# Security update for the Linux Kernel RT (Live Patch 1 for SLE 15 SP5) Announcement ID: SUSE-SU-2023:3784-1 Rating: important References: * #1210619 * #1213064 * #1213587 * #1214123 * #1215119 Cross-References: * CVE-2023-1829 * CVE-2023-31248 * CVE-2023-3609 * CVE-2023-3776 * 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-2023-4273 ( 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 five vulnerabilities can now be installed. ## Description: This update for the Linux Kernel 5.14.21-150500_13_5 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-2023-31248: 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-SP4-2023-3784=1 * openSUSE Leap 15.5 zypper in -t patch SUSE-2023-3787=1 * SUSE Linux Enterprise Live Patching 15-SP5 zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP5-2023-3787=1 ## Package List: * SUSE Linux Enterprise Live Patching 15-SP4 (x86_64) * kernel-livepatch-5_14_21-150400_15_37-rt-3-150400.2.1 * kernel-livepatch-5_14_21-150400_15_37-rt-debuginfo-3-150400.2.1 * kernel-livepatch-SLE15-SP4-RT_Update_8-debugsource-3-150400.2.1 * openSUSE Leap 15.5 (x86_64) * kernel-livepatch-SLE15-SP5-RT_Update_1-debugsource-3-150500.2.1 * kernel-livepatch-5_14_21-150500_13_5-rt-debuginfo-3-150500.2.1 * kernel-livepatch-5_14_21-150500_13_5-rt-3-150500.2.1 * SUSE Linux Enterprise Live Patching 15-SP5 (x86_64) * kernel-livepatch-SLE15-SP5-RT_Update_1-debugsource-3-150500.2.1 * kernel-livepatch-5_14_21-150500_13_5-rt-debuginfo-3-150500.2.1 * kernel-livepatch-5_14_21-150500_13_5-rt-3-150500.2.1 ## 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-2023-4273.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=1214123 * https://bugzilla.suse.com/show_bug.cgi?id=1215119