Packages
- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-gkeop - Linux kernel for Google Container Engine (GKE) systems
- linux-hwe-6.8 - Linux hardware enablement (HWE) kernel
- linux-ibm - Linux kernel for IBM cloud systems
- linux-ibm-6.8 - Linux kernel for IBM cloud systems
- linux-lowlatency - Linux low latency kernel
- linux-lowlatency-hwe-6.8 - Linux low latency kernel
- linux-nvidia - Linux kernel for NVIDIA systems
- linux-nvidia-lowlatency - Linux low latency kernel for NVIDIA 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.
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:
- HSI subsystem;
- Bluetooth subsystem;
- Timer subsystem
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.
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:
- HSI subsystem;
- Bluetooth subsystem;
- Timer subsystem
Update instructions
After a standard system update you need to reboot your computer to make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
Reduce your security exposure
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.
References
Related notices
- USN-7865-1
- USN-7864-1
- USN-7863-1
- USN-7862-1
- USN-7862-2
- USN-7862-3
- USN-7861-2
- USN-7861-3
- USN-7860-1
- USN-7860-2
- USN-7865-1
- USN-7864-1
- USN-7863-1
- USN-7862-1
- USN-7862-2
- USN-7862-3
- USN-7861-2
- USN-7861-3
- USN-7860-1
- USN-7860-2
- USN-7860-3
- USN-7860-4
- USN-7860-5
- USN-7854-1
- USN-7853-1
- USN-7853-2
- USN-7853-3
- USN-7850-1
- USN-7789-1
- USN-7789-2
- USN-7776-1
- USN-7775-1
- USN-7775-2
- USN-7775-3
- USN-7774-1
- USN-7774-2
- USN-7774-3
- USN-7774-4
- USN-7774-5
- USN-7771-1
- USN-7770-1
- USN-7769-1
- USN-7769-2
- USN-7769-3
- USN-7712-1
- USN-7712-2
- USN-7711-1
- USN-7686-1
- USN-7655-1
- USN-7654-1
- USN-7654-2
- USN-7654-3
- USN-7654-4
- USN-7654-5
- USN-7594-1
- USN-7594-2
- USN-7594-3
Have additional questions?