=========================================================================Ubuntu Security Notice USN-5600-1
September 05, 2022

linux-hwe-5.4 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-hwe-5.4: Linux hardware enablement (HWE) kernel

Details:

Asaf Modelevsky discovered that the Intel(R) 10GbE PCI Express (ixgbe)
Ethernet driver for the Linux kernel performed insufficient control flow
management. A local attacker could possibly use this to cause a denial 
of service. (CVE-2021-33061)

It was discovered that the virtual terminal driver in the Linux kernel 
did not properly handle VGA console font changes, leading to an 
out-of-bounds write. A local attacker could use this to cause a denial 
of service (system crash) or possibly execute arbitrary code. 
(CVE-2021-33656)

Update instructions:

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

Ubuntu 18.04 LTS:
   linux-image-5.4.0-125-generic   5.4.0-125.141~18.04.1
   linux-image-5.4.0-125-generic-lpae  5.4.0-125.141~18.04.1
   linux-image-5.4.0-125-lowlatency  5.4.0-125.141~18.04.1
   linux-image-generic-hwe-18.04   5.4.0.125.141~18.04.105
   linux-image-generic-lpae-hwe-18.04  5.4.0.125.141~18.04.105
   linux-image-lowlatency-hwe-18.04  5.4.0.125.141~18.04.105
   linux-image-oem                 5.4.0.125.141~18.04.105
   linux-image-oem-osp1            5.4.0.125.141~18.04.105
   linux-image-snapdragon-hwe-18.04  5.4.0.125.141~18.04.105
   linux-image-virtual-hwe-18.04   5.4.0.125.141~18.04.105

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-5600-1
   CVE-2021-33061, CVE-2021-33656

Package Information:
   https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-125.141~18.04.1

Ubuntu 5600-1: Linux kernel (HWE) vulnerabilities

September 5, 2022
Several security issues were fixed in the Linux kernel.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-5.4.0-125-generic 5.4.0-125.141~18.04.1 linux-image-5.4.0-125-generic-lpae 5.4.0-125.141~18.04.1 linux-image-5.4.0-125-lowlatency 5.4.0-125.141~18.04.1 linux-image-generic-hwe-18.04 5.4.0.125.141~18.04.105 linux-image-generic-lpae-hwe-18.04 5.4.0.125.141~18.04.105 linux-image-lowlatency-hwe-18.04 5.4.0.125.141~18.04.105 linux-image-oem 5.4.0.125.141~18.04.105 linux-image-oem-osp1 5.4.0.125.141~18.04.105 linux-image-snapdragon-hwe-18.04 5.4.0.125.141~18.04.105 linux-image-virtual-hwe-18.04 5.4.0.125.141~18.04.105 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-5600-1

CVE-2021-33061, CVE-2021-33656

Severity
September 05, 2022

Package Information

https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-125.141~18.04.1

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