RHSA-2023:1220: Important: kernel-rt security and bug fix update
First published: Tue Mar 14 2023(Updated: )
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.<br>Security Fix(es):<br><li> kernel: use-after-free caused by l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c (CVE-2022-3564)</li> <li> kernel: stack overflow in do_proc_dointvec and proc_skip_spaces (CVE-2022-4378)</li> <li> kernel: net: CPU soft lockup in TC mirred egress-to-ingress action (CVE-2022-4269)</li> 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.<br>Bug Fix(es):<br><li> kernel-rt: update RT source tree to the RHEL-8.4.z15 source tree. (BZ#2162415)</li>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-core | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-debug | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-debug-core | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-debug-debuginfo | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-debug-devel | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-debug-modules | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-debug-modules-extra | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-debuginfo | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-devel | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-modules | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-modules-extra | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-debug-kvm | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
| redhat/kernel-rt-kvm | <4.18.0-305.82.1.rt7.154.el8_4 | 4.18.0-305.82.1.rt7.154.el8_4 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of RHSA-2023:1220?
The severity of RHSA-2023:1220 is considered critical due to the use-after-free vulnerability that can be exploited remotely.
How do I fix RHSA-2023:1220?
To fix RHSA-2023:1220, update the kernel-rt packages to version 4.18.0-305.82.1.rt7.154.el8_4 or later.
What systems are affected by RHSA-2023:1220?
RHSA-2023:1220 affects various versions of the kernel-rt packages on Red Hat Enterprise Linux 8 systems.
What vulnerability is addressed in RHSA-2023:1220?
RHSA-2023:1220 addresses a use-after-free vulnerability caused by l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c.
Is there any risk if I do not apply the RHSA-2023:1220 update?
Not applying the RHSA-2023:1220 update poses a significant risk as it could allow attackers to exploit the use-after-free vulnerability.
- agent/severity
- agent/type
- agent/softwarecombine
- agent/first-publish-date
- agent/last-modified-date
- collector/redhat-errata
- source/Red Hat
- anchor-id/RHSA-2023:1220
- agent/software-canonical-lookup
- agent/weakness
- agent/remedy
- agent/title
- agent/references
- agent/description
- agent/event
- agent/trending
- agent/tags
- agent/source
- package-manager/redhat