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Vulnerability · Published Oct 18, 2026 · Assigned by Linux

CVE-2026-98720KVM: nVMX: Force MSR bitmap refresh if runtime eVMCS controls are modified

Unrated

In plain English

A security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 93.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Force MSR bitmap refresh if runtime eVMCS controls are modified Force a refresh of the vmcs02 MSR bitmap during nested VM-Enter if the runtime eVMCS controls (pin, primary, secondary, etc.) are being updated. If L1 isn't intercepting TPR writes, runs L2 with TPR virtualization, and then runs the same L2 with TPR virtualization disabled, KVM will fail to refresh msr_bitmap02 and leave TPR in passthrough mode even though TPR virtualization is disabled. I.e. failure to refresh the bitmap lets L2 (or L1 by proxy) read and write L0's TPR.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-98720
Debian:13linux6.12.113-1DEBIAN-CVE-2026-98720
Debian:14linux7.2.10-1DEBIAN-CVE-2026-98720
Debian:12linux-6.126.12.113-1~deb12u1DEBIAN-CVE-2026-98720
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98720
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-98720
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-98720
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-98720

Affected products (as reported)

VendorProductVersions
Linux Linux 502d2bf5f2fd7c05adc2d4f057910bd5d4c4c63e – before 2db11598b59f16ddb6420693f9a4ac4efc3d4789502d2bf5f2fd7c05adc2d4f057910bd5d4c4c63e – before f6189e26d0237e47e2f04f9cb1e43fd19a9b2f3a502d2bf5f2fd7c05adc2d4f057910bd5d4c4c63e – before 1e497e3bdab6983deb68a1d26b488027deb4527f502d2bf5f2fd7c05adc2d4f057910bd5d4c4c63e – before 2abb25273c82061dd4670690c81c319c03740bf6
Linux Linux 5.17

References