{"id":"CVE-2026-89931","state":"PUBLISHED","title":"KVM: nVMX: Ensure KVM_REQ_GET_NESTED_STATE_PAGES is cleared on VM-Exit","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nVMX: Ensure KVM_REQ_GET_NESTED_STATE_PAGES is cleared on VM-Exit\n\nAlways check and clear KVM_REQ_GET_NESTED_STATE_PAGES when emulating a\nnested VM-Exit to ensure the request is cleared, even when KVM was built\nwith CONFIG_KVM_HYPERV=n, as KVM subtly relies on the \"check\" to clear\nthe flag and thus avoid double-mapping the vmcs12 pages, e.g. if KVM\nmanages to bail from VM-Enter without processing the request, and then\nemulates VMLAUNCH or VMRESUME.","publishedAt":"2026-09-16T10:32:22.202Z","updatedAt":"2026-10-19T08:55:05.944Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b4f69df0f65e97fec439130a0d0a8b9c7cc02df2","status":"affected","lessThan":"ae190f2439ca30067927077bf570d4c5edf07a0f","versionType":"git"},{"version":"b4f69df0f65e97fec439130a0d0a8b9c7cc02df2","status":"affected","lessThan":"674a3244f07f323f21a106a7bdcaebb6db6a5058","versionType":"git"},{"version":"b4f69df0f65e97fec439130a0d0a8b9c7cc02df2","status":"affected","lessThan":"bbec4adc2f340d85f4a77a9ddcddaa6b1f4639c5","versionType":"git"},{"version":"b4f69df0f65e97fec439130a0d0a8b9c7cc02df2","status":"affected","lessThan":"11722439fb206c88e6f31be54173efa9880b4ccb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kvm/vmx/nested.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kvm/vmx/nested.c"]}],"references":["https://git.kernel.org/stable/c/ae190f2439ca30067927077bf570d4c5edf07a0f","https://git.kernel.org/stable/c/674a3244f07f323f21a106a7bdcaebb6db6a5058","https://git.kernel.org/stable/c/bbec4adc2f340d85f4a77a9ddcddaa6b1f4639c5","https://git.kernel.org/stable/c/11722439fb206c88e6f31be54173efa9880b4ccb"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89931.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89931","state":"PUBLISHED","datePublished":"2026-09-16T10:32:22.202Z","dateUpdated":"2026-10-19T08:55:05.944Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.776Z"},"containers":{"cna":{"title":"KVM: nVMX: Ensure KVM_REQ_GET_NESTED_STATE_PAGES is cleared on VM-Exit","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nVMX: Ensure KVM_REQ_GET_NESTED_STATE_PAGES is cleared on VM-Exit\n\nAlways check and clear KVM_REQ_GET_NESTED_STATE_PAGES when emulating a\nnested VM-Exit to ensure the request is cleared, even when KVM was built\nwith CONFIG_KVM_HYPERV=n, as KVM subtly relies on the \"check\" to clear\nthe flag and thus avoid double-mapping the vmcs12 pages, e.g. if KVM\nmanages to bail from VM-Enter without processing the request, and then\nemulates VMLAUNCH or VMRESUME."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b4f69df0f65e97fec439130a0d0a8b9c7cc02df2","status":"affected","lessThan":"ae190f2439ca30067927077bf570d4c5edf07a0f","versionType":"git"},{"version":"b4f69df0f65e97fec439130a0d0a8b9c7cc02df2","status":"affected","lessThan":"674a3244f07f323f21a106a7bdcaebb6db6a5058","versionType":"git"},{"version":"b4f69df0f65e97fec439130a0d0a8b9c7cc02df2","status":"affected","lessThan":"bbec4adc2f340d85f4a77a9ddcddaa6b1f4639c5","versionType":"git"},{"version":"b4f69df0f65e97fec439130a0d0a8b9c7cc02df2","status":"affected","lessThan":"11722439fb206c88e6f31be54173efa9880b4ccb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kvm/vmx/nested.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/x86/kvm/vmx/nested.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ae190f2439ca30067927077bf570d4c5edf07a0f"},{"url":"https://git.kernel.org/stable/c/674a3244f07f323f21a106a7bdcaebb6db6a5058"},{"url":"https://git.kernel.org/stable/c/bbec4adc2f340d85f4a77a9ddcddaa6b1f4639c5"},{"url":"https://git.kernel.org/stable/c/11722439fb206c88e6f31be54173efa9880b4ccb"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:55:05.944Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}