UnratedFix available
KVM: SVM: Use the active VMCB's MSR bitmap when checking if MSR is intercepted
Type: advisorySources: OSV
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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.273, 5.15.224, 6.1.191, 6.12.113, 6.18.56, 6.6.160, 7.2.10
- CVEs
- CVE-2026-98716
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 15:24 UTC · Revision 1
Source evidence
KVM: SVM: Use the active VMCB's MSR bitmap when checking if MSR is intercepted
core-osv · Original sourcePublished 18 Oct 2026, 15:46 UTC
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.
osv:CVE-2026-98716
Kernel
Fixed versions: 5.10.273, 5.15.224, 6.1.191, 6.6.160, 6.12.113, 6.18.56, 7.2.10
Complete source record
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"title": "KVM: SVM: Use the active VMCB's MSR bitmap when checking if MSR is intercepted",
"summary": "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.",
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"modified": "2026-11-01T02:30:51.759650153Z",
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"references": [
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