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Ubuntu 20.04 LTS USN-5589-1 Moderate: Kernel DoS Fixes Available Now

ubuntu
Calendar Grey August 30, 2022
Dist Ubuntu Esm H88
Multiple vulnerabilities have been addressed in the Linux core for Ubuntu. Make sure to upgrade promptly to maintain system integrity and safety.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-raspi: Linux kernel for Raspberry Pi systems

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)

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel fixes

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1069-raspi    5.4.0-1069.79
   linux-image-5.4.0-125-generic   5.4.0-125.141
   linux-image-5.4.0-125-generic-lpae  5.4.0-125.141
   linux-image-5.4.0-125-lowlatency  5.4.0-125.141
   linux-image-generic             5.4.0.125.126
   linux-image-generic-lpae        5.4.0.125.126
   linux-image-lowlatency          5.4.0.125.126
   linux-image-oem                 5.4.0.125.126
   linux-image-oem-osp1            5.4.0.125.126
   linux-image-raspi               5.4.0.1069.102
   linux-image-raspi2              5.4.0.1069.102
   linux-image-virtual             5.4.0.125.126

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-5589-1

CVE-2021-33061, CVE-2021-33656

August 30, 2022

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel fixes

Package Information

https://launchpad.net/ubuntu/+source/linux/5.4.0-125.141
https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1069.79

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