-36385 kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 7.6):

Source:
kernel-3.10.0-957.86.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.86.1.el7.noarch.rpm
kernel-doc-3.10.0-957.86.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.86.1.el7.x86_64.rpm
kernel-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.86.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.86.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.86.1.el7.x86_64.rpm
perf-3.10.0-957.86.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
python-perf-3.10.0-957.86.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server E4S (v. 7.6):

Source:
kernel-3.10.0-957.86.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.86.1.el7.noarch.rpm
kernel-doc-3.10.0-957.86.1.el7.noarch.rpm

ppc64le:
kernel-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-debug-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-devel-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-headers-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-tools-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-957.86.1.el7.ppc64le.rpm
perf-3.10.0-957.86.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm
python-perf-3.10.0-957.86.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm

x86_64:
kernel-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.86.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.86.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.86.1.el7.x86_64.rpm
perf-3.10.0-957.86.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
python-perf-3.10.0-957.86.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 7.6):

Source:
kernel-3.10.0-957.86.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.86.1.el7.noarch.rpm
kernel-doc-3.10.0-957.86.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.86.1.el7.x86_64.rpm
kernel-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.86.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.86.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.86.1.el7.x86_64.rpm
perf-3.10.0-957.86.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
python-perf-3.10.0-957.86.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 7.6):

x86_64:
kernel-debug-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.86.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional E4S (v. 7.6):

ppc64le:
kernel-debug-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-957.86.1.el7.ppc64le.rpm
perf-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.86.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 7.6):

x86_64:
kernel-debug-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.86.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.86.1.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-2020-36385
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 2021 Red Hat, Inc.
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RHSA-announce@redhat.com
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RedHat: RHSA-2021-4770:03 Important: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7.6 Advanced Update Support, Red Hat Enterprise Linux 7.6 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 drivers/infiniband/core/ucma.c ctx use-after-free (CVE-2020-36385)
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):
* Bring in upstream serial kernel patch (BZ#2007936)



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-2020-36385 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Server AUS (v. 7.6):
Source: kernel-3.10.0-957.86.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.86.1.el7.noarch.rpm kernel-doc-3.10.0-957.86.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.86.1.el7.x86_64.rpm kernel-3.10.0-957.86.1.el7.x86_64.rpm kernel-debug-3.10.0-957.86.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.86.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.86.1.el7.x86_64.rpm kernel-devel-3.10.0-957.86.1.el7.x86_64.rpm kernel-headers-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.86.1.el7.x86_64.rpm perf-3.10.0-957.86.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm python-perf-3.10.0-957.86.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.6):
Source: kernel-3.10.0-957.86.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.86.1.el7.noarch.rpm kernel-doc-3.10.0-957.86.1.el7.noarch.rpm
ppc64le: kernel-3.10.0-957.86.1.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-957.86.1.el7.ppc64le.rpm kernel-debug-3.10.0-957.86.1.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-957.86.1.el7.ppc64le.rpm kernel-devel-3.10.0-957.86.1.el7.ppc64le.rpm kernel-headers-3.10.0-957.86.1.el7.ppc64le.rpm kernel-tools-3.10.0-957.86.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm kernel-tools-libs-3.10.0-957.86.1.el7.ppc64le.rpm perf-3.10.0-957.86.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm python-perf-3.10.0-957.86.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm
x86_64: kernel-3.10.0-957.86.1.el7.x86_64.rpm kernel-debug-3.10.0-957.86.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.86.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.86.1.el7.x86_64.rpm kernel-devel-3.10.0-957.86.1.el7.x86_64.rpm kernel-headers-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.86.1.el7.x86_64.rpm perf-3.10.0-957.86.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm python-perf-3.10.0-957.86.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server TUS (v. 7.6):
Source: kernel-3.10.0-957.86.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.86.1.el7.noarch.rpm kernel-doc-3.10.0-957.86.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.86.1.el7.x86_64.rpm kernel-3.10.0-957.86.1.el7.x86_64.rpm kernel-debug-3.10.0-957.86.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.86.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.86.1.el7.x86_64.rpm kernel-devel-3.10.0-957.86.1.el7.x86_64.rpm kernel-headers-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.86.1.el7.x86_64.rpm perf-3.10.0-957.86.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm python-perf-3.10.0-957.86.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.86.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional E4S (v. 7.6):
ppc64le: kernel-debug-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm kernel-debug-devel-3.10.0-957.86.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-957.86.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-957.86.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-957.86.1.el7.ppc64le.rpm
x86_64: kernel-debug-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.86.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional TUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.86.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.86.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.86.1.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-2021:4770-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4770
Issued Date: : 2021-11-23
CVE Names: CVE-2020-36385

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6Advanced Update Support, Red Hat Enterprise Linux 7.6 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.6 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. 7.6) - noarch, x86_64

Red Hat Enterprise Linux Server E4S (v. 7.6) - noarch, ppc64le, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.6) - x86_64

Red Hat Enterprise Linux Server Optional E4S (v. 7.6) - ppc64le, x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 7.6) - x86_64

Red Hat Enterprise Linux Server TUS (v. 7.6) - noarch, x86_64


Bugs Fixed

1974319 - CVE-2020-36385 kernel: use-after-free in drivers/infiniband/core/ucma.c ctx use-after-free


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Open Source maintainers and developers have been warned about the continued wave of attacks aimed at project maintainers similar to those recently
28.Lock Globe Esm H320
1 - 2 min read
A resurgence of cyberattacks targeting Linux systems in Asian campaigns through the utilization of the Pupy Remote Access Trojan (RAT) has been
27.Tablet Connections Blocks Lock Esm H320
2 - 4 min read
Canonical has recently announced the Beta release of Ubuntu Linux 24.04 LTS , codenamed "Noble Numbat." This release aims to continue Ubuntu's
21.Globe RadiatingCode Esm H320
2 - 3 min read
The open-source movement has come a long way, from its origins in the 1960s and 1970s to becoming an integral part of organizations worldwide.
13.Lock StylizedMotherboard Esm H320
2 - 3 min read
The Rust-based Edera project demonstrates a unique approach to container security that addresses cloud-native computing challenges. Let's examine
8.Locks HexConnections CodeGlobe Esm H320
2 - 3 min read
Canonical has launched Ubuntu Pro for Devices , a comprehensive offering emphasizing security and compliance for IoT device deployments. This
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