CVE-2023-5090 Kernel: kvm: svm: improper check in svm_set_x2apic_msr_interception allows direct access to host x2apic msrs
A flaw in KVM allows guest VMs to access host x2apic MSRs, potentially causing a denial of service on the host system.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-5090?
CVE-2023-5090 is a medium-severity denial of service vulnerability in Linux kernel, published on 6 Nov 2023. 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 KVM. An improper check in svm_set_x2apic_msr_interception() may allow direct access to host x2apic msrs when the guest resets its apic, potentially leading to a denial of service condition.
Weakness: CWE-755
Which versions are affected by CVE-2023-5090?
It affects 2 products.
Products include Linux kernel, Redhat Enterprise Linux.
How do I fix CVE-2023-5090?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-5090 being exploited?
There is no known exploitation of CVE-2023-5090 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-31943, BELL-CVE-2023-5090, DEBIAN-CVE-2023-5090, GHSA-f67c-8m2w-79hm, UBUNTU-CVE-2023-5090.