1. Ubuntu Security Notices
  2. USN-6956-1

USN-6956-1: Linux kernel (Azure) vulnerabilities

Publication date

12 August 2024

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

Benedict Schlüter, Supraja Sridhara, Andrin Bertschi, and Shweta Shinde
discovered that an untrusted hypervisor could inject malicious #VC
interrupts and compromise the security guarantees of AMD SEV-SNP. This flaw
is known as WeSee. A local attacker in control of the hypervisor could use
this to expose sensitive information or possibly execute arbitrary code in
the trusted execution environment. (CVE-2024-25742)

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;
  • ARM64 architecture;
  • Block layer subsystem;
  • Bluetooth drivers;
  • Clock framework and drivers;
  • FireWire subsystem;
  • GPU drivers;
  • InfiniBand drivers;
  • Multiple devices driver;
  • EEPROM drivers;
  • Network...

Benedict Schlüter, Supraja Sridhara, Andrin Bertschi, and Shweta Shinde
discovered that an untrusted hypervisor could inject malicious #VC
interrupts and compromise the security guarantees of AMD SEV-SNP. This flaw
is known as WeSee. A local attacker in control of the hypervisor could use
this to expose sensitive information or possibly execute arbitrary code in
the trusted execution environment. (CVE-2024-25742)

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;
  • ARM64 architecture;
  • Block layer subsystem;
  • Bluetooth drivers;
  • Clock framework and drivers;
  • FireWire subsystem;
  • GPU drivers;
  • InfiniBand drivers;
  • Multiple devices driver;
  • EEPROM drivers;
  • Network drivers;
  • Pin controllers subsystem;
  • Remote Processor subsystem;
  • S/390 drivers;
  • SCSI drivers;
  • TTY drivers;
  • 9P distributed file system;
  • Network file system client;
  • SMB network file system;
  • Socket messages infrastructure;
  • Dynamic debug library;
  • Bluetooth subsystem;
  • Networking core;
  • IPv4 networking;
  • IPv6 networking;
  • Multipath TCP;
  • Netfilter;
  • NSH protocol;
  • Phonet protocol;
  • TIPC protocol;
  • Wireless networking;
  • Key management;
  • ALSA framework;
  • HD-audio driver

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-5.15.0-1070-azure –  5.15.0-1070.79
linux-image-5.15.0-1070-azure-fde –  5.15.0-1070.79.1
linux-image-azure-fde-lts-22.04 –  5.15.0.1070.79.47
linux-image-azure-lts-22.04 –  5.15.0.1070.68
20.04 focal linux-image-5.15.0-1070-azure –  5.15.0-1070.79~20.04.1
linux-image-5.15.0-1070-azure-fde –  5.15.0-1070.79~20.04.1.1
linux-image-azure –  5.15.0.1070.79~20.04.1
linux-image-azure-cvm –  5.15.0.1070.79~20.04.1
linux-image-azure-fde –  5.15.0.1070.79~20.04.1.47

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References

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