Home / mailings [RHSA-2023:4696-01] Important: kernel security update
Posted on 22 August 2023
RedHat===================================================================== 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 <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2023 Red Hat, Inc.
