CVE-2018-10901 Privilege escalation in kernel:
A flaw in Linux kernel KVM allows local attackers to escalate privileges by exploiting improper GDT limit restoration in VMX code.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-10901?
CVE-2018-10901 is a high-severity vulnerability in Linux kernel, published on 26 Jul 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.
Weakness: CWE-665
Which versions are affected by CVE-2018-10901?
It affects 5 products.
Products include Linux kernel, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Workstation.
How do I fix CVE-2018-10901?
Apply the vendor's patch.
Is CVE-2018-10901 being exploited?
There is no known exploitation of CVE-2018-10901 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as GHSA-8j5h-gvcc-pfhw, UBUNTU-CVE-2018-10901.