CVE-2026-98716

KVM: SVM: Use the active VMCB's MSR bitmap when checking if MSR is intercepted

N/A
Published: October 18, 2026 at 03:46 PM UTC
Updated: October 21, 2026 at 01:21 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
N/A
Exploit prediction
EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

3.16.574.164.4.16889be8950bab799ddb9cc3777345e3c21bcb32dbab2ac58f90540e39324e7a29a7ad471407ae0bf48f54d0bb8487d2f016fbc4f0e38ef9098f8eb8bd4
Vendor states this is fixed in 6.12.113 (unaffected)
Vendor states this is fixed in 6.18.56 (unaffected)
Vendor states this is fixed in 6.6.160 (unaffected)
Vendor states this is fixed in 7.2.10 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

Quick Info

StatusRECEIVED

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