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

Synopsis:          Important: kernel security update
Advisory ID:       RHSA-2023:4696-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:4696
Issue date:        2023-08-22
CVE Names:         CVE-2023-20593 CVE-2023-32233 
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.6
Advanced 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.

2. Relevant releases/architectures:

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

3. Description:

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

Security Fix(es):

* kernel: netfilter: use-after-free in nf_tables when processing batch
requests can lead to privilege escalation (CVE-2023-32233)

* hw: amd: Cross-Process Information Leak (CVE-2023-20593)

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.

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/):

2196105 - CVE-2023-32233 kernel: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation
2217845 - CVE-2023-20593 hw: amd: Cross-Process Information Leak

6. Package List:

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

Source:
kernel-3.10.0-957.105.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-957.105.1.el7.noarch.rpm
kernel-doc-3.10.0-957.105.1.el7.noarch.rpm

x86_64:
bpftool-3.10.0-957.105.1.el7.x86_64.rpm
kernel-3.10.0-957.105.1.el7.x86_64.rpm
kernel-debug-3.10.0-957.105.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-957.105.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.105.1.el7.x86_64.rpm
kernel-devel-3.10.0-957.105.1.el7.x86_64.rpm
kernel-headers-3.10.0-957.105.1.el7.x86_64.rpm
kernel-tools-3.10.0-957.105.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-957.105.1.el7.x86_64.rpm
perf-3.10.0-957.105.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm
python-perf-3.10.0-957.105.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm

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

x86_64:
kernel-debug-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-957.105.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-957.105.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-957.105.1.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-2023-20593
https://access.redhat.com/security/cve/CVE-2023-32233
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 2023 Red Hat, Inc.
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RedHat: RHSA-2023-4696:01 Important: kernel security update

An update for kernel is now available for Red Hat Enterprise Linux 7.6 Advanced Update Support

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* kernel: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation (CVE-2023-32233)
* hw: amd: Cross-Process Information Leak (CVE-2023-20593)
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.



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-2023-20593 https://access.redhat.com/security/cve/CVE-2023-32233 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Server AUS (v. 7.6):
Source: kernel-3.10.0-957.105.1.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-957.105.1.el7.noarch.rpm kernel-doc-3.10.0-957.105.1.el7.noarch.rpm
x86_64: bpftool-3.10.0-957.105.1.el7.x86_64.rpm kernel-3.10.0-957.105.1.el7.x86_64.rpm kernel-debug-3.10.0-957.105.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-957.105.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.105.1.el7.x86_64.rpm kernel-devel-3.10.0-957.105.1.el7.x86_64.rpm kernel-headers-3.10.0-957.105.1.el7.x86_64.rpm kernel-tools-3.10.0-957.105.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-957.105.1.el7.x86_64.rpm perf-3.10.0-957.105.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm python-perf-3.10.0-957.105.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.6):
x86_64: kernel-debug-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-957.105.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-957.105.1.el7.x86_64.rpm perf-debuginfo-3.10.0-957.105.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-957.105.1.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-2023:4696-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:4696
Issued Date: : 2023-08-22
CVE Names: CVE-2023-20593 CVE-2023-32233

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.6Advanced Update Support.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 Optional AUS (v. 7.6) - x86_64


Bugs Fixed

2196105 - CVE-2023-32233 kernel: netfilter: use-after-free in nf_tables when processing batch requests can lead to privilege escalation

2217845 - CVE-2023-20593 hw: amd: Cross-Process Information Leak


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