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AUSCERT External Security Bulletin Redistribution
ESB-2023.3697
Security update for the Linux Kernel RT (Live Patch 2 for SLE 15 SP4)
29 June 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: Linux Kernel RT (Live Patch 2 for SLE 15 SP4)
Publisher: SUSE
Operating System: SUSE
Resolution: Patch/Upgrade
CVE Names: CVE-2023-31436 CVE-2023-28466 CVE-2023-23455
Original Bulletin:
https://www.suse.com/support/update/announcement/2023/suse-su-20232680-1
Comment: CVSS (Max): 7.8 CVE-2023-28466 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: SUSE
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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Security update for the Linux Kernel RT (Live Patch 2 for SLE 15 SP4)
Announcement ID: SUSE-SU-2023:2680-1
Rating: important
o #1207189
References: o #1210452
o #1210989
o CVE-2023-23455
Cross-References: o CVE-2023-28466
o CVE-2023-31436
o CVE-2023-23455 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N
/S:U/C:H/I:H/A:H
o CVE-2023-23455 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/
S:U/C:N/I:N/A:H
o CVE-2023-28466 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N
/S:U/C:H/I:H/A:H
CVSS scores: o CVE-2023-28466 ( NVD ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/
S:U/C:H/I:H/A:H
o CVE-2023-31436 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N
/S:U/C:H/I:H/A:H
o CVE-2023-31436 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/
S:U/C:H/I:H/A:H
o SUSE Linux Enterprise High Performance Computing 15 SP4
o SUSE Linux Enterprise Live Patching 15-SP4
Affected o SUSE Linux Enterprise Micro 5.3
Products: o SUSE Linux Enterprise Micro 5.4
o SUSE Linux Enterprise Real Time 15 SP4
o SUSE Linux Enterprise Server 15 SP4
o SUSE Linux Enterprise Server for SAP Applications 15 SP4
An update that solves three vulnerabilities can now be installed.
Description:
This update for the Linux Kernel 5.14.21-150400_15_8 fixes several issues.
The following security issues were fixed:
o CVE-2023-23455: Fixed a denial of service inside atm_tc_enqueue in net/
sched/sch_atm.c because of type confusion (non-negative numbers can
sometimes indicate a TC_ACT_SHOT condition rather than valid classification
results) (bsc#1207189).
o CVE-2023-31436: Fixed an out-of-bounds write in qfq_change_class() because
lmax can exceed QFQ_MIN_LMAX (bsc#1210989).
o CVE-2023-28466: Fixed race condition that could lead to use-after-free or
NULL pointer dereference in do_tls_getsockopt in net/tls/tls_main.c (bsc#
1210452).
Patch Instructions:
To install this SUSE Important update use the SUSE recommended installation
methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:
o SUSE Linux Enterprise Live Patching 15-SP4
zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP4-2023-2680=1
Package List:
o SUSE Linux Enterprise Live Patching 15-SP4 (x86_64)
kernel-livepatch-SLE15-SP4-RT_Update_2-debugsource-6-150400.2.2
kernel-livepatch-5_14_21-150400_15_8-rt-6-150400.2.2
kernel-livepatch-5_14_21-150400_15_8-rt-debuginfo-6-150400.2.2
References:
o https://www.suse.com/security/cve/CVE-2023-23455.html
o https://www.suse.com/security/cve/CVE-2023-28466.html
o https://www.suse.com/security/cve/CVE-2023-31436.html
o https://bugzilla.suse.com/show_bug.cgiid=1207189
o https://bugzilla.suse.com/show_bug.cgiid=1210452
o https://bugzilla.suse.com/show_bug.cgiid=1210989
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