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Red Hat 8 RHSA-2023:5255-01 Important: Kernel-RT Security Fix

red hat
Calendar Grey September 19, 2023
Dist Redhat Esm H88
A significant patch has been released for Red Hat Enterprise Linux 8, targeting vital security vulnerabilities within the kernel-rt.
An update for kernel-rt is now available for Red Hat Enterprise Linux 8

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-rt packages provide the Real Time Linux Kernel, which enables fine- tuning for systems with extremely high determinism requirements.
Security Fix(es):
* kernel: bluetooth: Unauthorized management command execution (CVE-2023-2002)
* kernel: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests (CVE-2023-3390)
* kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt() (CVE-2023-35788)
* hw: amd: Cross-Process Information Leak (CVE-2023-20593,zenbleed)
* kernel: ipvlan: out-of-bounds write caused by unclear skb->cb (CVE-2023-3090)
* kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval() (CVE-2023-35001,ZDI-CAN-20721)
* kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function (CVE-2023-3776)
* kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove() (CVE-2023-4004)
Bug Fix(es):
* kernel-rt: update RT source tree to the RHEL-8.8.z3 source tree (BZ#2227068)
* pods get restarted due to failed probes (BZ#2227238)

Topics%20covered

Topics Covered

security advisory Red Hat bug fix security impact important update kernel-rt cross-process leak

References

https://access.redhat.com/security/cve/CVE-2023-2002 https://access.redhat.com/security/cve/CVE-2023-3090 https://access.redhat.com/security/cve/CVE-2023-3390 https://access.redhat.com/security/cve/CVE-2023-3776 https://access.redhat.com/security/cve/CVE-2023-4004 https://access.redhat.com/security/cve/CVE-2023-20593 https://access.redhat.com/security/cve/CVE-2023-35001 https://access.redhat.com/security/cve/CVE-2023-35788 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux NFV (v. 8):
Source: kernel-rt-4.18.0-477.27.1.rt7.290.el8_8.src.rpm
x86_64: kernel-rt-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-core-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-debug-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-debug-core-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-debug-devel-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-debug-kvm-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-debug-modules-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-debuginfo-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-devel-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-kvm-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-modules-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-modules-extra-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm
Red Hat Enterprise Linux RT (v. 8):
Source: kernel-rt-4.18.0-477.27.1.rt7.290.el8_8.src.rpm
x86_64: kernel-rt-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-core-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm kernel-rt-debug-4.18.0-477.27.1.rt7.290.el8_8.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:5255-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:5255
Issue date: 2023-09-19

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.'Red Hat Product Security has rated this update as having a security impactofImportant. A Common Vulnerability Scoring System (CVSS) base score, whichgivesa detailed severity rating, is available for each vulnerability from theCVElink(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix security impact important update kernel-rt cross-process leak

Relevant Releases Architectures

Red Hat Enterprise Linux NFV (v. 8) - x86_64

Red Hat Enterprise Linux RT (v. 8) - x86_64

Bugs Fixed

2187308 - CVE-2023-2002 Kernel: bluetooth: Unauthorized management command execution

2213260 - CVE-2023-3390 kernel: UAF in nftables when nft_set_lookup_global triggered after handling named and anonymous sets in batch requests

2215768 - CVE-2023-35788 kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt()

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

2218672 - CVE-2023-3090 kernel: ipvlan: out-of-bounds write caused by unclear skb->cb

2220892 - CVE-2023-35001 kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval()

2225097 - CVE-2023-3776 kernel: net/sched: cls_fw component can be exploited as result of failure in tcf_change_indev function

2225275 - CVE-2023-4004 kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove()

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