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Ubuntu 22.04 & 20.04 LTS: Critical Kernel Info Disclosure USN-7862-1

ubuntu
Calendar Grey November 6, 2025
Dist Ubuntu Esm H88
Ubuntu 22.04 & 20.04 LTS kernel exposes sensitive data due to insufficient isolation; update recommended.
The system could be made to expose sensitive information.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: The system could be made to expose sensitive information. Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - 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-ibm: Linux kernel for IBM cloud systems - linux-intel-iotg: Linux kernel for Intel IoT platforms - linux-lowlatency: Linux low latency kernel - linux-nvidia: Linux kernel for NVIDIA systems - linux-oracle: Linux kernel for Oracle Cloud systems - linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems - linux-gcp-5.15: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe-5.15: Linux hardware enablement (HWE) kernel - linux-ibm-5.15: Linux kernel ...

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Topics%20covered

Topics Covered

security advisory update critical Ubuntu information disclosure Linux kernel

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS linux-image-5.15.0-1079-gkeop 5.15.0-1079.87 linux-image-5.15.0-1090-ibm 5.15.0-1090.93 linux-image-5.15.0-1091-intel-iotg 5.15.0-1091.97 linux-image-5.15.0-1091-nvidia 5.15.0-1091.92 linux-image-5.15.0-1091-nvidia-lowlatency 5.15.0-1091.92 linux-image-5.15.0-1092-gke 5.15.0-1092.98 linux-image-5.15.0-1093-oracle 5.15.0-1093.99 linux-image-5.15.0-1096-aws 5.15.0-1096.103 linux-image-5.15.0-1096-aws-64k 5.15.0-1096.103 linux-image-5.15.0-1096-gcp 5.15.0-1096.105 linux-image-5.15.0-161-generic 5.15.0-161.171 linux-image-5.15.0-161-generic-64k 5.15.0-161.171 linux-image-5.15.0-161-generic-lpae 5.15.0-161.171 linux-image-5.15.0-161-lowlatency 5.15.0-161.171 linux-image-5.15.0-161-lowlatency-64k 5.15.0-161.171 linux-image-aws-5.15 5.15.0.1096.99 linux-image-aws-64k-5.15 5.15.0.1096.99 linux-image-aws-64k-lts-22.04 5.15.0.1096.99 linux-image-aws-lts-22.04 5.15.0.1096.99 linux-image-gcp-5.15 5.15.0.1096.92 linux-image-gcp-lts-22.04 5.15.0.1096.92 linux-image-generic 5.15.0.161.157 linux-image-generic-5.15 5.15.0.161.157 linux-image-generic-64k 5.15.0.161.157 linux-image-generic-64k-5.15 5.15.0.161.157 linux-image-generic-lpae 5.15.0.161.157 linux-image-generic-lpae-5.15 5.15.0.161.157 linux-image-gke 5.15.0.1092.91 linux-image-gke-5.15 5.15.0.1092.91 linux-image-gkeop 5.15.0.1079.78 linux-image-gkeop-5.15 5.15.0.1079.78 linux-image-ibm 5.15.0.1090.86 linux-image-ibm-5.15 5.15.0.1090.86 linux-image-intel-iotg 5.15.0.1091.91 linux-image-intel-iotg-5.15 5.15.0.1091.91 linux-image-lowlatency 5.15.0.161.139 linux-image-lowlatency-5.15 5.15.0.161.139 linux-image-lowlatency-64k 5.15.0.161.139 linux-image-lowlatency-64k-5.15 5.15.0.161.139 linux-image-nvidia 5.15.0.1091.91 linux-image-nvidia-5.15 5.15.0.1091.91 linux-image-nvidia-lowlatency 5.15.0.1091.91 linux-image-nvidia-lowlatency-5.15 5.15.0.1091.91 linux-image-oracle-5.15 5.15.0.1093.89 linux-image-oracle-lts-22.04 5.15.0.1093.89 linux-image-virtual 5.15.0.161.157 linux-image-virtual-5.15 5.15.0.161.157 Ubuntu 20.04 LTS linux-image-5.15.0-1090-ibm 5.15.0-1090.93~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-1091-intel-iotg 5.15.0-1091.97~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-1093-oracle 5.15.0-1093.99~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-1096-aws 5.15.0-1096.103~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-1096-gcp 5.15.0-1096.105~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-161-generic 5.15.0-161.171~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-161-generic-64k 5.15.0-161.171~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-161-generic-lpae 5.15.0-161.171~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-161-lowlatency 5.15.0-161.171~20.04.1 Available with Ubuntu Pro linux-image-5.15.0-161-lowlatency-64k 5.15.0-161.171~20.04.1 Available with Ubuntu Pro linux-image-aws 5.15.0.1096.103~20.04.1 Available with Ubuntu Pro linux-image-aws-5.15 5.15.0.1096.103~20.04.1 Available with Ubuntu Pro linux-image-gcp 5.15.0.1096.105~20.04.1 Available with Ubuntu Pro linux-image-gcp-5.15 5.15.0.1096.105~20.04.1 Available with Ubuntu Pro linux-image-generic-5.15 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-generic-64k-5.15 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-generic-64k-hwe-20.04 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-generic-hwe-20.04 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-generic-lpae-5.15 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-generic-lpae-hwe-20.04 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-ibm 5.15.0.1090.93~20.04.1 Available with Ubuntu Pro linux-image-ibm-5.15 5.15.0.1090.93~20.04.1 Available with Ubuntu Pro linux-image-intel 5.15.0.1091.97~20.04.1 Available with Ubuntu Pro linux-image-intel-iotg 5.15.0.1091.97~20.04.1 Available with Ubuntu Pro linux-image-intel-iotg-5.15 5.15.0.1091.97~20.04.1 Available with Ubuntu Pro linux-image-lowlatency-5.15 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-lowlatency-64k-5.15 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-lowlatency-64k-hwe-20.04 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-lowlatency-hwe-20.04 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-oem-20.04 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-oem-20.04b 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-oem-20.04c 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-oem-20.04d 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-oracle 5.15.0.1093.99~20.04.1 Available with Ubuntu Pro linux-image-oracle-5.15 5.15.0.1093.99~20.04.1 Available with Ubuntu Pro linux-image-virtual-5.15 5.15.0.161.171~20.04.1 Available with Ubuntu Pro linux-image-virtual-hwe-20.04 5.15.0.161.171~20.04.1 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-7862-1

CVE-2025-40300

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7862-1

Topics%20covered

Topics Covered

security advisory update critical Ubuntu information disclosure Linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1096.103 https://launchpad.net/ubuntu/+source/linux-gkeop/5.15.0-1079.87 https://launchpad.net/ubuntu/+source/linux-lowlatency/5.15.0-161.171

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