Ubuntu 22.04 LTS: USN-6923-2 Critical: Kernel Security Flaws

ubuntu

July 30, 2024

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-ibm: Linux kernel for IBM cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems

- linux-ibm-5.15: Linux kernel for IBM cloud systems

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:

- TTY drivers;

- SMB network file system;

- Netfilter;

...

Read the Full Advisory

Topics Covered

security advisory security issue Ubuntu kernel IBM AWS Raspberry Pi

Update Instructions

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

Ubuntu 22.04 LTS
  linux-image-5.15.0-1059-ibm     5.15.0-1059.62
  linux-image-5.15.0-1059-raspi   5.15.0-1059.62
  linux-image-ibm                 5.15.0.1059.55
  linux-image-raspi               5.15.0.1059.57
  linux-image-raspi-nolpae        5.15.0.1059.57

Ubuntu 20.04 LTS
  linux-image-5.15.0-1059-ibm     5.15.0-1059.62~20.04.1
  linux-image-5.15.0-1066-aws     5.15.0-1066.72~20.04.1
  linux-image-aws                 5.15.0.1066.72~20.04.1
  linux-image-ibm                 5.15.0.1059.62~20.04.1

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.