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AUSCERT External Security Bulletin Redistribution
ESB-2024.2540
kernel-rt security update
26 April 2024
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AusCERT Security Bulletin Summary
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Product: kernel-rt
Publisher: Red Hat
Operating System: Red Hat
Resolution: Patch/Upgrade
CVE Names: CVE-2023-4623 CVE-2023-25775 CVE-2020-36558
CVE-2023-4622 CVE-2023-2002
Original Bulletin:
https://access.redhat.com/errata/RHSA-2024:2003
Comment: CVSS (Max): 7.8 CVE-2023-4623 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: Red Hat
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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Red Hat Security Advisory
Synopsis: Important: kernel-rt security update
Advisory ID: RHSA-2024:2003
Product: Red Hat Enterprise Linux for Real Time for NFV (v. 7)
Advisory URL: https://access.redhat.com/errata/RHSA-2024:2003
Issue date: 2024-04-23
CVE Names: CVE-2020-36558 CVE-2023-2002 CVE-2023-4622 CVE-2023-4623
CVE-2023-25775
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1. Summary:
An update for kernel-rt is now available for Red Hat Enterprise Linux 7.
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 for Real Time for NFV (v. 7) - x86_64, noarch
Red Hat Enterprise Linux for Real Time (v. 7) - x86_64, noarch
3. Description:
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 unix_stream_sendpage (CVE-2023-4622)
* kernel: race condition in VT_RESIZEX ioctl when vc_cons[i].d is already NULL
leading to NULL pointer dereference (CVE-2020-36558)
* kernel: bluetooth: Unauthorized management command execution (CVE-2023-2002)
* kernel: net/sched: sch_hfsc UAF (CVE-2023-4623)
* kernel: irdma: Improper access control (CVE-2023-25775)
Bug Fix(es):
* kernel-rt: Update RT source tree to the latest RHEL-7.9z30 batch [rhel-7.9.z]
(JIRA:RHEL-26440)
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:
Before applying this update, make sure all previously released errata relevant
to your system have been applied.
For details on how to apply this update, 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/):
2112693 - CVE-2020-36558 - kernel: race condition in VT_RESIZEX ioctl when
vc_cons[i].d is already NULL leading to NULL pointer dereference
2187308 - CVE-2023-2002 - Kernel: bluetooth: Unauthorized management command
execution
2237760 - CVE-2023-4622 - kernel: use after free in unix_stream_sendpage
2237757 - CVE-2023-4623 - kernel: net/sched: sch_hfsc UAF
2231410 - CVE-2023-25775 - kernel: irdma: Improper access control
6. Package List:
Red Hat Enterprise Linux for Real Time for NFV (v. 7)
Source:
kernel-rt-0:3.10.0-1160.118.1.rt56.1269.el7.src.rpm
x86_64:
kernel-rt-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debug-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debug-debuginfo-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debug-devel-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debug-kvm-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debuginfo-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-devel-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-kvm-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-trace-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-trace-debuginfo-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-trace-devel-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-trace-kvm-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
noarch:
kernel-rt-doc-0:3.10.0-1160.118.1.rt56.1269.el7.noarch.rpm
Red Hat Enterprise Linux for Real Time (v. 7)
Source:
kernel-rt-0:3.10.0-1160.118.1.rt56.1269.el7.src.rpm
x86_64:
kernel-rt-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debug-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debug-debuginfo-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debug-devel-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debug-kvm-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debuginfo-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-devel-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-kvm-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-trace-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-trace-debuginfo-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-trace-devel-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-trace-kvm-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-0:3.10.0-1160.118.1.rt56.1269.el7.x86_64.rpm
noarch:
kernel-rt-doc-0:3.10.0-1160.118.1.rt56.1269.el7.noarch.rpm
7. References:
https://access.redhat.com/security/cve/CVE-2020-36558
https://access.redhat.com/security/cve/CVE-2023-2002
https://access.redhat.com/security/cve/CVE-2023-4622
https://access.redhat.com/security/cve/CVE-2023-4623
https://access.redhat.com/security/cve/CVE-2023-25775
https://access.redhat.com/security/updates/classification/#important
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