{"id":"CVE-2026-43133","summary":"KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation","details":"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.","modified":"2026-07-01T04:02:30.232921266Z","published":"2026-05-06T11:27:20.882Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43133.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0004ecb798b30e90d7ebfe74efae2d9423315a64"},{"type":"WEB","url":"https://git.kernel.org/stable/c/10063e1251c1485034a018236080792ad083dcc5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/127ccae2c185f62e6ecb4bf24f9cb307e9b9c619"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3880e331b0b31d0d5d3702b124f6c93539cd478a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c3b7015000988ba35ecd5648f4b2283960f00543"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d464cf1ed900d47c85393d40b00017b6adfc2e6c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fce2fd4a2ca05670a91015aacccf96a1c26268fd"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43133.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-43133"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43133.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43133"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2467065"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cc3ed80ae69f454c3d904af9f65394a540099723"},{"fixed":"10063e1251c1485034a018236080792ad083dcc5"},{"fixed":"c3b7015000988ba35ecd5648f4b2283960f00543"},{"fixed":"3880e331b0b31d0d5d3702b124f6c93539cd478a"},{"fixed":"fce2fd4a2ca05670a91015aacccf96a1c26268fd"},{"fixed":"d464cf1ed900d47c85393d40b00017b6adfc2e6c"},{"fixed":"0004ecb798b30e90d7ebfe74efae2d9423315a64"},{"fixed":"127ccae2c185f62e6ecb4bf24f9cb307e9b9c619"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43133.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.13.0"},{"fixed":"5.15.202"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.165"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.128"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.75"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43133.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H"}]}