1. Ubuntu Security Notices
  2. USN-6724-1

USN-6724-1: Linux kernel vulnerabilities

Publication date

9 April 2024

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

Pratyush Yadav discovered that the Xen network backend implementation in
the Linux kernel did not properly handle zero length data request, leading
to a null pointer dereference vulnerability. An attacker in a guest VM
could possibly use this to cause a denial of service (host domain crash).
(CVE-2023-46838)

It was discovered that the Habana’s AI Processors driver in the Linux
kernel did not properly initialize certain data structures before passing
them to user space. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2023-50431)

It was discovered that the device mapper driver in the Linux kernel did not
properly validate target size during certain memory allocations. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2023-52429,

Pratyush Yadav discovered that the Xen network backend implementation in
the Linux kernel did not properly handle zero length data request, leading
to a null pointer dereference vulnerability. An attacker in a guest VM
could possibly use this to cause a denial of service (host domain crash).
(CVE-2023-46838)

It was discovered that the Habana’s AI Processors driver in the Linux
kernel did not properly initialize certain data structures before passing
them to user space. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2023-50431)

It was discovered that the device mapper driver in the Linux kernel did not
properly validate target size during certain memory allocations. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2023-52429, CVE-2024-23851)

It was discovered that the CIFS network file system implementation in the
Linux kernel did not properly validate certain SMB messages, leading to an
out-of-bounds read vulnerability. An attacker could use this to cause a
denial of service (system crash) or possibly expose sensitive information.
(CVE-2023-6610)

Yang Chaoming discovered that the KSMBD implementation in the Linux kernel
did not properly validate request buffer sizes, leading to an out-of-bounds
read vulnerability. An attacker could use this to cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2024-22705)

Chenyuan Yang discovered that the btrfs file system in the Linux kernel did
not properly handle read operations on newly created subvolumes in certain
conditions. A local attacker could use this to cause a denial of service
(system crash). (CVE-2024-23850)

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:

  • Android drivers;
  • Userspace I/O drivers;
  • F2FS file system;
  • SMB network file system;
  • Networking core

Update instructions

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

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
23.10 mantic linux-image-6.5.0-1011-starfive –  6.5.0-1011.12
linux-image-6.5.0-1013-laptop –  6.5.0-1013.16
linux-image-6.5.0-1017-aws –  6.5.0-1017.17
linux-image-6.5.0-1017-gcp –  6.5.0-1017.17
linux-image-6.5.0-1018-azure –  6.5.0-1018.19
linux-image-6.5.0-1018-azure-fde –  6.5.0-1018.19
linux-image-6.5.0-1020-oracle –  6.5.0-1020.20
linux-image-6.5.0-1020-oracle-64k –  6.5.0-1020.20
linux-image-6.5.0-27-generic –  6.5.0-27.28
linux-image-6.5.0-27-generic-64k –  6.5.0-27.28
linux-image-6.5.0-27-lowlatency –  6.5.0-27.28.1
linux-image-6.5.0-27-lowlatency-64k –  6.5.0-27.28.1
linux-image-aws –  6.5.0.1017.17
linux-image-azure –  6.5.0.1018.22
linux-image-azure-fde –  6.5.0.1018.22
linux-image-gcp –  6.5.0.1017.17
linux-image-generic –  6.5.0.27.27
linux-image-generic-64k –  6.5.0.27.27
linux-image-generic-lpae –  6.5.0.27.27
linux-image-kvm –  6.5.0.27.27
linux-image-laptop-23.10 –  6.5.0.1013.16
linux-image-lowlatency –  6.5.0.27.28.18
linux-image-lowlatency-64k –  6.5.0.27.28.18
linux-image-oracle –  6.5.0.1020.22
linux-image-oracle-64k –  6.5.0.1020.22
linux-image-starfive –  6.5.0.1011.13
linux-image-virtual –  6.5.0.27.27
22.04 jammy linux-image-6.5.0-1011-starfive –  6.5.0-1011.12~22.04.1
linux-image-6.5.0-1017-gcp –  6.5.0-1017.17~22.04.1
linux-image-6.5.0-1018-azure –  6.5.0-1018.19~22.04.2
linux-image-6.5.0-1018-azure-fde –  6.5.0-1018.19~22.04.2
linux-image-6.5.0-1019-oem –  6.5.0-1019.20
linux-image-6.5.0-1020-oracle –  6.5.0-1020.20~22.04.1
linux-image-6.5.0-1020-oracle-64k –  6.5.0-1020.20~22.04.1
linux-image-6.5.0-27-generic –  6.5.0-27.28~22.04.1
linux-image-6.5.0-27-generic-64k –  6.5.0-27.28~22.04.1
linux-image-6.5.0-27-lowlatency –  6.5.0-27.28.1~22.04.1
linux-image-6.5.0-27-lowlatency-64k –  6.5.0-27.28.1~22.04.1
linux-image-azure –  6.5.0.1018.19~22.04.2
linux-image-azure-fde –  6.5.0.1018.19~22.04.2
linux-image-gcp –  6.5.0.1017.17~22.04.1
linux-image-generic-64k-hwe-22.04 –  6.5.0.27.28~22.04.1
linux-image-generic-hwe-22.04 –  6.5.0.27.28~22.04.1
linux-image-lowlatency-64k-hwe-22.04 –  6.5.0.27.28.1~22.04.1
linux-image-lowlatency-hwe-22.04 –  6.5.0.27.28.1~22.04.1
linux-image-oem-22.04 –  6.5.0.1019.21
linux-image-oem-22.04a –  6.5.0.1019.21
linux-image-oem-22.04b –  6.5.0.1019.21
linux-image-oem-22.04c –  6.5.0.1019.21
linux-image-oem-22.04d –  6.5.0.1019.21
linux-image-oracle –  6.5.0.1020.20~22.04.1
linux-image-oracle-64k –  6.5.0.1020.20~22.04.1
linux-image-starfive –  6.5.0.1011.12~22.04.1
linux-image-virtual-hwe-22.04 –  6.5.0.27.28~22.04.1

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References

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