CVE-2026-68081KVM: nVMX: Put vmcs12 pages if nested VM-Enter fails due to invalid guest state
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Put vmcs12 pages if nested VM-Enter fails due to invalid guest state Put all vmcs12 pages if KVM synthesizes a nested VM-Exit due to invalid guest while emulating VMLAUNCH or VMRESUME. The invalid guest state path doesn't use nested_vmx_vmexit() as that API is intended to be used if and only if L2 is active, and the open coded equivalent neglects to put the vmcs12 pages. Failure to put the vmcs12 pages leaks any pinned pages (and/or mappings) if L1 retries VMLAUNCH/VMRESUME. Note, the !from_vmenter scenario doesn't suffer the same problem, as vmx_get_nested_state_pages() only gets/pins/maps the vmcs12 pages if L2 is active, i.e. if a "full" VM-Exit is guaranteed before KVM will retry getting vmcs12 pages.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 96c66e87deeeb3cc78a3b82a1de8e365eec206c1 before 7996013b85687034d2e820cef94d6404192e3a3d; 96c66e87deeeb3cc78a3b82a1de8e365eec206c1 builds before 2c87a087c20632d68920272173b5d7c47f9bcf70; 96c66e87deeeb3cc78a3b82a1de8e365eec206c1 builds before 2f2312c422fd2695da772cecb30c69994b795964 | CNA record |
References
- https://git.kernel.org/stable/c/7996013b85687034d2e820cef94d6404192e3a3d
- https://git.kernel.org/stable/c/2c87a087c20632d68920272173b5d7c47f9bcf70
- https://git.kernel.org/stable/c/2f2312c422fd2695da772cecb30c69994b795964
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.