Security update for the Linux Kernel RT (Live Patch 0 for SLE 15 SP5)

Announcement ID:	SUSE-SU-2023:3772-1
Rating:	important
References:	bsc#1210619 bsc#1213064 bsc#1213587 bsc#1213706 bsc#1214123 bsc#1215119
Cross-References:	CVE-2023-1829 CVE-2023-31248 CVE-2023-3609 CVE-2023-3776 CVE-2023-3812 CVE-2023-4273
CVSS scores:	CVE-2023-1829 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-1829 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-31248 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-31248 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-3609 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-3609 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-3776 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-3776 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-3812 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-3812 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-4273 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-4273 ( NVD ): 6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Affected Products:	openSUSE Leap 15.5 SUSE Linux Enterprise High Performance Computing 15 SP4 SUSE Linux Enterprise High Performance Computing 15 SP5 SUSE Linux Enterprise Live Patching 15-SP4 SUSE Linux Enterprise Live Patching 15-SP5 SUSE Linux Enterprise Micro 5.3 SUSE Linux Enterprise Micro 5.4 SUSE Linux Enterprise Micro 5.5 SUSE Linux Enterprise Real Time 15 SP4 SUSE Linux Enterprise Real Time 15 SP5 SUSE Linux Enterprise Server 15 SP4 SUSE Linux Enterprise Server 15 SP5 SUSE Linux Enterprise Server for SAP Applications 15 SP4 SUSE Linux Enterprise Server for SAP Applications 15 SP5

An update that solves six vulnerabilities can now be installed.

Description:

This update for the Linux Kernel 5.14.21-150500_11 fixes several issues.

The following security issues were fixed:

• CVE-2023-3776: Fixed improper refcount update in cls_fw leads to use-after-free (bsc#1215119).
• CVE-2023-1829: Fixed a use-after-free vulnerability in the control index filter (tcindex) (bsc#1210619).
• CVE-2023-4273: Fixed a flaw in the exFAT driver of the Linux kernel that alloawed a local privileged attacker to overflow the kernel stack (bsc#1214123).
• CVE-2023-3609: Fixed reference counter leak leading to overflow in net/sched (bsc#1213587).
• CVE-2023-3812: Fixed an out-of-bounds memory access flaw in the TUN/TAP device driver functionality that could allow a local user to crash or potentially escalate their privileges on the system (bsc#1213706).
• CVE-2023-31248: Fixed an use-after-free vulnerability in nft_chain_lookup_byid that could allow a local attacker to escalate their privilege (bsc#1213064).

Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

• SUSE Linux Enterprise Live Patching 15-SP4
  zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP4-2023-3772=1 SUSE-SLE-Module-Live-Patching-15-SP4-2023-3769=1 SUSE-SLE-Module-Live-Patching-15-SP4-2023-3770=1 SUSE-SLE-Module-Live-Patching-15-SP4-2023-3771=1 SUSE-SLE-Module-Live-Patching-15-SP4-2023-3775=1
• openSUSE Leap 15.5
  zypper in -t patch SUSE-2023-3774=1
• SUSE Linux Enterprise Live Patching 15-SP5
  zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP5-2023-3774=1

Package List:

• SUSE Linux Enterprise Live Patching 15-SP4 (x86_64)
  • kernel-livepatch-5_14_21-150400_15_5-rt-debuginfo-10-150400.2.2
  • kernel-livepatch-SLE15-SP4-RT_Update_3-debugsource-8-150400.2.2
  • kernel-livepatch-SLE15-SP4-RT_Update_7-debugsource-6-150400.2.1
  • kernel-livepatch-SLE15-SP4-RT_Update_5-debugsource-7-150400.2.1
  • kernel-livepatch-SLE15-SP4-RT_Update_1-debugsource-10-150400.2.2
  • kernel-livepatch-5_14_21-150400_15_8-rt-debuginfo-9-150400.2.2
  • kernel-livepatch-5_14_21-150400_15_11-rt-8-150400.2.2
  • kernel-livepatch-5_14_21-150400_15_28-rt-6-150400.2.1
  • kernel-livepatch-5_14_21-150400_15_18-rt-7-150400.2.1
  • kernel-livepatch-SLE15-SP4-RT_Update_2-debugsource-9-150400.2.2
  • kernel-livepatch-5_14_21-150400_15_18-rt-debuginfo-7-150400.2.1
  • kernel-livepatch-5_14_21-150400_15_11-rt-debuginfo-8-150400.2.2
  • kernel-livepatch-5_14_21-150400_15_8-rt-9-150400.2.2
  • kernel-livepatch-5_14_21-150400_15_5-rt-10-150400.2.2
• openSUSE Leap 15.5 (x86_64)
  • kernel-livepatch-5_14_21-150500_11-rt-4-150500.9.2
  • kernel-livepatch-5_14_21-150500_11-rt-debuginfo-4-150500.9.2
  • kernel-livepatch-SLE15-SP5-RT_Update_0-debugsource-4-150500.9.2
• SUSE Linux Enterprise Live Patching 15-SP5 (x86_64)
  • kernel-livepatch-5_14_21-150500_11-rt-4-150500.9.2
  • kernel-livepatch-5_14_21-150500_11-rt-debuginfo-4-150500.9.2
  • kernel-livepatch-SLE15-SP5-RT_Update_0-debugsource-4-150500.9.2

References:

• https://www.suse.com/security/cve/CVE-2023-1829.html
• https://www.suse.com/security/cve/CVE-2023-31248.html
• https://www.suse.com/security/cve/CVE-2023-3609.html
• https://www.suse.com/security/cve/CVE-2023-3776.html
• https://www.suse.com/security/cve/CVE-2023-3812.html
• https://www.suse.com/security/cve/CVE-2023-4273.html
• https://bugzilla.suse.com/show_bug.cgi?id=1210619
• https://bugzilla.suse.com/show_bug.cgi?id=1213064
• https://bugzilla.suse.com/show_bug.cgi?id=1213587
• https://bugzilla.suse.com/show_bug.cgi?id=1213706
• https://bugzilla.suse.com/show_bug.cgi?id=1214123
• https://bugzilla.suse.com/show_bug.cgi?id=1215119