# Security update for the Linux Kernel

Announcement ID: SUSE-SU-2023:4030-1  
Rating: important  
References:

  * #1207036
  * #1208995
  * #1210169
  * #1210643
  * #1212703
  * #1214233
  * #1214351
  * #1214380
  * #1214386
  * #1215115
  * #1215117
  * #1215150
  * #1215221
  * #1215275
  * #1215299

  
Cross-References:

  * CVE-2020-36766
  * CVE-2023-1192
  * CVE-2023-1206
  * CVE-2023-1859
  * CVE-2023-2177
  * CVE-2023-23454
  * CVE-2023-40283
  * CVE-2023-42753
  * CVE-2023-4389
  * CVE-2023-4622
  * CVE-2023-4623
  * CVE-2023-4881
  * CVE-2023-4921

  
CVSS scores:

  * CVE-2020-36766 ( SUSE ):  2.5 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
  * CVE-2020-36766 ( NVD ):  3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
  * CVE-2023-1192 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-1206 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-1206 ( NVD ):  5.7 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-1859 ( SUSE ):  1.9 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
  * CVE-2023-1859 ( NVD ):  4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-2177 ( SUSE ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-2177 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-23454 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-23454 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-40283 ( SUSE ):  5.7 CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  * CVE-2023-40283 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-42753 ( NVD ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-4389 ( SUSE ):  5.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
  * CVE-2023-4389 ( NVD ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-4622 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-4622 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-4623 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-4623 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-4881 ( SUSE ):  6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
  * CVE-2023-4881 ( NVD ):  6.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
  * CVE-2023-4921 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-4921 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  
Affected Products:

  * SUSE Linux Enterprise High Availability Extension 15 SP2
  * SUSE Linux Enterprise High Performance Computing 15 SP2
  * SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS 15-SP2
  * SUSE Linux Enterprise Live Patching 15-SP2
  * SUSE Linux Enterprise Server 15 SP2
  * SUSE Linux Enterprise Server 15 SP2 Business Critical Linux 15-SP2
  * SUSE Linux Enterprise Server 15 SP2 LTSS 15-SP2
  * SUSE Linux Enterprise Server for SAP Applications 15 SP2
  * SUSE Manager Proxy 4.1
  * SUSE Manager Retail Branch Server 4.1
  * SUSE Manager Server 4.1

  
  
An update that solves 13 vulnerabilities and has two security fixes can now be
installed.

## Description:

The SUSE Linux Enterprise 15 SP2 kernel was updated to receive various security
bugfixes.

The following security bugs were fixed:

  * CVE-2023-4389: Fixed a reference counting issue in the Btrfs filesystem that
    could be exploited in order to leak internal kernel information or crash the
    system (bsc#1214351).
  * CVE-2023-42753: Fixed an array indexing vulnerability in the netfilter
    subsystem. This issue may have allowed a local user to crash the system or
    potentially escalate their privileges (bsc#1215150).
  * CVE-2023-1206: Fixed a hash collision flaw in the IPv6 connection lookup
    table which could be exploited by network adjacent attackers, increasing CPU
    usage by 95% (bsc#1212703).
  * CVE-2023-4921: Fixed a use-after-free vulnerability in the QFQ network
    scheduler which could be exploited to achieve local privilege escalatio
    (bsc#1215275).
  * CVE-2023-23454: Fixed a type-confusion in the CBQ network scheduler
    (bsc#1207036).
  * CVE-2023-4622: Fixed a use-after-free vulnerability in the Unix domain
    sockets component which could be exploited to achieve local privilege
    escalation (bsc#1215117).
  * CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler
    which could be exploited to achieve local privilege escalation
    (bsc#1215115).
  * CVE-2020-36766: Fixed a potential information leak in in the CEC driver
    (bsc#1215299).
  * CVE-2023-1859: Fixed a use-after-free flaw in Xen transport for 9pfs which
    could be exploited to crash the system (bsc#1210169).
  * CVE-2023-2177: Fixed a null pointer dereference issue in the sctp network
    protocol which could allow a user to crash the system (bsc#1210643).
  * CVE-2023-4881: Fixed an out-of-bounds write flaw in the netfilter subsystem
    that could lead to information disclosure or denial of service
    (bsc#1215221).
  * CVE-2023-40283: Fixed a use-after-free issue in the Bluetooth subsystem
    (bsc#1214233).
  * CVE-2023-1192: Fixed a use-after-free in the CIFS subsystem (bsc#1208995).

The following non-security bugs were fixed:

  * check-for-config-changes: ignore BUILTIN_RETURN_ADDRESS_STRIPS_PAC
    (bsc#1214380).
  * mkspec: Allow unsupported KMPs (bsc#1214386)
  * rpm/mkspec-dtb: support for nested subdirs.
  * x86/srso: Do not probe microcode in a guest (git-fixes).
  * x86/srso: Fix SBPB enablement for spec_rstack_overflow=off (git-fixes).
  * x86/srso: Fix srso_show_state() side effect (git-fixes).
  * x86/srso: Set CPUID feature bits independently of bug or mitigation status
    (git-fixes).

## Special Instructions and Notes:

  * Please reboot the system after installing this update.

## 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-SP2  
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP2-2023-4030=1

  * SUSE Linux Enterprise High Availability Extension 15 SP2  
    zypper in -t patch SUSE-SLE-Product-HA-15-SP2-2023-4030=1

  * SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS 15-SP2  
    zypper in -t patch SUSE-SLE-Product-HPC-15-SP2-LTSS-2023-4030=1

  * SUSE Linux Enterprise Server 15 SP2 LTSS 15-SP2  
    zypper in -t patch SUSE-SLE-Product-SLES-15-SP2-LTSS-2023-4030=1

  * SUSE Linux Enterprise Server for SAP Applications 15 SP2  
    zypper in -t patch SUSE-SLE-Product-SLES_SAP-15-SP2-2023-4030=1

## Package List:

  * SUSE Linux Enterprise Live Patching 15-SP2 (nosrc)
    * kernel-default-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise Live Patching 15-SP2 (ppc64le s390x x86_64)
    * kernel-default-livepatch-5.3.18-150200.24.166.1
    * kernel-livepatch-SLE15-SP2_Update_41-debugsource-1-150200.5.3.1
    * kernel-default-livepatch-devel-5.3.18-150200.24.166.1
    * kernel-default-debuginfo-5.3.18-150200.24.166.1
    * kernel-livepatch-5_3_18-150200_24_166-default-1-150200.5.3.1
    * kernel-livepatch-5_3_18-150200_24_166-default-debuginfo-1-150200.5.3.1
    * kernel-default-debugsource-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise High Availability Extension 15 SP2 (aarch64 ppc64le
    s390x x86_64)
    * dlm-kmp-default-debuginfo-5.3.18-150200.24.166.1
    * gfs2-kmp-default-debuginfo-5.3.18-150200.24.166.1
    * gfs2-kmp-default-5.3.18-150200.24.166.1
    * kernel-default-debuginfo-5.3.18-150200.24.166.1
    * cluster-md-kmp-default-debuginfo-5.3.18-150200.24.166.1
    * ocfs2-kmp-default-5.3.18-150200.24.166.1
    * cluster-md-kmp-default-5.3.18-150200.24.166.1
    * dlm-kmp-default-5.3.18-150200.24.166.1
    * kernel-default-debugsource-5.3.18-150200.24.166.1
    * ocfs2-kmp-default-debuginfo-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise High Availability Extension 15 SP2 (nosrc)
    * kernel-default-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS 15-SP2 (aarch64
    nosrc x86_64)
    * kernel-default-5.3.18-150200.24.166.1
    * kernel-preempt-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS 15-SP2 (aarch64
    x86_64)
    * kernel-obs-build-debugsource-5.3.18-150200.24.166.1
    * kernel-preempt-debugsource-5.3.18-150200.24.166.1
    * kernel-preempt-devel-debuginfo-5.3.18-150200.24.166.1
    * kernel-syms-5.3.18-150200.24.166.1
    * kernel-default-devel-5.3.18-150200.24.166.1
    * kernel-default-devel-debuginfo-5.3.18-150200.24.166.1
    * kernel-default-debuginfo-5.3.18-150200.24.166.1
    * kernel-preempt-devel-5.3.18-150200.24.166.1
    * kernel-default-base-5.3.18-150200.24.166.1.150200.9.83.1
    * kernel-obs-build-5.3.18-150200.24.166.1
    * kernel-default-debugsource-5.3.18-150200.24.166.1
    * kernel-preempt-debuginfo-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS 15-SP2 (noarch)
    * kernel-source-5.3.18-150200.24.166.1
    * kernel-devel-5.3.18-150200.24.166.1
    * kernel-macros-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS 15-SP2 (noarch
    nosrc)
    * kernel-docs-5.3.18-150200.24.166.2
  * SUSE Linux Enterprise Server 15 SP2 LTSS 15-SP2 (aarch64 ppc64le s390x
    x86_64 nosrc)
    * kernel-default-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise Server 15 SP2 LTSS 15-SP2 (aarch64 ppc64le s390x
    x86_64)
    * reiserfs-kmp-default-debuginfo-5.3.18-150200.24.166.1
    * kernel-obs-build-debugsource-5.3.18-150200.24.166.1
    * reiserfs-kmp-default-5.3.18-150200.24.166.1
    * kernel-syms-5.3.18-150200.24.166.1
    * kernel-default-devel-5.3.18-150200.24.166.1
    * kernel-default-devel-debuginfo-5.3.18-150200.24.166.1
    * kernel-default-debuginfo-5.3.18-150200.24.166.1
    * kernel-default-base-5.3.18-150200.24.166.1.150200.9.83.1
    * kernel-obs-build-5.3.18-150200.24.166.1
    * kernel-default-debugsource-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise Server 15 SP2 LTSS 15-SP2 (noarch)
    * kernel-source-5.3.18-150200.24.166.1
    * kernel-devel-5.3.18-150200.24.166.1
    * kernel-macros-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise Server 15 SP2 LTSS 15-SP2 (noarch nosrc)
    * kernel-docs-5.3.18-150200.24.166.2
  * SUSE Linux Enterprise Server 15 SP2 LTSS 15-SP2 (aarch64 nosrc x86_64)
    * kernel-preempt-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise Server 15 SP2 LTSS 15-SP2 (aarch64 x86_64)
    * kernel-preempt-devel-5.3.18-150200.24.166.1
    * kernel-preempt-debugsource-5.3.18-150200.24.166.1
    * kernel-preempt-debuginfo-5.3.18-150200.24.166.1
    * kernel-preempt-devel-debuginfo-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP2 (nosrc ppc64le
    x86_64)
    * kernel-default-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP2 (ppc64le x86_64)
    * reiserfs-kmp-default-debuginfo-5.3.18-150200.24.166.1
    * kernel-obs-build-debugsource-5.3.18-150200.24.166.1
    * reiserfs-kmp-default-5.3.18-150200.24.166.1
    * kernel-syms-5.3.18-150200.24.166.1
    * kernel-default-devel-5.3.18-150200.24.166.1
    * kernel-default-devel-debuginfo-5.3.18-150200.24.166.1
    * kernel-default-debuginfo-5.3.18-150200.24.166.1
    * kernel-default-base-5.3.18-150200.24.166.1.150200.9.83.1
    * kernel-obs-build-5.3.18-150200.24.166.1
    * kernel-default-debugsource-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP2 (noarch)
    * kernel-source-5.3.18-150200.24.166.1
    * kernel-devel-5.3.18-150200.24.166.1
    * kernel-macros-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP2 (noarch nosrc)
    * kernel-docs-5.3.18-150200.24.166.2
  * SUSE Linux Enterprise Server for SAP Applications 15 SP2 (nosrc x86_64)
    * kernel-preempt-5.3.18-150200.24.166.1
  * SUSE Linux Enterprise Server for SAP Applications 15 SP2 (x86_64)
    * kernel-preempt-devel-5.3.18-150200.24.166.1
    * kernel-preempt-debugsource-5.3.18-150200.24.166.1
    * kernel-preempt-debuginfo-5.3.18-150200.24.166.1
    * kernel-preempt-devel-debuginfo-5.3.18-150200.24.166.1

## References:

  * https://www.suse.com/security/cve/CVE-2020-36766.html
  * https://www.suse.com/security/cve/CVE-2023-1192.html
  * https://www.suse.com/security/cve/CVE-2023-1206.html
  * https://www.suse.com/security/cve/CVE-2023-1859.html
  * https://www.suse.com/security/cve/CVE-2023-2177.html
  * https://www.suse.com/security/cve/CVE-2023-23454.html
  * https://www.suse.com/security/cve/CVE-2023-40283.html
  * https://www.suse.com/security/cve/CVE-2023-42753.html
  * https://www.suse.com/security/cve/CVE-2023-4389.html
  * https://www.suse.com/security/cve/CVE-2023-4622.html
  * https://www.suse.com/security/cve/CVE-2023-4623.html
  * https://www.suse.com/security/cve/CVE-2023-4881.html
  * https://www.suse.com/security/cve/CVE-2023-4921.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1207036
  * https://bugzilla.suse.com/show_bug.cgi?id=1208995
  * https://bugzilla.suse.com/show_bug.cgi?id=1210169
  * https://bugzilla.suse.com/show_bug.cgi?id=1210643
  * https://bugzilla.suse.com/show_bug.cgi?id=1212703
  * https://bugzilla.suse.com/show_bug.cgi?id=1214233
  * https://bugzilla.suse.com/show_bug.cgi?id=1214351
  * https://bugzilla.suse.com/show_bug.cgi?id=1214380
  * https://bugzilla.suse.com/show_bug.cgi?id=1214386
  * https://bugzilla.suse.com/show_bug.cgi?id=1215115
  * https://bugzilla.suse.com/show_bug.cgi?id=1215117
  * https://bugzilla.suse.com/show_bug.cgi?id=1215150
  * https://bugzilla.suse.com/show_bug.cgi?id=1215221
  * https://bugzilla.suse.com/show_bug.cgi?id=1215275
  * https://bugzilla.suse.com/show_bug.cgi?id=1215299