CVE-2026-98716
Received
Received - Intake
KVM MSR Interception Vulnerability in Linux Kernel
Vulnerability report for CVE-2026-98716, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-18
Last updated on: 2026-10-18
Assigner: kernel.org
Description
Description
In the Linux kernel, the following vulnerability has been resolved:
KVM: SVM: Use the active VMCB's MSR bitmap when checking if MSR is intercepted
Use the MSR permission bitmap of the active VMCB instead of assuming that
KVM is always using vmcb02's bitmap when L2 is active, as KVM uses msrpm02
if and only if L1 wants to intercept MSR accesses, i.e. if and only if KVM
needs to merge msprm01 with msrpm12.
Don't bother tracking the virtual address of the bitmap that's being used,
as __va() is cheap on x86, and caching the virtual address would introduce
yet another source of potentially stale information.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | b2ac58f90540e39324e7a29a7ad471407ae0bf48 |
| Linux | Linux | b2ac58f90540e39324e7a29a7ad471407ae0bf48 |
| Linux | Linux | b2ac58f90540e39324e7a29a7ad471407ae0bf48 |
| Linux | Linux | b2ac58f90540e39324e7a29a7ad471407ae0bf48 |
| Linux | Linux | f54d0bb8487d2f016fbc4f0e38ef9098f8eb8bd4 |
| Linux | Linux | 89be8950bab799ddb9cc3777345e3c21bcb32dba |
| Linux | Linux | 3.16.57 |
| Linux | Linux | 4.4.168 |
| Linux | Linux | 4.16 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
