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AUSCERT External Security Bulletin Redistribution
ESB-2024.1622
kernel-rt security update
15 March 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-2023-4921 CVE-2022-42896 CVE-2024-26602
CVE-2023-38409 CVE-2024-1086 CVE-2023-45871
Original Bulletin:
https://access.redhat.com/errata/RHSA-2024:1332
Comment: CVSS (Max): 8.1 CVE-2022-42896 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)
CVSS Source: Red Hat
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
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Red Hat Security Advisory
Synopsis: Important: kernel-rt security update
Advisory ID: RHSA-2024:1332
Product: Red Hat Enterprise Linux for Real Time for NFV (v. 7)
Advisory URL: https://access.redhat.com/errata/RHSA-2024:1332
Issue date: 2024-03-14
CVE Names: CVE-2022-42896 CVE-2023-4921 CVE-2023-38409 CVE-2023-45871
CVE-2024-1086 CVE-2024-26602
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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):
* sched/membarrier: reduce the ability to hammer on sys_membarrier
(CVE-2024-26602)
* use-after-free in l2cap_connect and l2cap_le_connect_req in
net/bluetooth/l2cap_core.c (CVE-2022-42896)
* use-after-free in sch_qfq network scheduler (CVE-2023-4921)
* IGB driver inadequate buffer size for frames larger than MTU (CVE-2023-45871)
* fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map
assignment (CVE-2023-38409)
* nf_tables: use-after-free vulnerability in the nft_verdict_init() function
(CVE-2024-1086)
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/):
2147364 - CVE-2022-42896 - kernel: use-after-free in l2cap_connect and
l2cap_le_connect_req in net/bluetooth/l2cap_core.c
2245514 - CVE-2023-4921 - kernel: use-after-free in sch_qfq network scheduler
2230042 - CVE-2023-38409 - kernel: fbcon: out-of-sync arrays in
fbcon_mode_deleted due to wrong con2fb_map assignment
2244723 - CVE-2023-45871 - kernel: IGB driver inadequate buffer size for frames
larger than MTU
2262126 - CVE-2024-1086 - kernel: nf_tables: use-after-free vulnerability in the
nft_verdict_init() function
2267695 - CVE-2024-26602 - kernel: sched/membarrier: reduce the ability to
hammer on sys_membarrier
6. Package List:
Red Hat Enterprise Linux for Real Time for NFV (v. 7)
Source:
kernel-rt-0:3.10.0-1160.114.2.rt56.1266.el7.src.rpm
x86_64:
kernel-rt-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debug-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debug-debuginfo-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debug-devel-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debug-kvm-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debuginfo-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-devel-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-kvm-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-trace-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-trace-debuginfo-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-trace-devel-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-trace-kvm-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
noarch:
kernel-rt-doc-0:3.10.0-1160.114.2.rt56.1266.el7.noarch.rpm
Red Hat Enterprise Linux for Real Time (v. 7)
Source:
kernel-rt-0:3.10.0-1160.114.2.rt56.1266.el7.src.rpm
x86_64:
kernel-rt-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debug-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debug-debuginfo-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debug-devel-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debug-kvm-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debug-kvm-debuginfo-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debuginfo-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-devel-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-kvm-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-kvm-debuginfo-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-trace-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-trace-debuginfo-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-trace-devel-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-trace-kvm-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
kernel-rt-trace-kvm-debuginfo-0:3.10.0-1160.114.2.rt56.1266.el7.x86_64.rpm
noarch:
kernel-rt-doc-0:3.10.0-1160.114.2.rt56.1266.el7.noarch.rpm
7. References:
https://access.redhat.com/security/cve/CVE-2022-42896
https://access.redhat.com/security/cve/CVE-2023-4921
https://access.redhat.com/security/cve/CVE-2023-38409
https://access.redhat.com/security/cve/CVE-2023-45871
https://access.redhat.com/security/cve/CVE-2024-1086
https://access.redhat.com/security/cve/CVE-2024-26602
https://access.redhat.com/security/updates/classification/#important
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