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Ubuntu 22.04 LTS USN-5979-1 Moderate: Kernel HWE Denial of Service Threats

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Calendar Grey March 28, 2023
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Multiple vulnerabilities identified within the Linux kernel necessitate prompt patches for Ubuntu 22.04 LTS to maintain system stability and safeguard against potential threats.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-hwe-5.19: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the KVM VMX implementation in the Linux kernel did

not properly handle indirect branch prediction isolation between L1 and L2

VMs. An attacker in a guest VM could use this to expose sensitive

information from the host OS or other guest VMs. (CVE-2022-2196)

It was discovered that a race condition existed in the Xen network backend

driver in the Linux kernel when handling dropped packets in certain

circumstances. An attacker could use this to cause a denial of service

(kernel deadlock). (CVE-2022-42328, CVE-2022-42329)

Gerald Lee discovered that the USB Gadget file system implementation in the

Linux kernel contained a race condition, leading to a use-after-free

vulnerability in some situations. A local attacker could use this to cause

a denial of service (system crash) or possibly execute arbit...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory moderate denial of service Ubuntu kernel hardware enablement

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.19.0-38-generic   5.19.0-38.39~22.04.1
   linux-image-5.19.0-38-generic-64k  5.19.0-38.39~22.04.1
   linux-image-5.19.0-38-generic-lpae  5.19.0-38.39~22.04.1
   linux-image-generic-64k-hwe-22.04  5.19.0.38.39~22.04.12
   linux-image-generic-hwe-22.04   5.19.0.38.39~22.04.12
   linux-image-generic-lpae-hwe-22.04  5.19.0.38.39~22.04.12
   linux-image-virtual-hwe-22.04   5.19.0.38.39~22.04.12

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.

References

https://ubuntu.com/security/notices/USN-5979-1

CVE-2022-2196, CVE-2022-42328, CVE-2022-42329, CVE-2022-4382,

CVE-2023-0045, CVE-2023-0266, CVE-2023-0469, CVE-2023-1195,

CVE-2023-23559

March 28, 2023

Topics%20covered

Topics Covered

security advisory moderate denial of service Ubuntu kernel hardware enablement

Package Information

https://launchpad.net/ubuntu/+source/linux-hwe-5.19/5.19.0-38.39~22.04.1

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