Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2024.2352
kernel security update
17 April 2024
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AusCERT Security Bulletin Summary
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Product: kernel
Publisher: Red Hat
Operating System: Red Hat
Resolution: Patch/Upgrade
CVE Names: CVE-2023-3611 CVE-2023-4921 CVE-2023-31436
CVE-2023-3776
Original Bulletin:
https://access.redhat.com/errata/RHSA-2024:1831
Comment: CVSS (Max): 7.8 CVE-2023-4921 (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 security update
Advisory ID: RHSA-2024:1831
Product: Red Hat Enterprise Linux Server (v. 6 ELS)
Advisory URL: https://access.redhat.com/errata/RHSA-2024:1831
Issue date: 2024-04-16
CVE Names: CVE-2023-3611 CVE-2023-3776 CVE-2023-4921 CVE-2023-31436
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1. Summary:
An update for kernel is now available for Red Hat Enterprise Linux 6 Extended
Lifecycle Support.
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 Server (v. 6 ELS) - x86_64, i686, s390x, noarch
Red Hat Enterprise Linux Server Optional (v. 6 ELS) - x86_64, i686, s390x,
noarch
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux operating
system.
Security Fix(es):
* kernel: out-of-bounds write in qfq_change_class function (CVE-2023-31436)
* kernel: net/sched: sch_qfq component can be exploited if in qfq_change_agg
function happens qfq_enqueue overhead (CVE-2023-3611)
* kernel: net/sched: cls_fw component can be exploited as result of failure in
tcf_change_indev function (CVE-2023-3776)
* kernel: use-after-free in sch_qfq network scheduler (CVE-2023-4921)
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/):
2225191 - CVE-2023-3611 - kernel: net/sched: sch_qfq component can be exploited
if in qfq_change_agg function happens qfq_enqueue overhead
2225097 - CVE-2023-3776 - kernel: net/sched: cls_fw component can be exploited
as result of failure in tcf_change_indev function
2245514 - CVE-2023-4921 - kernel: use-after-free in sch_qfq network scheduler
2192671 - CVE-2023-31436 - kernel: out-of-bounds write in qfq_change_class
function
6. Package List:
Red Hat Enterprise Linux Server (v. 6 ELS)
i686:
kernel-0:2.6.32-754.53.1.el6.i686.rpm
kernel-debug-0:2.6.32-754.53.1.el6.i686.rpm
kernel-debug-debuginfo-0:2.6.32-754.53.1.el6.i686.rpm
kernel-debug-devel-0:2.6.32-754.53.1.el6.i686.rpm
kernel-debuginfo-0:2.6.32-754.53.1.el6.i686.rpm
kernel-debuginfo-common-i686-0:2.6.32-754.53.1.el6.i686.rpm
kernel-devel-0:2.6.32-754.53.1.el6.i686.rpm
kernel-headers-0:2.6.32-754.53.1.el6.i686.rpm
perf-0:2.6.32-754.53.1.el6.i686.rpm
perf-debuginfo-0:2.6.32-754.53.1.el6.i686.rpm
python-perf-0:2.6.32-754.53.1.el6.i686.rpm
python-perf-debuginfo-0:2.6.32-754.53.1.el6.i686.rpm
s390x:
kernel-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-debug-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-debug-debuginfo-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-debug-devel-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-debuginfo-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-devel-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-headers-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-kdump-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-kdump-debuginfo-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-kdump-devel-0:2.6.32-754.53.1.el6.s390x.rpm
perf-0:2.6.32-754.53.1.el6.s390x.rpm
perf-debuginfo-0:2.6.32-754.53.1.el6.s390x.rpm
python-perf-0:2.6.32-754.53.1.el6.s390x.rpm
python-perf-debuginfo-0:2.6.32-754.53.1.el6.s390x.rpm
Source:
kernel-0:2.6.32-754.53.1.el6.src.rpm
x86_64:
kernel-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-debug-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-debug-debuginfo-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-debug-devel-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-debuginfo-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-devel-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-headers-0:2.6.32-754.53.1.el6.x86_64.rpm
perf-0:2.6.32-754.53.1.el6.x86_64.rpm
perf-debuginfo-0:2.6.32-754.53.1.el6.x86_64.rpm
python-perf-0:2.6.32-754.53.1.el6.x86_64.rpm
python-perf-debuginfo-0:2.6.32-754.53.1.el6.x86_64.rpm
noarch:
kernel-abi-whitelists-0:2.6.32-754.53.1.el6.noarch.rpm
kernel-doc-0:2.6.32-754.53.1.el6.noarch.rpm
kernel-firmware-0:2.6.32-754.53.1.el6.noarch.rpm
Red Hat Enterprise Linux Server Optional (v. 6 ELS)
i686:
kernel-0:2.6.32-754.53.1.el6.i686.rpm
kernel-debug-0:2.6.32-754.53.1.el6.i686.rpm
kernel-debug-debuginfo-0:2.6.32-754.53.1.el6.i686.rpm
kernel-debug-devel-0:2.6.32-754.53.1.el6.i686.rpm
kernel-debuginfo-0:2.6.32-754.53.1.el6.i686.rpm
kernel-debuginfo-common-i686-0:2.6.32-754.53.1.el6.i686.rpm
kernel-devel-0:2.6.32-754.53.1.el6.i686.rpm
kernel-headers-0:2.6.32-754.53.1.el6.i686.rpm
perf-0:2.6.32-754.53.1.el6.i686.rpm
perf-debuginfo-0:2.6.32-754.53.1.el6.i686.rpm
python-perf-0:2.6.32-754.53.1.el6.i686.rpm
python-perf-debuginfo-0:2.6.32-754.53.1.el6.i686.rpm
s390x:
kernel-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-debug-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-debug-debuginfo-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-debug-devel-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-debuginfo-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-devel-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-headers-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-kdump-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-kdump-debuginfo-0:2.6.32-754.53.1.el6.s390x.rpm
kernel-kdump-devel-0:2.6.32-754.53.1.el6.s390x.rpm
perf-0:2.6.32-754.53.1.el6.s390x.rpm
perf-debuginfo-0:2.6.32-754.53.1.el6.s390x.rpm
python-perf-0:2.6.32-754.53.1.el6.s390x.rpm
python-perf-debuginfo-0:2.6.32-754.53.1.el6.s390x.rpm
Source:
kernel-0:2.6.32-754.53.1.el6.src.rpm
x86_64:
kernel-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-debug-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-debug-debuginfo-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-debug-devel-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-debuginfo-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-devel-0:2.6.32-754.53.1.el6.x86_64.rpm
kernel-headers-0:2.6.32-754.53.1.el6.x86_64.rpm
perf-0:2.6.32-754.53.1.el6.x86_64.rpm
perf-debuginfo-0:2.6.32-754.53.1.el6.x86_64.rpm
python-perf-0:2.6.32-754.53.1.el6.x86_64.rpm
python-perf-debuginfo-0:2.6.32-754.53.1.el6.x86_64.rpm
noarch:
kernel-abi-whitelists-0:2.6.32-754.53.1.el6.noarch.rpm
kernel-doc-0:2.6.32-754.53.1.el6.noarch.rpm
kernel-firmware-0:2.6.32-754.53.1.el6.noarch.rpm
7. References:
https://access.redhat.com/security/cve/CVE-2023-3611
https://access.redhat.com/security/cve/CVE-2023-3776
https://access.redhat.com/security/cve/CVE-2023-4921
https://access.redhat.com/security/cve/CVE-2023-31436
https://access.redhat.com/security/updates/classification/#important
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