[USN-7860-1] Linux kernel vulnerability
Rodrigo Figueiredo Zaiden
rodrigo.zaiden at canonical.com
Thu Nov 6 10:22:27 UTC 2025
==========================================================================
Ubuntu Security Notice USN-7860-1
November 06, 2025
linux, linux-aws, linux-aws-6.14, linux-gcp, linux-gcp-6.14,
linux-oem-6.14, linux-oracle, linux-oracle-6.14, linux-raspi,
linux-realtime vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 25.04
- Ubuntu 24.04 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-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-realtime: Linux kernel for Real-time systems
- linux-aws-6.14: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp-6.14: Linux kernel for Google Cloud Platform (GCP) systems
- linux-oem-6.14: Linux kernel for OEM systems
- linux-oracle-6.14: Linux kernel for Oracle Cloud systems
Details:
Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered
that the Linux kernel contained insufficient branch predictor isolation
between a guest and a userspace hypervisor for certain processors. This
flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this
to expose sensitive information from the host OS.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 25.04
linux-image-6.14.0-1015-realtime 6.14.0-1015.15
linux-image-6.14.0-1016-aws 6.14.0-1016.16
linux-image-6.14.0-1016-aws-64k 6.14.0-1016.16
linux-image-6.14.0-1016-oracle 6.14.0-1016.16
linux-image-6.14.0-1016-oracle-64k 6.14.0-1016.16
linux-image-6.14.0-1017-raspi 6.14.0-1017.17
linux-image-6.14.0-1019-gcp 6.14.0-1019.20
linux-image-6.14.0-1019-gcp-64k 6.14.0-1019.20
linux-image-6.14.0-35-generic 6.14.0-35.35
linux-image-6.14.0-35-generic-64k 6.14.0-35.35
linux-image-aws 6.14.0-1016.16
linux-image-aws-6.14 6.14.0-1016.16
linux-image-aws-64k 6.14.0-1016.16
linux-image-aws-64k-6.14 6.14.0-1016.16
linux-image-gcp 6.14.0-1019.20
linux-image-gcp-6.14 6.14.0-1019.20
linux-image-gcp-64k 6.14.0-1019.20
linux-image-gcp-64k-6.14 6.14.0-1019.20
linux-image-generic 6.14.0-35.35
linux-image-generic-6.14 6.14.0-35.35
linux-image-generic-64k 6.14.0-35.35
linux-image-generic-64k-6.14 6.14.0-35.35
linux-image-oracle 6.14.0-1016.16
linux-image-oracle-6.14 6.14.0-1016.16
linux-image-oracle-64k 6.14.0-1016.16
linux-image-oracle-64k-6.14 6.14.0-1016.16
linux-image-raspi 6.14.0-1017.17
linux-image-raspi-6.14 6.14.0-1017.17
linux-image-realtime 6.14.0-1015.15
linux-image-realtime-6.14 6.14.0-1015.15
linux-image-virtual 6.14.0-35.35
linux-image-virtual-6.14 6.14.0-35.35
Ubuntu 24.04 LTS
linux-image-6.14.0-1015-oem 6.14.0-1015.15
linux-image-6.14.0-1016-aws 6.14.0-1016.16~24.04.1
linux-image-6.14.0-1016-aws-64k 6.14.0-1016.16~24.04.1
linux-image-6.14.0-1016-oracle 6.14.0-1016.16~24.04.1
linux-image-6.14.0-1016-oracle-64k 6.14.0-1016.16~24.04.1
linux-image-6.14.0-1019-gcp 6.14.0-1019.20~24.04.1
linux-image-6.14.0-1019-gcp-64k 6.14.0-1019.20~24.04.1
linux-image-aws 6.14.0-1016.16~24.04.1
linux-image-aws-6.14 6.14.0-1016.16~24.04.1
linux-image-aws-64k 6.14.0-1016.16~24.04.1
linux-image-aws-64k-6.14 6.14.0-1016.16~24.04.1
linux-image-gcp 6.14.0-1019.20~24.04.1
linux-image-gcp-6.14 6.14.0-1019.20~24.04.1
linux-image-gcp-64k 6.14.0-1019.20~24.04.1
linux-image-gcp-64k-6.14 6.14.0-1019.20~24.04.1
linux-image-oem-24.04 6.14.0-1015.15
linux-image-oem-24.04a 6.14.0-1015.15
linux-image-oem-24.04b 6.14.0-1015.15
linux-image-oem-24.04c 6.14.0-1015.15
linux-image-oem-6.14 6.14.0-1015.15
linux-image-oracle 6.14.0-1016.16~24.04.1
linux-image-oracle-6.14 6.14.0-1016.16~24.04.1
linux-image-oracle-64k 6.14.0-1016.16~24.04.1
linux-image-oracle-64k-6.14 6.14.0-1016.16~24.04.1
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-7860-1
CVE-2025-40300
Package Information:
https://launchpad.net/ubuntu/+source/linux/6.14.0-35.35
https://launchpad.net/ubuntu/+source/linux-aws/6.14.0-1016.16
https://launchpad.net/ubuntu/+source/linux-gcp/6.14.0-1019.20
https://launchpad.net/ubuntu/+source/linux-oracle/6.14.0-1016.16
https://launchpad.net/ubuntu/+source/linux-raspi/6.14.0-1017.17
https://launchpad.net/ubuntu/+source/linux-realtime/6.14.0-1015.15
https://launchpad.net/ubuntu/+source/linux-aws-6.14/6.14.0-1016.16~24.04.1
https://launchpad.net/ubuntu/+source/linux-gcp-6.14/6.14.0-1019.20~24.04.1
https://launchpad.net/ubuntu/+source/linux-oem-6.14/6.14.0-1015.15
https://launchpad.net/ubuntu/+source/linux-oracle-6.14/6.14.0-1016.16~24.04.1
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