==========================================================================
Ubuntu Security Notice USN-6938-1
July 31, 2024

linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities
==========================================================================

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

- Ubuntu 16.04 LTS
- Ubuntu 14.04 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-kvm: Linux kernel for cloud environments
- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

It was discovered that the device input subsystem in the Linux kernel did
not properly handle the case when an event code falls outside of a bitmap.
A local attacker could use this to cause a denial of service (system
crash). (CVE-2022-48619)

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
in the Linux kernel when modifying certain settings values through debugfs.
A privileged local attacker could use this to cause a denial of service.
(CVE-2024-24857, CVE-2024-24858, CVE-2024-24859)

Chenyuan Yang discovered that the Unsorted Block Images (UBI) flash device
volume management subsystem did not properly validate logical eraseblock
sizes in certain situations. An attacker could possibly use this to cause a
denial of service (system crash). (CVE-2024-25739)

Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
  - GPU drivers;
  - HID subsystem;
  - I2C subsystem;
  - Input Device Drivers (Mouse);
  - MTD block device drivers;
  - Network drivers;
  - TTY drivers;
  - USB subsystem;
  - File systems infrastructure;
  - F2FS file system;
  - SMB network file system;
  - BPF subsystem;
  - B.A.T.M.A.N. meshing protocol;
  - Bluetooth subsystem;
  - IPv4 networking;
  - IPv6 networking;
  - Netfilter;
  - Unix domain sockets;
  - Wireless networking;
(CVE-2024-26901, CVE-2021-46932, CVE-2024-26857, CVE-2024-26882,
CVE-2024-26934, CVE-2023-52449, CVE-2024-35982, CVE-2021-46933,
CVE-2023-52620, CVE-2023-52444, CVE-2024-26923, CVE-2023-52469,
CVE-2024-26886, CVE-2024-36902, CVE-2023-52436, CVE-2024-36016,
CVE-2024-26884, CVE-2021-46960, CVE-2021-47194, CVE-2023-52752,
CVE-2024-27020, CVE-2024-26840, CVE-2024-35997, CVE-2024-35984,
CVE-2024-35978)

Update instructions:

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

Ubuntu 16.04 LTS
  linux-image-4.4.0-1135-kvm      4.4.0-1135.145
                                  Available with Ubuntu Pro
  linux-image-4.4.0-1172-aws      4.4.0-1172.187
                                  Available with Ubuntu Pro
  linux-image-4.4.0-257-generic   4.4.0-257.291
                                  Available with Ubuntu Pro
  linux-image-4.4.0-257-lowlatency  4.4.0-257.291
                                  Available with Ubuntu Pro
  linux-image-aws                 4.4.0.1172.176
                                  Available with Ubuntu Pro
  linux-image-generic             4.4.0.257.263
                                  Available with Ubuntu Pro
  linux-image-generic-lts-xenial  4.4.0.257.263
                                  Available with Ubuntu Pro
  linux-image-kvm                 4.4.0.1135.132
                                  Available with Ubuntu Pro
  linux-image-lowlatency          4.4.0.257.263
                                  Available with Ubuntu Pro
  linux-image-lowlatency-lts-xenial  4.4.0.257.263
                                  Available with Ubuntu Pro
  linux-image-virtual             4.4.0.257.263
                                  Available with Ubuntu Pro
  linux-image-virtual-lts-xenial  4.4.0.257.263
                                  Available with Ubuntu Pro

Ubuntu 14.04 LTS
  linux-image-4.4.0-1134-aws      4.4.0-1134.140
                                  Available with Ubuntu Pro
  linux-image-4.4.0-257-generic   4.4.0-257.291~14.04.1
                                  Available with Ubuntu Pro
  linux-image-4.4.0-257-lowlatency  4.4.0-257.291~14.04.1
                                  Available with Ubuntu Pro
  linux-image-aws                 4.4.0.1134.131
                                  Available with Ubuntu Pro
  linux-image-generic-lts-xenial  4.4.0.257.291~14.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-lts-xenial  4.4.0.257.291~14.04.1
                                  Available with Ubuntu Pro
  linux-image-virtual-lts-xenial  4.4.0.257.291~14.04.1
                                  Available with Ubuntu Pro

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-6938-1
  CVE-2021-46932, CVE-2021-46933, CVE-2021-46960, CVE-2021-47194,
  CVE-2022-48619, CVE-2023-46343, CVE-2023-52436, CVE-2023-52444,
  CVE-2023-52449, CVE-2023-52469, CVE-2023-52620, CVE-2023-52752,
  CVE-2024-24857, CVE-2024-24858, CVE-2024-24859, CVE-2024-25739,
  CVE-2024-26840, CVE-2024-26857, CVE-2024-26882, CVE-2024-26884,
  CVE-2024-26886, CVE-2024-26901, CVE-2024-26923, CVE-2024-26934,
  CVE-2024-27020, CVE-2024-35978, CVE-2024-35982, CVE-2024-35984,
  CVE-2024-35997, CVE-2024-36016, CVE-2024-36902