1. Ubuntu Security Notices
  2. USN-6918-1

USN-6918-1: Linux kernel vulnerabilities

Publication date

26 July 2024

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

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.

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:

  • ARM64 architecture;
  • RISC-V architecture;
  • S390 architecture;
  • x86 architecture;
  • Block layer subsystem;
  • Compute Acceleration Framework;
  • Accessibility subsystem;
  • Android drivers;
  • Drivers core;
  • Bluetooth drivers;
  • Clock framework and drivers;
  • Data acquisition framework and drivers;
  • Cryptographic API;
  • Buffer Sharing and Synchronization framework;
  • GPU drivers;
  • On-Chip Interconnect management framework;
  • IOMMU...

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.

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:

  • ARM64 architecture;
  • RISC-V architecture;
  • S390 architecture;
  • x86 architecture;
  • Block layer subsystem;
  • Compute Acceleration Framework;
  • Accessibility subsystem;
  • Android drivers;
  • Drivers core;
  • Bluetooth drivers;
  • Clock framework and drivers;
  • Data acquisition framework and drivers;
  • Cryptographic API;
  • Buffer Sharing and Synchronization framework;
  • GPU drivers;
  • On-Chip Interconnect management framework;
  • IOMMU subsystem;
  • Multiple devices driver;
  • Media drivers;
  • VMware VMCI Driver;
  • Network drivers;
  • Microsoft Azure Network Adapter (MANA) driver;
  • Device tree and open firmware driver;
  • Chrome hardware platform drivers;
  • i.MX PM domains;
  • TI SCI PM domains driver;
  • S/390 drivers;
  • SCSI drivers;
  • SPI subsystem;
  • Thermal drivers;
  • TTY drivers;
  • USB subsystem;
  • Framebuffer layer;
  • BTRFS file system;
  • Network file system server daemon;
  • NILFS2 file system;
  • File systems infrastructure;
  • Pstore file system;
  • SMB network file system;
  • BPF subsystem;
  • Bluetooth subsystem;
  • Netfilter;
  • io_uring subsystem;
  • Core kernel;
  • Extra boot config (XBC);
  • Memory management;
  • Amateur Radio drivers;
  • B.A.T.M.A.N. meshing protocol;
  • Ethernet bridge;
  • Networking core;
  • IPv4 networking;
  • IPv6 networking;
  • Multipath TCP;
  • NFC subsystem;
  • RDS protocol;
  • Network traffic control;
  • SMC sockets;
  • Sun RPC protocol;
  • TLS protocol;
  • Unix domain sockets;
  • Wireless networking;
  • eXpress Data Path;
  • SELinux security module

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
24.04 noble linux-image-6.8.0-1008-oracle –  6.8.0-1008.8
linux-image-6.8.0-1008-oracle-64k –  6.8.0-1008.8
linux-image-oracle –  6.8.0-1008.8
linux-image-oracle-64k –  6.8.0-1008.8

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References

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