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CVE WatchAug 26, 2026

CVE-2026-43133

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation Commit cc3ed80

CVSS

7.9

High

EPSS

0.1%

p3

KEV

—

Exploit Today

1

0-100

Published: May 6, 2026 · Last modified: Aug 26, 2026 · CWE-628

EPSS · 30d
0.1%EPSS · 30 days0.1%
2026-08-032026-08-31
Technical description

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation Commit cc3ed80ae69f ("KVM: nSVM: always use vmcb01 to for vmsave/vmload of guest state") made KVM always use vmcb01 for the fields controlled by VMSAVE/VMLOAD, but it missed updating the VMLOAD/VMSAVE emulation code to always use vmcb01. As a result, if VMSAVE/VMLOAD is executed by an L2 guest and is not intercepted by L1, KVM will mistakenly use vmcb02. Always use vmcb01 instead of the current VMCB.

Official references
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