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Ubuntu 25.10: Linux Kernel Important Security Threat USN-7906-1

ubuntu
Calendar Grey December 3, 2025
Dist Ubuntu Esm H88
Several critical security fixes in the Linux kernel for Ubuntu 25.10 enhance system integrity and performance.
Several security issues were fixed in the Linux kernel.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 25.10 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-realtime: Linux kernel for Real-time systems Details: Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - x86 architecture; - Cryptographic API; - Android drivers; - TTY drivers; - F2FS file system; - 9P file system network protocol; (CVE-2025-40025, CVE-2025-40026, CVE-2025-40027, CVE-2025-40028, CVE-2025-40108, CVE-2025-40109)

Topics%20covered

Topics Covered

security advisory Ubuntu important linux system compromise Linux kernel

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 linux-image-6.17.0-1003-realtime 6.17.0-1003.4 linux-image-6.17.0-1004-aws 6.17.0-1004.4 linux-image-6.17.0-1004-aws-64k 6.17.0-1004.4 linux-image-6.17.0-7-generic 6.17.0-7.7 linux-image-6.17.0-7-generic-64k 6.17.0-7.7 linux-image-aws 6.17.0-1004.4 linux-image-aws-6.17 6.17.0-1004.4 linux-image-aws-64k 6.17.0-1004.4 linux-image-aws-64k-6.17 6.17.0-1004.4 linux-image-generic 6.17.0-7.7 linux-image-generic-6.17 6.17.0-7.7 linux-image-generic-64k 6.17.0-7.7 linux-image-generic-64k-6.17 6.17.0-7.7 linux-image-generic-64k-hwe-24.04 6.17.0-7.7 linux-image-generic-hwe-24.04 6.17.0-7.7 linux-image-oem-24.04 6.17.0-7.7 linux-image-oem-24.04c 6.17.0-7.7 linux-image-realtime 6.17.0-1003.4 linux-image-realtime-6.17 6.17.0-1003.4 linux-image-realtime-hwe-24.04 6.17.0-1003.4 linux-image-virtual 6.17.0-7.7 linux-image-virtual-6.17 6.17.0-7.7 linux-image-virtual-hwe-24.04 6.17.0-7.7 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-7906-1

CVE-2025-40025, CVE-2025-40026, CVE-2025-40027, CVE-2025-40028,

CVE-2025-40108, CVE-2025-40109

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7906-1

Topics%20covered

Topics Covered

security advisory Ubuntu important linux system compromise Linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/6.17.0-7.7 https://launchpad.net/ubuntu/+source/linux-aws/6.17.0-1004.4 https://launchpad.net/ubuntu/+source/linux-realtime/6.17.0-1003.4

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