# Security update for the Linux Kernel

Announcement ID: SUSE-SU-2023:4028-1  
Rating: important  
References:

  * #1208600
  * #1208995
  * #1210448
  * #1213666
  * #1213927
  * #1214348
  * #1214451
  * #1215115
  * PED-4579

  
Cross-References:

  * CVE-2023-1077
  * CVE-2023-1192
  * CVE-2023-2007
  * CVE-2023-20588
  * CVE-2023-3772
  * CVE-2023-4385
  * CVE-2023-4459
  * CVE-2023-4623

  
CVSS scores:

  * CVE-2023-1077 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-1077 ( NVD ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * 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-2023-2007 ( SUSE ):  4.4 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
  * CVE-2023-2007 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-20588 ( SUSE ):  6.0 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
  * CVE-2023-20588 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
  * CVE-2023-3772 ( SUSE ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-3772 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-4385 ( SUSE ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-4385 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-4459 ( SUSE ):  6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-4459 ( NVD ):  6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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

  
Affected Products:

  * SUSE Linux Enterprise Server 11 SP4
  * SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE 11-SP4

  
  
An update that solves eight vulnerabilities and contains one feature can now be
installed.

## Description:

The SUSE Linux Enterprise 11 SP4 kernel was updated to receive various security
and bugfixes.

The following security bugs were fixed:

  * CVE-2023-1077: Fixed a type confusion in pick_next_rt_entity() that could
    cause memory corruption (bsc#1208600).
  * 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-2023-1192: Fixed use-after-free in cifs_demultiplex_thread()
    (bsc#1208995).
  * CVE-2023-20588: Fixed a potential data leak that could be triggered through
    a side channel when division by zero occurred on some AMD processors
    (bsc#1213927).
  * CVE-2023-4459: Fixed a NULL pointer dereference flaw in the vmxnet3 driver
    that may have allowed a local attacker with user privileges to cause a
    denial of service (bsc#1214451).
  * CVE-2023-3772: Fixed a flaw in the XFRM subsystem that may have allowed a
    malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL
    pointer leading to denial of service (bsc#1213666).
  * CVE-2023-2007: Removed the dpt_i2o driver due to security issues
    (bsc#1210448, jsc#PED-4579).
  * CVE-2023-4385: Fixed a NULL pointer dereference flaw in dbFree that may have
    allowed a local attacker to crash the system due to a missing sanity check
    (bsc#1214348).

## 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 Server 11 SP4 LTSS EXTREME CORE 11-SP4  
    zypper in -t patch SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2023-4028=1

  * SUSE Linux Enterprise Server 11 SP4  
    zypper in -t patch SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2023-4028=1

## Package List:

  * SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE 11-SP4 (nosrc x86_64)
    * kernel-xen-3.0.101-108.147.1
    * kernel-trace-3.0.101-108.147.1
    * kernel-default-3.0.101-108.147.1
    * kernel-ec2-3.0.101-108.147.1
  * SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE 11-SP4 (x86_64)
    * kernel-trace-base-3.0.101-108.147.1
    * kernel-ec2-base-3.0.101-108.147.1
    * kernel-ec2-devel-3.0.101-108.147.1
    * kernel-syms-3.0.101-108.147.1
    * kernel-xen-base-3.0.101-108.147.1
    * kernel-trace-devel-3.0.101-108.147.1
    * kernel-xen-devel-3.0.101-108.147.1
    * kernel-source-3.0.101-108.147.1
    * kernel-default-devel-3.0.101-108.147.1
    * kernel-default-base-3.0.101-108.147.1
  * SUSE Linux Enterprise Server 11 SP4 (nosrc x86_64)
    * kernel-xen-3.0.101-108.147.1
    * kernel-trace-3.0.101-108.147.1
    * kernel-default-3.0.101-108.147.1
    * kernel-ec2-3.0.101-108.147.1
  * SUSE Linux Enterprise Server 11 SP4 (x86_64)
    * kernel-trace-base-3.0.101-108.147.1
    * kernel-ec2-base-3.0.101-108.147.1
    * kernel-ec2-devel-3.0.101-108.147.1
    * kernel-syms-3.0.101-108.147.1
    * kernel-xen-base-3.0.101-108.147.1
    * kernel-trace-devel-3.0.101-108.147.1
    * kernel-xen-devel-3.0.101-108.147.1
    * kernel-source-3.0.101-108.147.1
    * kernel-default-devel-3.0.101-108.147.1
    * kernel-default-base-3.0.101-108.147.1

## References:

  * https://www.suse.com/security/cve/CVE-2023-1077.html
  * https://www.suse.com/security/cve/CVE-2023-1192.html
  * https://www.suse.com/security/cve/CVE-2023-2007.html
  * https://www.suse.com/security/cve/CVE-2023-20588.html
  * https://www.suse.com/security/cve/CVE-2023-3772.html
  * https://www.suse.com/security/cve/CVE-2023-4385.html
  * https://www.suse.com/security/cve/CVE-2023-4459.html
  * https://www.suse.com/security/cve/CVE-2023-4623.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1208600
  * https://bugzilla.suse.com/show_bug.cgi?id=1208995
  * https://bugzilla.suse.com/show_bug.cgi?id=1210448
  * https://bugzilla.suse.com/show_bug.cgi?id=1213666
  * https://bugzilla.suse.com/show_bug.cgi?id=1213927
  * https://bugzilla.suse.com/show_bug.cgi?id=1214348
  * https://bugzilla.suse.com/show_bug.cgi?id=1214451
  * https://bugzilla.suse.com/show_bug.cgi?id=1215115
  * https://jira.suse.com/login.jsp