CVE-2026-98714 KVM: SVM: Update control fields on #VMEXIT if and only if VMRUN succeeded
A flaw in Linux KVM SVM handling could lead to undefined behavior or instability when VMRUN fails, requiring a kernel patch.
- 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-2026-98714?
CVE-2026-98714 is a vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
KVM: SVM: Update control fields on #VMEXIT if and only if VMRUN succeeded
Leave control.erap_ctl and control.clean as-is in the VMCS if VMRUN fails, because as per AMD:
there's no explicit architectural guarantee about the behavior in the presence of VMRUN failures. So the best thing to do would be to assume that if VMRUN fails, the actions requested in the control fields may not have been performed.
Which versions are affected by CVE-2026-98714?
How do I fix CVE-2026-98714?
Apply the vendor's patch.
Is CVE-2026-98714 being exploited?
There is no known exploitation of CVE-2026-98714 in the wild and no public exploit code.
Sources
Also known as AZL-109233, BELL-CVE-2026-98714, DEBIAN-CVE-2026-98714, GHSA-rrqj-3q8v-92j9, UBUNTU-CVE-2026-98714.