KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation_CVE-2026-43133

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation\n\nCommit cc3ed80ae69f (\"KVM: nSVM: always use vmcb01 to for vmsave/vmload\nof guest state\") made KVM always use vmcb01 for the fields controlled by\nVMSAVE/VMLOAD, but it missed updating the VMLOAD/VMSAVE emulation code\nto always use vmcb01.\n\nAs a result, if VMSAVE/VMLOAD is executed by an L2 guest and is not\nintercepted by L1, KVM will mistakenly use vmcb02. Always use vmcb01\ninstead of the current VMCB.",
    "published": "2026-05-06T11:27:20.882Z",
    "modified": "2026-05-08T12:40:48.030Z",
    "type": "cve",
    "title": "KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/10063e1251c1485034a018236080792ad083dcc5\nhttps://git.kernel.org/stable/c/c3b7015000988ba35ecd5648f4b2283960f00543\nhttps://git.kernel.org/stable/c/3880e331b0b31d0d5d3702b124f6c93539cd478a\nhttps://git.kernel.org/stable/c/fce2fd4a2ca05670a91015aacccf96a1c26268fd\nhttps://git.kernel.org/stable/c/d464cf1ed900d47c85393d40b00017b6adfc2e6c\nhttps://git.kernel.org/stable/c/0004ecb798b30e90d7ebfe74efae2d9423315a64\nhttps://git.kernel.org/stable/c/127ccae2c185f62e6ecb4bf24f9cb307e9b9c619",
    "id": "CVE-2026-43133",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux cc3ed80ae69f454c3d904af9f65394a540099723\nLinux Linux cc3ed80ae69f454c3d904af9f65394a540099723\nLinux Linux cc3ed80ae69f454c3d904af9f65394a540099723\nLinux Linux cc3ed80ae69f454c3d904af9f65394a540099723\nLinux Linux cc3ed80ae69f454c3d904af9f65394a540099723\nLinux Linux cc3ed80ae69f454c3d904af9f65394a540099723\nLinux Linux cc3ed80ae69f454c3d904af9f65394a540099723\nLinux Linux 5.13",
    "sourceHref": "",
    "cvss": {
        "score": 7.9,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
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            "attackVector": "",
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            "privilegesRequired": "",
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            "confidentialityImpact": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "cc3ed80ae69f454c3d904af9f65394a540099723",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}