1. Ubuntu Security Notices
  2. USN-6821-4

USN-6821-4: Linux kernel (Azure) vulnerabilities

Publication date

14 June 2024

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-azure-fde - Linux kernel for Microsoft Azure CVM cloud systems

Details

It was discovered that the ATA over Ethernet (AoE) driver in the Linux
kernel contained a race condition, leading to a use-after-free
vulnerability. An attacker could use this to cause a denial of service or
possibly execute arbitrary code. (CVE-2023-6270)

It was discovered that the Atheros 802.11ac wireless driver did not
properly validate certain data structures, leading to a NULL pointer
dereference. An attacker could possibly use this to cause a denial of
service. (CVE-2023-7042)

It was discovered that the HugeTLB file system component of the Linux
Kernel contained a NULL pointer dereference vulnerability. A privileged
attacker could possibly use this to to cause a denial of service.
(CVE-2024-0841)

Yuxuan Hu discovered that the Bluetooth RFCOMM protocol driver in the Linux
Kernel contained a race...

It was discovered that the ATA over Ethernet (AoE) driver in the Linux
kernel contained a race condition, leading to a use-after-free
vulnerability. An attacker could use this to cause a denial of service or
possibly execute arbitrary code. (CVE-2023-6270)

It was discovered that the Atheros 802.11ac wireless driver did not
properly validate certain data structures, leading to a NULL pointer
dereference. An attacker could possibly use this to cause a denial of
service. (CVE-2023-7042)

It was discovered that the HugeTLB file system component of the Linux
Kernel contained a NULL pointer dereference vulnerability. A privileged
attacker could possibly use this to to cause a denial of service.
(CVE-2024-0841)

Yuxuan Hu discovered that the Bluetooth RFCOMM protocol driver in the Linux
Kernel contained a race condition, leading to a NULL pointer dereference.
An attacker could possibly use this to cause a denial of service (system
crash). (CVE-2024-22099)

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:

  • ARM32 architecture;
  • RISC-V architecture;
  • x86 architecture;
  • ACPI drivers;
  • Block layer subsystem;
  • Clock framework and drivers;
  • CPU frequency scaling framework;
  • Cryptographic API;
  • DMA engine subsystem;
  • EFI core;
  • GPU drivers;
  • InfiniBand drivers;
  • IOMMU subsystem;
  • Multiple devices driver;
  • Media drivers;
  • MMC subsystem;
  • Network drivers;
  • NTB driver;
  • NVME drivers;
  • PCI subsystem;
  • MediaTek PM domains;
  • Power supply drivers;
  • SPI subsystem;
  • Media staging drivers;
  • TCM subsystem;
  • USB subsystem;
  • Framebuffer layer;
  • AFS file system;
  • File systems infrastructure;
  • BTRFS file system;
  • EROFS file system;
  • Ext4 file system;
  • F2FS file system;
  • Network file system client;
  • NTFS3 file system;
  • Diskquota system;
  • SMB network file system;
  • BPF subsystem;
  • Netfilter;
  • TLS protocol;
  • io_uring subsystem;
  • Bluetooth subsystem;
  • Memory management;
  • Ethernet bridge;
  • Networking core;
  • HSR network protocol;
  • IPv4 networking;
  • IPv6 networking;
  • L2TP protocol;
  • MAC80211 subsystem;
  • Multipath TCP;
  • Netlink;
  • NET/ROM layer;
  • Packet sockets;
  • RDS protocol;
  • Sun RPC protocol;
  • Unix domain sockets;
  • Wireless networking;
  • USB sound devices

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
22.04 jammy linux-image-5.15.0-1065-azure-fde –  5.15.0-1065.74.1
linux-image-5.15.0-1066-azure –  5.15.0-1066.75
linux-image-azure-fde-lts-22.04 –  5.15.0.1065.74.43
linux-image-azure-lts-22.04 –  5.15.0.1066.64

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References

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