==========================================================================
Ubuntu Security Notice USN-6625-1
February 07, 2024

linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4,
linux-bluefield, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-ibm-5.4,
linux-iot, linux-kvm, linux-oracle, linux-oracle-5.4, linux-xilinx-zynqmp
vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-bluefield: Linux kernel for NVIDIA BlueField platforms
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-iot: Linux kernel for IoT platforms
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors
- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems
- linux-hwe-5.4: Linux hardware enablement (HWE) kernel
- linux-ibm-5.4: Linux kernel for IBM cloud systems
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems

Details:

Marek Marczykowski-Górecki discovered that the Xen event channel
infrastructure implementation in the Linux kernel contained a race
condition. An attacker in a guest VM could possibly use this to cause a
denial of service (paravirtualized device unavailability). (CVE-2023-34324)

Zheng Wang discovered a use-after-free in the Renesas Ethernet AVB driver
in the Linux kernel during device removal. A privileged attacker could use
this to cause a denial of service (system crash). (CVE-2023-35827)

It was discovered that a race condition existed in the Linux kernel when
performing operations with kernel objects, leading to an out-of-bounds
write. A local attacker could use this to cause a denial of service (system
crash) or execute arbitrary code. (CVE-2023-45863)

黄思聪 discovered that the NFC Controller Interface (NCI) implementation in
the Linux kernel did not properly handle certain memory allocation failure
conditions, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2023-46343)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1030-iot      5.4.0-1030.31
   linux-image-5.4.0-1037-xilinx-zynqmp  5.4.0-1037.41
   linux-image-5.4.0-1065-ibm      5.4.0-1065.70
   linux-image-5.4.0-1078-bluefield  5.4.0-1078.84
   linux-image-5.4.0-1085-gkeop    5.4.0-1085.89
   linux-image-5.4.0-1106-kvm      5.4.0-1106.113
   linux-image-5.4.0-1117-oracle   5.4.0-1117.126
   linux-image-5.4.0-1118-aws      5.4.0-1118.128
   linux-image-5.4.0-1123-azure    5.4.0-1123.130
   linux-image-5.4.0-171-generic   5.4.0-171.189
   linux-image-5.4.0-171-generic-lpae  5.4.0-171.189
   linux-image-5.4.0-171-lowlatency  5.4.0-171.189
   linux-image-aws-lts-20.04       5.4.0.1118.115
   linux-image-azure-lts-20.04     5.4.0.1123.116
   linux-image-bluefield           5.4.0.1078.73
   linux-image-generic             5.4.0.171.169
   linux-image-generic-lpae        5.4.0.171.169
   linux-image-gkeop               5.4.0.1085.83
   linux-image-gkeop-5.4           5.4.0.1085.83
   linux-image-ibm-lts-20.04       5.4.0.1065.94
   linux-image-kvm                 5.4.0.1106.102
   linux-image-lowlatency          5.4.0.171.169
   linux-image-oem                 5.4.0.171.169
   linux-image-oem-osp1            5.4.0.171.169
   linux-image-oracle-lts-20.04    5.4.0.1117.110
   linux-image-virtual             5.4.0.171.169
   linux-image-xilinx-zynqmp       5.4.0.1037.37

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   linux-image-5.4.0-1065-ibm      5.4.0-1065.70~18.04.1
   linux-image-5.4.0-1117-oracle   5.4.0-1117.126~18.04.1
   linux-image-5.4.0-1118-aws      5.4.0-1118.128~18.04.1
   linux-image-5.4.0-1123-azure    5.4.0-1123.130~18.04.1
   linux-image-5.4.0-171-generic   5.4.0-171.189~18.04.1
   linux-image-5.4.0-171-lowlatency  5.4.0-171.189~18.04.1
   linux-image-aws                 5.4.0.1118.96
   linux-image-azure               5.4.0.1123.96
   linux-image-generic-hwe-18.04   5.4.0.171.189~18.04.139
   linux-image-ibm                 5.4.0.1065.75
   linux-image-lowlatency-hwe-18.04  5.4.0.171.189~18.04.139
   linux-image-oem                 5.4.0.171.189~18.04.139
   linux-image-oem-osp1            5.4.0.171.189~18.04.139
   linux-image-oracle              5.4.0.1117.126~18.04.89
   linux-image-snapdragon-hwe-18.04  5.4.0.171.189~18.04.139
   linux-image-virtual-hwe-18.04   5.4.0.171.189~18.04.139

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
   https://ubuntu.com/security/notices/USN-6625-1
   CVE-2023-34324, CVE-2023-35827, CVE-2023-45863, CVE-2023-46343

Package Information:
   https://launchpad.net/ubuntu/+source/linux/5.4.0-171.189
   https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1118.128
   https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1123.130
   https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1078.84
   https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1085.89
   https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1065.70
   https://launchpad.net/ubuntu/+source/linux-iot/5.4.0-1030.31
   https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1106.113
   https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1117.126
   https://launchpad.net/ubuntu/+source/linux-xilinx-zynqmp/5.4.0-1037.41