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Ubuntu 8388-1 Linux Kernel Critical Escalation Issues Fix

ubuntu
Calendar Grey June 4, 2026
Dist Ubuntu Esm H88
Critical security advisory for Ubuntu Linux kernel addresses multiple issues that could lead to privilege escalation and system compromise.
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-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-nvidia: Linux kernel for NVIDIA systems

- linux-nvidia-tegra: Linux kernel for NVIDIA Tegra systems

- linux-nvidia-tegra-igx: Linux kernel for NVIDIA Tegra IGX systems

- linux-oracle: Linux ke...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory critical Ubuntu Linux update Linux kernel escalation

Update Instructions

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

Ubuntu 22.04 LTS
   linux-image-5.15.0-1050-nvidia-tegra-igx  5.15.0-1050.50
   linux-image-5.15.0-1050-nvidia-tegra-igx-rt  5.15.0-1050.50
   linux-image-5.15.0-1061-nvidia-tegra  5.15.0-1061.61
   linux-image-5.15.0-1061-nvidia-tegra-rt  5.15.0-1061.61
   linux-image-5.15.0-1092-gkeop   5.15.0-1092.100
   linux-image-5.15.0-1101-intel-iot-realtime  5.15.0-1101.103
                                   Available with Ubuntu Pro
   linux-image-5.15.0-1101-kvm     5.15.0-1101.106
   linux-image-5.15.0-1103-ibm     5.15.0-1103.106
   linux-image-5.15.0-1103-raspi   5.15.0-1103.106
   linux-image-5.15.0-1104-intel-iotg  5.15.0-1104.110
   linux-image-5.15.0-1104-nvidia  5.15.0-1104.105
   linux-image-5.15.0-1104-nvidia-lowlatency  5.15.0-1104.105
   linux-image-5.15.0-1105-gke     5.15.0-1105.111
   linux-image-5.15.0-1106-oracle  5.15.0-1106.112
   linux-image-5.15.0-1108-realtime  5.15.0-1108.117
                                   Available with Ubuntu Pro
   linux-image-5.15.0-1109-aws     5.15.0-1109.116
   linux-image-5.15.0-1109-aws-64k  5.15.0-1109.116
   linux-image-5.15.0-1109-aws-fips  5.15.0-1109.116+fips1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-1109-gcp     5.15.0-1109.118
   linux-image-5.15.0-1109-gcp-fips  5.15.0-1109.118+fips1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-181-fips     5.15.0-181.191+fips1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-181-generic  5.15.0-181.191
   linux-image-5.15.0-181-generic-64k  5.15.0-181.191
   linux-image-5.15.0-181-generic-lpae  5.15.0-181.191
   linux-image-aws-5.15            5.15.0.1109.112
   linux-image-aws-64k-5.15        5.15.0.1109.112
   linux-image-aws-64k-lts-22.04   5.15.0.1109.112
   linux-image-aws-fips            5.15.0.1109.105
                                   Available with Ubuntu Pro
   linux-image-aws-fips-5.15       5.15.0.1109.105
                                   Available with Ubuntu Pro
   linux-image-aws-lts-22.04       5.15.0.1109.112
   linux-image-fips                5.15.0.181.106
                                   Available with Ubuntu Pro
   linux-image-fips-5.15           5.15.0.181.106
                                   Available with Ubuntu Pro
   linux-image-gcp-5.15            5.15.0.1109.105
   linux-image-gcp-fips            5.15.0.1109.99
                                   Available with Ubuntu Pro
   linux-image-gcp-fips-5.15       5.15.0.1109.99
                                   Available with Ubuntu Pro
   linux-image-gcp-lts-22.04       5.15.0.1109.105
   linux-image-generic             5.15.0.181.164
   linux-image-generic-5.15        5.15.0.181.164
   linux-image-generic-64k         5.15.0.181.164
   linux-image-generic-64k-5.15    5.15.0.181.164
   linux-image-generic-lpae        5.15.0.181.164
   linux-image-generic-lpae-5.15   5.15.0.181.164
   linux-image-gke                 5.15.0.1105.104
   linux-image-gke-5.15            5.15.0.1105.104
   linux-image-gkeop               5.15.0.1092.91
   linux-image-gkeop-5.15          5.15.0.1092.91
   linux-image-ibm                 5.15.0.1103.99
   linux-image-ibm-5.15            5.15.0.1103.99
   linux-image-intel-iot-realtime  5.15.0.1101.105
                                   Available with Ubuntu Pro
   linux-image-intel-iot-realtime-5.15  5.15.0.1101.105
                                   Available with Ubuntu Pro
   linux-image-intel-iotg          5.15.0.1104.103
   linux-image-intel-iotg-5.15     5.15.0.1104.103
   linux-image-kvm                 5.15.0.1101.97
   linux-image-kvm-5.15            5.15.0.1101.97
   linux-image-nvidia              5.15.0.1104.104
   linux-image-nvidia-5.15         5.15.0.1104.104
   linux-image-nvidia-lowlatency   5.15.0.1104.104
   linux-image-nvidia-lowlatency-5.15  5.15.0.1104.104
   linux-image-nvidia-tegra        5.15.0.1061.61
   linux-image-nvidia-tegra-5.15   5.15.0.1061.61
   linux-image-nvidia-tegra-igx    5.15.0.1050.52
   linux-image-nvidia-tegra-igx-5.15  5.15.0.1050.52
   linux-image-nvidia-tegra-igx-rt  5.15.0.1050.52
   linux-image-nvidia-tegra-igx-rt-5.15  5.15.0.1050.52
   linux-image-nvidia-tegra-rt     5.15.0.1061.61
   linux-image-nvidia-tegra-rt-5.15  5.15.0.1061.61
   linux-image-oem-20.04           5.15.0.181.164
   linux-image-oracle-5.15         5.15.0.1106.102
   linux-image-oracle-lts-22.04    5.15.0.1106.102
   linux-image-raspi               5.15.0.1103.101
   linux-image-raspi-5.15          5.15.0.1103.101
   linux-image-raspi-nolpae        5.15.0.1103.101
   linux-image-realtime            5.15.0.1108.112
                                   Available with Ubuntu Pro
   linux-image-realtime-5.15       5.15.0.1108.112
                                   Available with Ubuntu Pro
   linux-image-virtual             5.15.0.181.164
   linux-image-virtual-5.15        5.15.0.181.164

Ubuntu 20.04 LTS
   linux-image-5.15.0-1061-nvidia-tegra  5.15.0-1061.61~20.04.1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-1061-nvidia-tegra-rt  5.15.0-1061.61~20.04.1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-1103-ibm     5.15.0-1103.106~20.04.1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-1109-aws     5.15.0-1109.116~20.04.1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-1109-gcp     5.15.0-1109.118~20.04.1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-181-generic  5.15.0-181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-181-generic-64k  5.15.0-181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-5.15.0-181-generic-lpae  5.15.0-181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-aws                 5.15.0.1109.116~20.04.1
                                   Available with Ubuntu Pro
   linux-image-aws-5.15            5.15.0.1109.116~20.04.1
                                   Available with Ubuntu Pro
   linux-image-gcp                 5.15.0.1109.118~20.04.1
                                   Available with Ubuntu Pro
   linux-image-gcp-5.15            5.15.0.1109.118~20.04.1
                                   Available with Ubuntu Pro
   linux-image-generic-5.15        5.15.0.181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-generic-64k-5.15    5.15.0.181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-generic-64k-hwe-20.04  5.15.0.181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-generic-hwe-20.04   5.15.0.181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-generic-lpae-5.15   5.15.0.181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-generic-lpae-hwe-20.04  5.15.0.181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-ibm                 5.15.0.1103.106~20.04.1
                                   Available with Ubuntu Pro
   linux-image-ibm-5.15            5.15.0.1103.106~20.04.1
                                   Available with Ubuntu Pro
   linux-image-nvidia-tegra        5.15.0.1061.61~20.04.1
                                   Available with Ubuntu Pro
   linux-image-nvidia-tegra-5.15   5.15.0.1061.61~20.04.1
                                   Available with Ubuntu Pro
   linux-image-nvidia-tegra-rt     5.15.0.1061.61~20.04.1
                                   Available with Ubuntu Pro
   linux-image-nvidia-tegra-rt-5.15  5.15.0.1061.61~20.04.1
                                   Available with Ubuntu Pro
   linux-image-oem-20.04           5.15.0.181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-oem-20.04b          5.15.0.181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-oem-20.04c          5.15.0.181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-oem-20.04d          5.15.0.181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-virtual-5.15        5.15.0.181.191~20.04.1
                                   Available with Ubuntu Pro
   linux-image-virtual-hwe-20.04   5.15.0.181.191~20.04.1
                                   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-8388-1

CVE-2026-43284, CVE-2026-43494, CVE-2026-43500, CVE-2026-43503,

CVE-2026-46300, CVE-2026-46333

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8388-1

Topics%20covered

Topics Covered

security advisory critical Ubuntu Linux update Linux kernel escalation

Package Information

https://launchpad.net/ubuntu/+source/linux/5.15.0-181.191
https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1109.116
https://launchpad.net/ubuntu/+source/linux-aws-fips/5.15.0-1109.116+fips1
https://launchpad.net/ubuntu/+source/linux-fips/5.15.0-181.191+fips1
https://launchpad.net/ubuntu/+source/linux-gcp/5.15.0-1109.118
https://launchpad.net/ubuntu/+source/linux-gcp-fips/5.15.0-1109.118+fips1
https://launchpad.net/ubuntu/+source/linux-gke/5.15.0-1105.111
https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1092.100
https://launchpad.net/ubuntu/+source/linux-ibm/5.15.0-1103.106
https://launchpad.net/ubuntu/+source/linux-intel-iot-realtime/5.15.0-1101.103
https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1104.110
https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1101.106
https://launchpad.net/ubuntu/+source/linux-nvidia/5.15.0-1104.105
https://launchpad.net/ubuntu/+source/linux-nvidia-tegra/5.15.0-1061.61
https://launchpad.net/ubuntu/+source/linux-nvidia-tegra-igx/5.15.0-1050.50
https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1106.112
https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1103.106
https://launchpad.net/ubuntu/+source/linux-realtime/5.15.0-1108.117

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