CVE-2026-43133

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.

• git.kernel.orghttps://git.kernel.org/stable/c/0004ecb798b30e90d7ebfe74efae2d9423315a64
• git.kernel.orghttps://git.kernel.org/stable/c/10063e1251c1485034a018236080792ad083dcc5
• git.kernel.orghttps://git.kernel.org/stable/c/127ccae2c185f62e6ecb4bf24f9cb307e9b9c619
• git.kernel.orghttps://git.kernel.org/stable/c/3880e331b0b31d0d5d3702b124f6c93539cd478a
• git.kernel.orghttps://git.kernel.org/stable/c/c3b7015000988ba35ecd5648f4b2283960f00543
• git.kernel.orghttps://git.kernel.org/stable/c/d464cf1ed900d47c85393d40b00017b6adfc2e6c
• git.kernel.orghttps://git.kernel.org/stable/c/fce2fd4a2ca05670a91015aacccf96a1c26268fd
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-43133
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2467065
• security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43133.json

No related CVEs by CWE or product.