==========================================================================
Ubuntu Security Notice USN-6549-1
December 11, 2023

linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15,
linux-azure-fde, linux-azure-fde-5.15, linux-gcp, linux-gke,
linux-hwe-5.15, linux-ibm, linux-ibm-5.15, linux-kvm, linux-nvidia,
linux-oracle, linux-oracle-5.15, linux-raspi vulnerabilities
==========================================================================

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

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-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke: Linux kernel for Google Container Engine (GKE) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-kvm: Linux kernel for cloud environments
- linux-nvidia: Linux kernel for NVIDIA systems
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems
- linux-azure-fde-5.15: Linux kernel for Microsoft Azure CVM cloud systems
- linux-hwe-5.15: Linux hardware enablement (HWE) kernel
- linux-ibm-5.15: Linux kernel for IBM cloud systems
- linux-oracle-5.15: Linux kernel for Oracle Cloud systems

Details:

It was discovered that the USB subsystem in the Linux kernel contained a
race condition while handling device descriptors in certain situations,
leading to a out-of-bounds read vulnerability. A local attacker could
possibly use this to cause a denial of service (system crash).
(CVE-2023-37453)

Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the
Linux kernel did not properly initialize a policy data structure, leading
to an out-of-bounds vulnerability. A local privileged attacker could use
this to cause a denial of service (system crash) or possibly expose
sensitive information (kernel memory). (CVE-2023-3773)

Lucas Leong discovered that the netfilter subsystem in the Linux kernel did
not properly validate some attributes passed from userspace. A local
attacker could use this to cause a denial of service (system crash) or
possibly expose sensitive information (kernel memory). (CVE-2023-39189)

Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did
not properly validate u32 packets content, leading to an out-of-bounds read
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2023-39192)

Lucas Leong discovered that the netfilter subsystem in the Linux kernel did
not properly validate SCTP data, leading to an out-of-bounds read
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2023-39193)

Lucas Leong discovered that the Netlink Transformation (XFRM) subsystem in
the Linux kernel did not properly handle state filters, leading to an out-
of-bounds read vulnerability. A privileged local attacker could use this to
cause a denial of service (system crash) or possibly expose sensitive
information. (CVE-2023-39194)

It was discovered that a race condition existed in QXL virtual GPU driver
in the Linux kernel, leading to a use after free vulnerability. A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2023-39198)

Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did
not properly handle socket buffers (skb) when performing IP routing in
certain circumstances, leading to a null pointer dereference vulnerability.
A privileged attacker could use this to cause a denial of service (system
crash). (CVE-2023-42754)

Jason Wang discovered that the virtio ring implementation in the Linux
kernel did not properly handle iov buffers in some situations. A local
attacker in a guest VM could use this to cause a denial of service (host
system crash). (CVE-2023-5158)

Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel
did not properly handle queue initialization failures in certain
situations, leading to a use-after-free vulnerability. A remote attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2023-5178)

Budimir Markovic discovered that the perf subsystem in the Linux kernel did
not properly handle event groups, leading to an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-5717)

Update instructions:

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1042-nvidia  5.15.0-1042.42
   linux-image-5.15.0-1042-nvidia-lowlatency  5.15.0-1042.42
   linux-image-5.15.0-1044-ibm     5.15.0-1044.47
   linux-image-5.15.0-1044-raspi   5.15.0-1044.47
   linux-image-5.15.0-1048-gcp     5.15.0-1048.56
   linux-image-5.15.0-1048-gke     5.15.0-1048.53
   linux-image-5.15.0-1048-kvm     5.15.0-1048.53
   linux-image-5.15.0-1049-oracle  5.15.0-1049.55
   linux-image-5.15.0-1051-aws     5.15.0-1051.56
   linux-image-5.15.0-1053-azure   5.15.0-1053.61
   linux-image-5.15.0-1053-azure-fde  5.15.0-1053.61.1
   linux-image-5.15.0-91-generic   5.15.0-91.101
   linux-image-5.15.0-91-generic-64k  5.15.0-91.101
   linux-image-5.15.0-91-generic-lpae  5.15.0-91.101
   linux-image-aws-lts-22.04       5.15.0.1051.50
   linux-image-azure-fde-lts-22.04  5.15.0.1053.61.31
   linux-image-azure-lts-22.04     5.15.0.1053.49
   linux-image-gcp-lts-22.04       5.15.0.1048.44
   linux-image-generic             5.15.0.91.88
   linux-image-generic-64k         5.15.0.91.88
   linux-image-generic-lpae        5.15.0.91.88
   linux-image-gke                 5.15.0.1048.47
   linux-image-gke-5.15            5.15.0.1048.47
   linux-image-ibm                 5.15.0.1044.40
   linux-image-kvm                 5.15.0.1048.44
   linux-image-nvidia              5.15.0.1042.42
   linux-image-nvidia-lowlatency   5.15.0.1042.42
   linux-image-oracle              5.15.0.1049.44
   linux-image-oracle-lts-22.04    5.15.0.1049.44
   linux-image-raspi               5.15.0.1044.42
   linux-image-raspi-nolpae        5.15.0.1044.42
   linux-image-virtual             5.15.0.91.88

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1044-ibm     5.15.0-1044.47~20.04.1
   linux-image-5.15.0-1049-oracle  5.15.0-1049.55~20.04.1
   linux-image-5.15.0-1051-aws     5.15.0-1051.56~20.04.1
   linux-image-5.15.0-1053-azure   5.15.0-1053.61~20.04.1
   linux-image-5.15.0-1053-azure-fde  5.15.0-1053.61~20.04.1.1
   linux-image-5.15.0-91-generic   5.15.0-91.101~20.04.1
   linux-image-5.15.0-91-generic-64k  5.15.0-91.101~20.04.1
   linux-image-5.15.0-91-generic-lpae  5.15.0-91.101~20.04.1
   linux-image-aws                 5.15.0.1051.56~20.04.39
   linux-image-azure               5.15.0.1053.61~20.04.42
   linux-image-azure-cvm           5.15.0.1053.61~20.04.42
   linux-image-azure-fde           5.15.0.1053.61~20.04.1.31
   linux-image-generic-64k-hwe-20.04  5.15.0.91.101~20.04.48
   linux-image-generic-hwe-20.04   5.15.0.91.101~20.04.48
   linux-image-generic-lpae-hwe-20.04  5.15.0.91.101~20.04.48
   linux-image-ibm                 5.15.0.1044.47~20.04.16
   linux-image-oem-20.04           5.15.0.91.101~20.04.48
   linux-image-oem-20.04b          5.15.0.91.101~20.04.48
   linux-image-oem-20.04c          5.15.0.91.101~20.04.48
   linux-image-oem-20.04d          5.15.0.91.101~20.04.48
   linux-image-oracle              5.15.0.1049.55~20.04.1
   linux-image-virtual-hwe-20.04   5.15.0.91.101~20.04.48

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-6549-1
   CVE-2023-37453, CVE-2023-3773, CVE-2023-39189, CVE-2023-39192,
   CVE-2023-39193, CVE-2023-39194, CVE-2023-39198, CVE-2023-42754,
   CVE-2023-5158, CVE-2023-5178, CVE-2023-5717

Package Information:
   https://launchpad.net/ubuntu/+source/linux/5.15.0-91.101
   https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1051.56
   https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1053.61
   https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1053.61.1
   https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1048.56
   https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1048.53
   https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1044.47
   https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1048.53
   https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1042.42
   https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1049.55
   https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1044.47
   https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1051.56~20.04.1
   https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1053.61~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-azure-fde-5.15/5.15.0-1053.61~20.04.1.1
   https://launchpad.net/ubuntu/+source/linux-hwe-5.15/5.15.0-91.101~20.04.1
   https://launchpad.net/ubuntu/+source/linux-ibm-5.15/5.15.0-1044.47~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-oracle-5.15/5.15.0-1049.55~20.04.1