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Ubuntu 18.04 LTS USN-4344-1 Critical: Kernel Denial Of Service Fixes

ubuntu
Calendar Grey April 28, 2020
Dist Ubuntu Esm H88
Numerous vulnerabilities patched in Ubuntu's Linux kernel, delivering essential upgrades for safeguarding the system.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-gke-5.0: Linux kernel for Google Container Engine (GKE) systems

- linux-oem-osp1: Linux kernel for OEM processors

Details:

It was discovered that the Intel Wi-Fi driver in the Linux kernel did not

properly check for errors in some situations. A local attacker could

possibly use this to cause a denial of service (system crash).

(CVE-2019-16234)

It was discovered that the Intel WiMAX 2400 driver in the Linux kernel did

not properly deallocate memory in certain situations. A local attacker

could use this to cause a denial of service (kernel memory exhaustion).

(CVE-2019-19051)

Tristan Madani discovered that the block I/O tracing implementation in the

Linux kernel contained a race condition. A local attacker could use this to

cause a denial of service (system crash) or possibly expose sensitive

information. (CVE-2019-19768)

It was discovered that the vhost net driver in the Linux kernel contained a

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory kernel ubuntu memory exhaustion system crash dos error handling

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-5.0.0-1035-gke      5.0.0-1035.36
  linux-image-5.0.0-1050-oem-osp1  5.0.0-1050.55
  linux-image-gke-5.0             5.0.0.1035.23
  linux-image-oem-osp1            5.0.0.1050.53

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-4344-1

CVE-2019-16234, CVE-2019-19051, CVE-2019-19768, CVE-2020-10942,

CVE-2020-8648, CVE-2020-8992, CVE-2020-9383

Severity
critical
Lowest
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Critical

April 28, 2020

Topics%20covered

Topics Covered

security advisory kernel ubuntu memory exhaustion system crash dos error handling

Package Information

https://launchpad.net/ubuntu/+source/linux-gke-5.0/5.0.0-1035.36
https://launchpad.net/ubuntu/+source/linux-oem-osp1/5.0.0-1050.55

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