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Ubuntu 22.04 LTS USN-5596-1 Critical: Kernel Denial Of Service

ubuntu
Calendar Grey September 2, 2022
Dist Ubuntu Esm H88
Several vulnerabilities addressed in Ubuntu's Linux kernel pose threats of service disruption and system failures. Urgent update needed.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-5.17: Linux kernel for OEM 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 framebuffer driver on the Linux kernel did

not verify size limits when changing font or screen size, 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-2021-33655)

Topics%20covered

Topics Covered

security advisory denial of service ubuntu kernel issues linux-oem

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.17.0-1016-oem     5.17.0-1016.17
   linux-image-oem-22.04           5.17.0.1016.15
   linux-image-oem-22.04a          5.17.0.1016.15

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-5596-1

CVE-2021-33061, CVE-2021-33655

Severity
critical
Lowest
Low
Medium
High
Critical

September 02, 2022

Topics%20covered

Topics Covered

security advisory denial of service ubuntu kernel issues linux-oem

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.17/5.17.0-1016.17

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