Ubuntu 22.04 LTS USN-6044-1 Moderate: Kernel Elevation Privileges

ubuntu

April 26, 2023

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-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

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

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

- linux-ibm: Linux kernel for IBM cloud systems

- linux-lowlatency: Linux low latency kernel

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems

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

- linux-hwe-5.15: Linux hardware enablement (HWE) kernel

- linux-lowlatency-hwe-5.15: Linux low latency kernel

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

Details:

It was discovered that the Traffic-Control Index (TCINDEX) implementation

in the Linux kernel did not properly perform filter deactivation i...

Read the Full Advisory

Topics Covered

security advisory denial service kernel fix system update ubuntu elevation privileges aws kernel

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1019-gkeop   5.15.0-1019.24
   linux-image-5.15.0-1029-ibm     5.15.0-1029.32
   linux-image-5.15.0-1032-gke     5.15.0-1032.37
   linux-image-5.15.0-1034-oracle  5.15.0-1034.40
   linux-image-5.15.0-1035-aws     5.15.0-1035.39
   linux-image-5.15.0-1037-azure   5.15.0-1037.44
   linux-image-5.15.0-71-generic   5.15.0-71.78
   linux-image-5.15.0-71-generic-64k  5.15.0-71.78
   linux-image-5.15.0-71-generic-lpae  5.15.0-71.78
   linux-image-5.15.0-71-lowlatency  5.15.0-71.78
   linux-image-5.15.0-71-lowlatency-64k  5.15.0-71.78
   linux-image-aws-lts-22.04       5.15.0.1035.34
   linux-image-azure               5.15.0.1037.33
   linux-image-azure-lts-22.04     5.15.0.1037.33
   linux-image-generic             5.15.0.71.69
   linux-image-generic-64k         5.15.0.71.69
   linux-image-generic-lpae        5.15.0.71.69
   linux-image-gke                 5.15.0.1032.31
   linux-image-gke-5.15            5.15.0.1032.31
   linux-image-gkeop               5.15.0.1019.18
   linux-image-gkeop-5.15          5.15.0.1019.18
   linux-image-ibm                 5.15.0.1029.25
   linux-image-lowlatency          5.15.0.71.76
   linux-image-lowlatency-64k      5.15.0.71.76
   linux-image-oracle              5.15.0.1034.29
   linux-image-virtual             5.15.0.71.69

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1032-gke     5.15.0-1032.37~20.04.1
   linux-image-5.15.0-1034-oracle  5.15.0-1034.40~20.04.1
   linux-image-5.15.0-1035-aws     5.15.0-1035.39~20.04.1
   linux-image-5.15.0-71-generic   5.15.0-71.78~20.04.1
   linux-image-5.15.0-71-generic-64k  5.15.0-71.78~20.04.1
   linux-image-5.15.0-71-generic-lpae  5.15.0-71.78~20.04.1
   linux-image-5.15.0-71-lowlatency  5.15.0-71.78~20.04.1
   linux-image-5.15.0-71-lowlatency-64k  5.15.0-71.78~20.04.1
   linux-image-aws                 5.15.0.1035.39~20.04.24
   linux-image-generic-64k-hwe-20.04  5.15.0.71.78~20.04.32
   linux-image-generic-hwe-20.04   5.15.0.71.78~20.04.32
   linux-image-generic-lpae-hwe-20.04  5.15.0.71.78~20.04.32
   linux-image-gke-5.15            5.15.0.1032.37~20.04.1
   linux-image-lowlatency-64k-hwe-20.04  5.15.0.71.78~20.04.29
   linux-image-lowlatency-hwe-20.04  5.15.0.71.78~20.04.29
   linux-image-oem-20.04           5.15.0.71.78~20.04.32
   linux-image-oem-20.04b          5.15.0.71.78~20.04.32
   linux-image-oem-20.04c          5.15.0.71.78~20.04.32
   linux-image-oem-20.04d          5.15.0.71.78~20.04.32
   linux-image-oracle              5.15.0.1034.40~20.04.1
   linux-image-virtual-hwe-20.04   5.15.0.71.78~20.04.32

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.