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Red Hat Enterprise Linux 8 RHSA-2023:4541-01 kernel-rt Critical Security Vulnerabilities Identified

red hat
Calendar Grey August 8, 2023
Dist Redhat Esm H88
An important patch for kernel-rt within Red Hat Enterprise Linux 8 tackles several critical security flaws.
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: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c (CVE-2022-42896)
* kernel: tcindex: use-after-free vulnerability in traffic control index filter allows privilege escalation (CVE-2023-1281)
* kernel: Use-after-free vulnerability in the Linux Kernel traffic control index filter (CVE-2023-1829)
* kernel: use-after-free vulnerability in the perf_group_detach function of the Linux Kernel Performance Events (CVE-2023-2235)
* kernel: OOB access in the Linux kernel's XFS subsystem (CVE-2023-2124)
* kernel: i2c: out-of-bounds write in xgene_slimpro_i2c_xfer() (CVE-2023-2194)
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):
* Addding the building of i915 driver to 8.8 (BZ#2208276)
* kernel-rt: update RT source tree to the RHEL-8.8.z2 source tree (BZ#2215026)

Topics%20covered

Topics Covered

security advisory update privilege escalation Red Hat Enterprise Linux important kernel real-time kernel

References

https://access.redhat.com/security/cve/CVE-2022-42896 https://access.redhat.com/security/cve/CVE-2023-1281 https://access.redhat.com/security/cve/CVE-2023-1829 https://access.redhat.com/security/cve/CVE-2023-2124 https://access.redhat.com/security/cve/CVE-2023-2194 https://access.redhat.com/security/cve/CVE-2023-2235 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux NFV (v. 8):
Source: kernel-rt-4.18.0-477.21.1.rt7.284.el8_8.src.rpm
x86_64: kernel-rt-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-core-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-debug-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-debug-core-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-debug-debuginfo-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-debug-devel-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-debug-kvm-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-debug-modules-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-debug-modules-extra-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-debuginfo-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-debuginfo-common-x86_64-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-devel-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-kvm-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-modules-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-modules-extra-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm
Red Hat Enterprise Linux RT (v. 8):
Source: kernel-rt-4.18.0-477.21.1.rt7.284.el8_8.src.rpm
x86_64: kernel-rt-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-core-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm kernel-rt-debug-4.18.0-477.21.1.rt7.284.el8_8.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2023:4541-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:4541
Issue date: 2023-08-08

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 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.

Topics%20covered

Topics Covered

security advisory update privilege escalation Red Hat Enterprise Linux important kernel real-time kernel

Relevant Releases Architectures

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

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

Bugs Fixed

2147364 - CVE-2022-42896 kernel: use-after-free in l2cap_connect and l2cap_le_connect_req in net/bluetooth/l2cap_core.c

2181847 - CVE-2023-1281 kernel: tcindex: use-after-free vulnerability in traffic control index filter allows privilege escalation

2187439 - CVE-2023-2124 kernel: OOB access in the Linux kernel's XFS subsystem

2188396 - CVE-2023-2194 kernel: i2c: out-of-bounds write in xgene_slimpro_i2c_xfer()

2188470 - CVE-2023-1829 kernel: Use-after-free vulnerability in the Linux Kernel traffic control index filter

2192589 - CVE-2023-2235 kernel: use-after-free vulnerability in the perf_group_detach function of the Linux Kernel Performance Events

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