==========================================================================
Ubuntu Security Notice USN-6680-2
March 08, 2024

linux-azure, linux-azure-6.5, linux-hwe-6.5 vulnerabilities
==========================================================================

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

- Ubuntu 23.10
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-azure-6.5: Linux kernel for Microsoft Azure cloud systems
- linux-hwe-6.5: Linux hardware enablement (HWE) kernel

Details:

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)

It was discovered that a race condition existed in the Bluetooth subsystem
of 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-2023-51779)

It was discovered that a race condition existed in the Rose X.25 protocol
implementation 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-2023-51782)

Alon Zahavi discovered that the NVMe-oF/TCP subsystem of the Linux kernel
did not properly handle connect command payloads in certain situations,
leading to an out-of-bounds read vulnerability. A remote attacker could use
this to expose sensitive information (kernel memory). (CVE-2023-6121)

Jann Horn discovered that the io_uring subsystem in the Linux kernel
contained an out-of-bounds access vulnerability. A local attacker could use
this to cause a denial of service (system crash). (CVE-2023-6560)

Dan Carpenter discovered that the netfilter subsystem in the Linux kernel
did not store data in properly sized memory locations. A local user could
use this to cause a denial of service (system crash). (CVE-2024-0607)

Supraja Sridhara, Benedict Schlüter, Mark Kuhne, Andrin Bertschi, and
Shweta Shinde discovered that the Confidential Computing framework in the
Linux kernel for x86 platforms did not properly handle 32-bit emulation on
TDX and SEV. An attacker with access to the VMM could use this to cause a
denial of service (guest crash) or possibly execute arbitrary code.
(CVE-2024-25744)

Update instructions:

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

Ubuntu 23.10:
   linux-image-6.5.0-1016-azure    6.5.0-1016.16
   linux-image-6.5.0-1016-azure-fde  6.5.0-1016.16
   linux-image-azure               6.5.0.1016.18
   linux-image-azure-fde           6.5.0.1016.18

Ubuntu 22.04 LTS:
   linux-image-6.5.0-1016-azure    6.5.0-1016.16~22.04.1
   linux-image-6.5.0-1016-azure-fde  6.5.0-1016.16~22.04.1
   linux-image-6.5.0-25-generic    6.5.0-25.25~22.04.1
   linux-image-6.5.0-25-generic-64k  6.5.0-25.25~22.04.1
   linux-image-azure               6.5.0.1016.16~22.04.1
   linux-image-azure-fde           6.5.0.1016.16~22.04.1
   linux-image-generic-64k-hwe-22.04  6.5.0.25.25~22.04.12
   linux-image-generic-hwe-22.04   6.5.0.25.25~22.04.12
   linux-image-virtual-hwe-22.04   6.5.0.25.25~22.04.12

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-6680-2
   https://ubuntu.com/security/notices/USN-6680-1
   CVE-2023-46343, CVE-2023-51779, CVE-2023-51782, CVE-2023-6121,
   CVE-2023-6560, CVE-2024-0607, CVE-2024-25744

Package Information:
   https://launchpad.net/ubuntu/+source/linux-azure/6.5.0-1016.16
   https://launchpad.net/ubuntu/+source/linux-azure-6.5/6.5.0-1016.16~22.04.1
   https://launchpad.net/ubuntu/+source/linux-hwe-6.5/6.5.0-25.25~22.04.1