Back Linuxsecurity Ubuntu 24.04 LTS USN-7860-2: Linux Kernel Vulnerability CVE-2025
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS Summary: The system could be made to expose sensitive information. Software Description: - linux-realtime-6.14: Linux kernel for Real-time 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.
A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 24.04 LTS Summary: The system could be made to expose sensitive information. Software Description: - linux-realtime-6.14: Linux kernel for Real-time 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.
The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS linux-image-6.14.0-1015-realtime 6.14.0-1015.15~24.04.1 Available with Ubuntu Pro linux-image-realtime-6.14 6.14.0-1015.15~24.04.1 Available with Ubuntu Pro linux-image-realtime-hwe-24.04 6.14.0-1015.15~24.04.1 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.
The problem can be corrected by updating your system to the following package versions: Ubuntu 24.04 LTS linux-image-6.14.0-1015-realtime 6.14.0-1015.15~24.04.1 Available with Ubuntu Pro linux-image-realtime-6.14 6.14.0-1015.15~24.04.1 Available with Ubuntu Pro linux-image-realtime-hwe-24.04 6.14.0-1015.15~24.04.1 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.
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