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Ubuntu 22.04 LTS USN-5633-1 Critical: Kernel DoS and Data Exposure

ubuntu
Calendar Grey September 22, 2022
Dist Ubuntu Esm H88
Numerous significant vulnerabilities within the Linux kernel necessitate patches to avert potential service interruptions and safeguard sensitive information.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

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

- linux-raspi: Linux kernel for Raspberry Pi systems

Details:

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)

Duoming Zhou discovered that race conditions existed in the timer

handling implementation of the Linux kernel's Rose X.25 protocol layer,

resulting in use-after-free vulnerabilities. A local attacker could use

this to cause a denial of service (system crash). (CVE-2022-2318)

Roger Pau Monné discovered that the Xen virtual block driver in the

Linux kernel did not properly initialize memory pa...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory code execution DoS Ubuntu kernel system crash data exposure

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1015-raspi   5.15.0-1015.17
   linux-image-5.15.0-1015-raspi-nolpae  5.15.0-1015.17
   linux-image-5.15.0-1016-gke     5.15.0-1016.19
   linux-image-5.15.0-1018-gcp     5.15.0-1018.24
   linux-image-gcp                 5.15.0.1018.16
   linux-image-gke                 5.15.0.1016.18
   linux-image-gke-5.15            5.15.0.1016.18
   linux-image-raspi               5.15.0.1015.14
   linux-image-raspi-nolpae        5.15.0.1015.14

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-5633-1

CVE-2021-33655, CVE-2022-2318, CVE-2022-26365, CVE-2022-33740,

CVE-2022-33741, CVE-2022-33742, CVE-2022-33743, CVE-2022-33744,

CVE-2022-34494, CVE-2022-34495, CVE-2022-36946

Severity
critical
Lowest
Low
Medium
High
Critical

September 22, 2022

Topics%20covered

Topics Covered

security advisory code execution DoS Ubuntu kernel system crash data exposure

Package Information

https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1018.24
https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1016.19
https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1015.17

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