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AUSCERT External Security Bulletin Redistribution
ESB-2024.2354
kernel-rt security update
17 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-2023-6931 CVE-2021-33631
Original Bulletin:
https://access.redhat.com/errata/RHSA-2024:1840
Comment: CVSS (Max): 7.3 CVE-2021-33631 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/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:R/S:U/C:H/I:H/A:H
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Red Hat Security Advisory
Synopsis: Moderate: kernel-rt security update
Advisory ID: RHSA-2024:1840
Product: Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
Advisory URL: https://access.redhat.com/errata/RHSA-2024:1840
Issue date: 2024-04-16
CVE Names: CVE-2021-33631 CVE-2023-6931
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1. Summary:
An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0
Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of
Moderate. 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 Real Time for NFV EUS (v.9.0) - x86_64
Red Hat Enterprise Linux Real Time EUS (v.9.0) - x86_64
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: ext4: kernel bug in ext4_write_inline_data_end() (CVE-2021-33631)
* kernel: Out of boundary write in perf_read_group() as result of overflow a
perf_event's read_size (CVE-2023-6931)
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/):
2261976 - CVE-2021-33631 - kernel: ext4: kernel bug in
ext4_write_inline_data_end()
2252731 - CVE-2023-6931 - kernel: Out of boundary write in perf_read_group() as
result of overflow a perf_event's read_size
6. Package List:
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
Source:
kernel-rt-0:5.14.0-70.97.1.rt21.169.el9_0.src.rpm
x86_64:
kernel-rt-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-core-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-core-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-debuginfo-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-devel-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-kvm-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-modules-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-modules-extra-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debuginfo-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-devel-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-kvm-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-modules-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-modules-extra-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
Red Hat Enterprise Linux Real Time EUS (v.9.0)
Source:
kernel-rt-0:5.14.0-70.97.1.rt21.169.el9_0.src.rpm
x86_64:
kernel-rt-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-core-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-core-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-debuginfo-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-devel-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-kvm-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-modules-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debug-modules-extra-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debuginfo-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-devel-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-kvm-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-modules-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
kernel-rt-modules-extra-0:5.14.0-70.97.1.rt21.169.el9_0.x86_64.rpm
7. References:
https://access.redhat.com/security/cve/CVE-2021-33631
https://access.redhat.com/security/cve/CVE-2023-6931
https://access.redhat.com/security/updates/classification/#moderate
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