==========================================================================
Ubuntu Security Notice USN-6283-1
August 11, 2023

linux, linux-aws, linux-azure, linux-gcp, linux-ibm, linux-kvm,
linux-lowlatency, linux-oracle, linux-raspi vulnerabilities
==========================================================================

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

- Ubuntu 23.04

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-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-kvm: Linux kernel for cloud environments
- linux-lowlatency: Linux low latency kernel
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems

Details:

Ruihan Li discovered that the bluetooth subsystem in the Linux kernel did
not properly perform permissions checks when handling HCI sockets. A
physically proximate attacker could use this to cause a denial of service
(bluetooth communication). (CVE-2023-2002)

Zheng Zhang discovered that the device-mapper implementation in the Linux
kernel did not properly handle locking during table_clear() operations. A
local attacker could use this to cause a denial of service (kernel
deadlock). (CVE-2023-2269)

It was discovered that the Ricoh R5C592 MemoryStick card reader driver in
the Linux kernel contained a race condition during module unload, 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-2023-3141)

Quentin Minster discovered that the KSMBD implementation in the Linux
kernel did not properly validate pointers in some situations, leading to a
null pointer dereference vulnerability. A remote attacker could use this to
cause a denial of service (system crash). (CVE-2023-32248)

Quentin Minster discovered that a race condition existed in the KSMBD
implementation in the Linux kernel, 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-2023-32254)

It was discovered that the kernel->user space relay implementation in the
Linux kernel did not properly perform certain buffer calculations, leading
to an out-of-bounds read vulnerability. A local attacker could use this to
cause a denial of service (system crash) or expose sensitive information
(kernel memory). (CVE-2023-3268)

It was discovered that the QCOM CPUFreq HW driver in the Linux kernel on
ARM processors did not properly handle device unbind. A local attacker
could use this to cause a denial of service (system crash). (CVE-2023-3312)

It was discovered that the MediaTek MT7921E (PCIe) WiFi driver in the Linux
kernel contained a use-after-free vulnerability when querying the firmware
features of the device. A local attacker could use this to cause a denial
of service (system crash). (CVE-2023-3317)

It was discovered that the video4linux driver for Philips based TV cards in
the Linux kernel contained a race condition during device removal, leading
to a use-after-free vulnerability. A physically proximate attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2023-35823)

It was discovered that the SDMC DM1105 PCI device driver in the Linux
kernel contained a race condition during device removal, leading to a use-
after-free vulnerability. A physically proximate attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-35824)

It was discovered that the Allwinner Cedar video engine driver in the Linux
kernel contained a race condition during device removal, leading to a use-
after-free vulnerability. A privileged attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-35826)

It was discovered that the Renesas USB controller driver in the Linux
kernel contained a race condition during device removal, leading to a use-
after-free vulnerability. A privileged attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-35828)

It was discovered that the Rockchip Video Decoder IP driver in the Linux
kernel contained a race condition during device removal, leading to a use-
after-free vulnerability. A privileged attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-35829)

Update instructions:

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

Ubuntu 23.04:
   linux-image-6.2.0-1007-ibm      6.2.0-1007.7
   linux-image-6.2.0-1009-aws      6.2.0-1009.9
   linux-image-6.2.0-1009-azure    6.2.0-1009.9
   linux-image-6.2.0-1009-oracle   6.2.0-1009.9
   linux-image-6.2.0-1010-kvm      6.2.0-1010.10
   linux-image-6.2.0-1010-lowlatency  6.2.0-1010.10
   linux-image-6.2.0-1010-lowlatency-64k  6.2.0-1010.10
   linux-image-6.2.0-1010-raspi    6.2.0-1010.12
   linux-image-6.2.0-1011-gcp      6.2.0-1011.11
   linux-image-6.2.0-27-generic    6.2.0-27.28
   linux-image-6.2.0-27-generic-64k  6.2.0-27.28
   linux-image-6.2.0-27-generic-lpae  6.2.0-27.28
   linux-image-aws                 6.2.0.1009.10
   linux-image-azure               6.2.0.1009.9
   linux-image-gcp                 6.2.0.1011.11
   linux-image-generic             6.2.0.27.27
   linux-image-generic-64k         6.2.0.27.27
   linux-image-generic-lpae        6.2.0.27.27
   linux-image-ibm                 6.2.0.1007.7
   linux-image-kvm                 6.2.0.1010.10
   linux-image-lowlatency          6.2.0.1010.10
   linux-image-lowlatency-64k      6.2.0.1010.10
   linux-image-oracle              6.2.0.1009.9
   linux-image-raspi               6.2.0.1010.13
   linux-image-raspi-nolpae        6.2.0.1010.13
   linux-image-virtual             6.2.0.27.27

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-6283-1
   CVE-2023-2002, CVE-2023-2269, CVE-2023-3141, CVE-2023-32248,
   CVE-2023-32254, CVE-2023-3268, CVE-2023-3312, CVE-2023-3317,
   CVE-2023-35823, CVE-2023-35824, CVE-2023-35826, CVE-2023-35828,
   CVE-2023-35829

Package Information:
   https://launchpad.net/ubuntu/+source/linux/6.2.0-27.28
   https://launchpad.net/ubuntu/+source/linux-aws/6.2.0-1009.9
   https://launchpad.net/ubuntu/+source/linux-azure/6.2.0-1009.9
   https://launchpad.net/ubuntu/+source/linux-gcp/6.2.0-1011.11
   https://launchpad.net/ubuntu/+source/linux-ibm/6.2.0-1007.7
   https://launchpad.net/ubuntu/+source/linux-kvm/6.2.0-1010.10
   https://launchpad.net/ubuntu/+source/linux-lowlatency/6.2.0-1010.10
   https://launchpad.net/ubuntu/+source/linux-oracle/6.2.0-1009.9
   https://launchpad.net/ubuntu/+source/linux-raspi/6.2.0-1010.12