{"api_version":"1","generated_at":"2026-05-30T12:18:00+00:00","cve":"CVE-2026-46071","urls":{"html":"https://cve.report/CVE-2026-46071","api":"https://cve.report/api/cve/CVE-2026-46071.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46071","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46071"},"summary":{"title":"KVM: nSVM: Avoid clearing VMCB_LBR in vmcb12","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nSVM: Avoid clearing VMCB_LBR in vmcb12\n\nsvm_copy_lbrs() always marks VMCB_LBR dirty in the destination VMCB.\nHowever, nested_svm_vmexit() uses it to copy LBRs to vmcb12, and\nclearing clean bits in vmcb12 is not architecturally defined.\n\nMove vmcb_mark_dirty() to callers and drop it for vmcb12.\n\nThis also facilitates incoming refactoring that does not pass the entire\nVMCB to svm_copy_lbrs().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-27 14:17:28","updated_at":"2026-05-27 14:48:03"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/a3f0981a5a0e0bd51ad74cc7d9eed32294b24002","name":"https://git.kernel.org/stable/c/a3f0981a5a0e0bd51ad74cc7d9eed32294b24002","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9efe23568806d1cd06f7d146f9b3037b8d585a9f","name":"https://git.kernel.org/stable/c/9efe23568806d1cd06f7d146f9b3037b8d585a9f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b53ab5167a81537777ac780bbd93d32613aa3bda","name":"https://git.kernel.org/stable/c/b53ab5167a81537777ac780bbd93d32613aa3bda","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46071","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46071","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d20c796ca3709801f8a7fa36e8770a3dd8ebd34e a3f0981a5a0e0bd51ad74cc7d9eed32294b24002 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d20c796ca3709801f8a7fa36e8770a3dd8ebd34e 9efe23568806d1cd06f7d146f9b3037b8d585a9f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d20c796ca3709801f8a7fa36e8770a3dd8ebd34e b53ab5167a81537777ac780bbd93d32613aa3bda git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.27 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.4 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"46071","cve":"CVE-2026-46071","epss":"0.000170000","percentile":"0.043360000","score_date":"2026-05-29","updated_at":"2026-05-30 00:13:24"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/x86/kvm/svm/nested.c","arch/x86/kvm/svm/svm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a3f0981a5a0e0bd51ad74cc7d9eed32294b24002","status":"affected","version":"d20c796ca3709801f8a7fa36e8770a3dd8ebd34e","versionType":"git"},{"lessThan":"9efe23568806d1cd06f7d146f9b3037b8d585a9f","status":"affected","version":"d20c796ca3709801f8a7fa36e8770a3dd8ebd34e","versionType":"git"},{"lessThan":"b53ab5167a81537777ac780bbd93d32613aa3bda","status":"affected","version":"d20c796ca3709801f8a7fa36e8770a3dd8ebd34e","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["arch/x86/kvm/svm/nested.c","arch/x86/kvm/svm/svm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.19"},{"lessThan":"5.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.27","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.27","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.4","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1-rc1","versionStartIncluding":"5.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nSVM: Avoid clearing VMCB_LBR in vmcb12\n\nsvm_copy_lbrs() always marks VMCB_LBR dirty in the destination VMCB.\nHowever, nested_svm_vmexit() uses it to copy LBRs to vmcb12, and\nclearing clean bits in vmcb12 is not architecturally defined.\n\nMove vmcb_mark_dirty() to callers and drop it for vmcb12.\n\nThis also facilitates incoming refactoring that does not pass the entire\nVMCB to svm_copy_lbrs()."}],"providerMetadata":{"dateUpdated":"2026-05-27T12:57:57.316Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a3f0981a5a0e0bd51ad74cc7d9eed32294b24002"},{"url":"https://git.kernel.org/stable/c/9efe23568806d1cd06f7d146f9b3037b8d585a9f"},{"url":"https://git.kernel.org/stable/c/b53ab5167a81537777ac780bbd93d32613aa3bda"}],"title":"KVM: nSVM: Avoid clearing VMCB_LBR in vmcb12","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46071","datePublished":"2026-05-27T12:57:57.316Z","dateReserved":"2026-05-13T15:03:33.095Z","dateUpdated":"2026-05-27T12:57:57.316Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-27 14:17:28","lastModifiedDate":"2026-05-27 14:48:03","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46071","Ordinal":"1","Title":"KVM: nSVM: Avoid clearing VMCB_LBR in vmcb12","CVE":"CVE-2026-46071","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46071","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nSVM: Avoid clearing VMCB_LBR in vmcb12\n\nsvm_copy_lbrs() always marks VMCB_LBR dirty in the destination VMCB.\nHowever, nested_svm_vmexit() uses it to copy LBRs to vmcb12, and\nclearing clean bits in vmcb12 is not architecturally defined.\n\nMove vmcb_mark_dirty() to callers and drop it for vmcb12.\n\nThis also facilitates incoming refactoring that does not pass the entire\nVMCB to svm_copy_lbrs().","Type":"Description","Title":"KVM: nSVM: Avoid clearing VMCB_LBR in vmcb12"}]}}}