In the Linux kernel, the following vulnerability has been resolved:
KVM: nVMX: Hide shadow VMCS right after VMCLEAR
free_nested() frees the shadow VMCS while vmcs01 still points to it. But because it is asynchronous with respect to loaded_vmcs_clear(), the vCPU might migrate before the pointer is cleared and __loaded_vmcs_clear() may then execute VMCLEAR.
The VMCS needs to stay attached until its explicit VMCLEAR completes, but then it can be hidden and the page safely freed.
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.12-modules-extraUpgrade bpftool6.12Upgrade kernel6.12Upgrade perf6.12Upgrade kernel6.12-headersUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel-livepatch-6.12.103-127.188Upgrade perf6.12-debuginfoUpgrade kernel6.12-modules-extra-commonUpgrade bpftool6.12-debuginfoUpgrade python3-perf6.12-debuginfoUpgrade kernel6.12-tools-develUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-tools-debuginfoUpgrade kernel6.12-develUpgrade python3-perf6.12Upgrade kernel6.12-debuginfoUpgrade kernel6.12-tools | Sep 1, 2026 | Aug 4, 2026 |
| Debian | — | Upgrade linux-6.12Upgrade linux | Aug 9, 2026 | Aug 9, 2026 |
| Redhat_linux | — | No solution exists | Aug 27, 2026 | Aug 4, 2026 |
| Ubuntu | — | Upgrade linux-image-nvidia-tegraUpgrade linux-image-6.8.0-1035-nvidia-tegraUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-6.8.0-1035-nvidia-tegra-rtUpgrade linux-image-nvidia-tegra-6.8No solution existsUpgrade linux-image-nvidia-tegra-rt-6.8 | Sep 21, 2026 | Sep 18, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 14, 2026 | Aug 4, 2026 |
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