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Ubuntu 22.04 LTS Kernel Access Issues Identified in USN-8255-1 Alert

ubuntu
Calendar Grey May 7, 2026
Scroller Ubuntu
Discover critical security updates for Ubuntu kernel fixing local privilege escalation issues and enhancing security.
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-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS

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

- linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS

- linux-fips: Linux kernel with FIPS

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

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

- 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-intel-iot-realtime: Linux kernel for Intel IoT Real-time platforms

- linux-intel-iotg: Linux kernel for Intel IoT platforms

- linux-kvm: Linux kernel for cloud environments

- linux-lowlatency: Linux low latency kernel

- linux-nvidia: L...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel local access permission issue

Update Instructions

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

Ubuntu 22.04 LTS
  linux-image-5.15.0-1047-nvidia-tegra-igx  5.15.0-1047.47
  linux-image-5.15.0-1047-nvidia-tegra-igx-rt  5.15.0-1047.47
  linux-image-5.15.0-1058-nvidia-tegra  5.15.0-1058.58
  linux-image-5.15.0-1058-nvidia-tegra-rt  5.15.0-1058.58
  linux-image-5.15.0-1089-gkeop   5.15.0-1089.97
  linux-image-5.15.0-1098-intel-iot-realtime  5.15.0-1098.100
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1098-kvm     5.15.0-1098.103
  linux-image-5.15.0-1100-ibm     5.15.0-1100.103
  linux-image-5.15.0-1101-intel-iotg  5.15.0-1101.107
  linux-image-5.15.0-1101-nvidia  5.15.0-1101.102
  linux-image-5.15.0-1101-nvidia-lowlatency  5.15.0-1101.102
  linux-image-5.15.0-1102-gke     5.15.0-1102.108
  linux-image-5.15.0-1103-oracle  5.15.0-1103.109
  linux-image-5.15.0-1105-realtime  5.15.0-1105.114
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1106-aws     5.15.0-1106.113
  linux-image-5.15.0-1106-aws-64k  5.15.0-1106.113
  linux-image-5.15.0-1106-aws-fips  5.15.0-1106.113+fips1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1106-gcp     5.15.0-1106.115
  linux-image-5.15.0-1106-gcp-fips  5.15.0-1106.115+fips1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1111-azure   5.15.0-1111.120
  linux-image-5.15.0-1111-azure-fips  5.15.0-1111.120+fips1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-177-fips     5.15.0-177.187+fips1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-177-generic  5.15.0-177.187
  linux-image-5.15.0-177-generic-64k  5.15.0-177.187
  linux-image-5.15.0-177-generic-lpae  5.15.0-177.187
  linux-image-5.15.0-177-lowlatency  5.15.0-177.187
  linux-image-5.15.0-177-lowlatency-64k  5.15.0-177.187
  linux-image-aws-5.15            5.15.0.1106.109
  linux-image-aws-64k-5.15        5.15.0.1106.109
  linux-image-aws-64k-lts-22.04   5.15.0.1106.109
  linux-image-aws-fips            5.15.0.1106.102
                                  Available with Ubuntu Pro
  linux-image-aws-fips-5.15       5.15.0.1106.102
                                  Available with Ubuntu Pro
  linux-image-aws-lts-22.04       5.15.0.1106.109
  linux-image-azure-5.15          5.15.0.1111.109
  linux-image-azure-fips          5.15.0.1111.96
                                  Available with Ubuntu Pro
  linux-image-azure-fips-5.15     5.15.0.1111.96
                                  Available with Ubuntu Pro
  linux-image-azure-lts-22.04     5.15.0.1111.109
  linux-image-fips                5.15.0.177.103
                                  Available with Ubuntu Pro
  linux-image-fips-5.15           5.15.0.177.103
                                  Available with Ubuntu Pro
  linux-image-gcp-5.15            5.15.0.1106.102
  linux-image-gcp-fips            5.15.0.1106.96
                                  Available with Ubuntu Pro
  linux-image-gcp-fips-5.15       5.15.0.1106.96
                                  Available with Ubuntu Pro
  linux-image-gcp-lts-22.04       5.15.0.1106.102
  linux-image-generic             5.15.0.177.162
  linux-image-generic-5.15        5.15.0.177.162
  linux-image-generic-64k         5.15.0.177.162
  linux-image-generic-64k-5.15    5.15.0.177.162
  linux-image-generic-lpae        5.15.0.177.162
  linux-image-generic-lpae-5.15   5.15.0.177.162
  linux-image-gke                 5.15.0.1102.101
  linux-image-gke-5.15            5.15.0.1102.101
  linux-image-gkeop               5.15.0.1089.88
  linux-image-gkeop-5.15          5.15.0.1089.88
  linux-image-ibm                 5.15.0.1100.96
  linux-image-ibm-5.15            5.15.0.1100.96
  linux-image-intel-iot-realtime  5.15.0.1098.102
                                  Available with Ubuntu Pro
  linux-image-intel-iot-realtime-5.15  5.15.0.1098.102
                                  Available with Ubuntu Pro
  linux-image-intel-iotg          5.15.0.1101.100
  linux-image-intel-iotg-5.15     5.15.0.1101.100
  linux-image-kvm                 5.15.0.1098.94
  linux-image-kvm-5.15            5.15.0.1098.94
  linux-image-lowlatency          5.15.0.177.149
  linux-image-lowlatency-5.15     5.15.0.177.149
  linux-image-lowlatency-64k      5.15.0.177.149
  linux-image-lowlatency-64k-5.15  5.15.0.177.149
  linux-image-nvidia              5.15.0.1101.101
  linux-image-nvidia-5.15         5.15.0.1101.101
  linux-image-nvidia-lowlatency   5.15.0.1101.101
  linux-image-nvidia-lowlatency-5.15  5.15.0.1101.101
  linux-image-nvidia-tegra        5.15.0.1058.58
  linux-image-nvidia-tegra-5.15   5.15.0.1058.58
  linux-image-nvidia-tegra-igx    5.15.0.1047.49
  linux-image-nvidia-tegra-igx-5.15  5.15.0.1047.49
  linux-image-nvidia-tegra-igx-rt  5.15.0.1047.49
  linux-image-nvidia-tegra-igx-rt-5.15  5.15.0.1047.49
  linux-image-nvidia-tegra-rt     5.15.0.1058.58
  linux-image-nvidia-tegra-rt-5.15  5.15.0.1058.58
  linux-image-oracle-5.15         5.15.0.1103.99
  linux-image-oracle-lts-22.04    5.15.0.1103.99
  linux-image-realtime            5.15.0.1105.109
                                  Available with Ubuntu Pro
  linux-image-realtime-5.15       5.15.0.1105.109
                                  Available with Ubuntu Pro
  linux-image-virtual             5.15.0.177.162
  linux-image-virtual-5.15        5.15.0.177.162

Ubuntu 20.04 LTS
  linux-image-5.15.0-1100-ibm     5.15.0-1100.103~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1101-intel-iotg  5.15.0-1101.107~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-1106-aws     5.15.0-1106.113~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-177-generic  5.15.0-177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-177-generic-64k  5.15.0-177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-177-generic-lpae  5.15.0-177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-177-lowlatency  5.15.0-177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-5.15.0-177-lowlatency-64k  5.15.0-177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-aws                 5.15.0.1106.113~20.04.1
                                  Available with Ubuntu Pro
  linux-image-aws-5.15            5.15.0.1106.113~20.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-5.15        5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-64k-5.15    5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-64k-hwe-20.04  5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-hwe-20.04   5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-lpae-5.15   5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-generic-lpae-hwe-20.04  5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-ibm                 5.15.0.1100.103~20.04.1
                                  Available with Ubuntu Pro
  linux-image-ibm-5.15            5.15.0.1100.103~20.04.1
                                  Available with Ubuntu Pro
  linux-image-intel               5.15.0.1101.107~20.04.1
                                  Available with Ubuntu Pro
  linux-image-intel-iotg          5.15.0.1101.107~20.04.1
                                  Available with Ubuntu Pro
  linux-image-intel-iotg-5.15     5.15.0.1101.107~20.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-5.15     5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-64k-5.15  5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-64k-hwe-20.04  5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-lowlatency-hwe-20.04  5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-oem-20.04           5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-oem-20.04b          5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-oem-20.04c          5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-oem-20.04d          5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-virtual-5.15        5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro
  linux-image-virtual-hwe-20.04   5.15.0.177.187~20.04.1
                                  Available with Ubuntu Pro

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-8255-1

CVE-2023-2640, CVE-2023-32629, CVE-2026-23112, CVE-2026-23273

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8255-1

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel local access permission issue

Package Information

https://launchpad.net/ubuntu/+source/linux/5.15.0-177.187
https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1106.113
https://launchpad.net/ubuntu/+source/linux-aws-fips/5.15.0-1106.113+fips1
https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1111.120
https://launchpad.net/ubuntu/+source/linux-azure-fips/5.15.0-1111.120+fips1
https://launchpad.net/ubuntu/+source/linux-fips/5.15.0-177.187+fips1
https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1106.115
https://launchpad.net/ubuntu/+source/linux-gcp-fips/5.15.0-1106.115+fips1
https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1102.108
https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1089.97
https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1100.103
https://launchpad.net/ubuntu/+source/linux-intel-iot-realtime/5.15.0-1098.100
https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1101.107
https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1098.103
https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-177.187
https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1101.102
https://launchpad.net/ubuntu/+source/linux-nvidia-tegra/5.15.0-1058.58
https://launchpad.net/ubuntu/+source/linux-nvidia-tegra-igx/5.15.0-1047.47
https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1103.109
https://launchpad.net/ubuntu/+source/linux-realtime/5.15.0-1105.114

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