Ubuntu 22.04 LTS: USN-6090-1 Critical: Kernel Denial Of Service

ubuntu

May 18, 2023

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

- linux-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems

- linux-gke-5.15: Linux kernel for Google Container Engine (GKE) systems

- linux-oracle-5.15: Linux kernel for Oracle Cloud systems

Details:

It was discovered that some AMD x86-64 processors with SMT enabled could

speculatively execute instructions using a return address from a sibling

thread. A local attacker could possibly use this to expose sensitive

information. (CVE-2022-27672)

Zheng Wang discovered that the Intel i915 graphics driver in the Linux

kernel did not properly handle certain error conditions, leading to a

double-free. A local attacker could possibly use this to cause a denial of

service (system ...

Read the Full Advisory

Topics Covered

security advisory denial of service critical issue Ubuntu kernel system update information exposure

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1020-gkeop   5.15.0-1020.25
   linux-image-5.15.0-1033-gke     5.15.0-1033.38
   linux-image-5.15.0-1034-gcp     5.15.0-1034.42+1
   linux-image-gcp-lts-22.04       5.15.0.1034.30
   linux-image-gke                 5.15.0.1033.32
   linux-image-gke-5.15            5.15.0.1033.32
   linux-image-gkeop               5.15.0.1020.19
   linux-image-gkeop-5.15          5.15.0.1020.19

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1033-gcp     5.15.0-1033.41~20.04.1
   linux-image-5.15.0-1033-gke     5.15.0-1033.38~20.04.1
   linux-image-5.15.0-1035-oracle  5.15.0-1035.41~20.04.1
   linux-image-gcp                 5.15.0.1033.41~20.04.1
   linux-image-gke-5.15            5.15.0.1033.38~20.04.1
   linux-image-oracle              5.15.0.1035.41~20.04.1

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.