{"api_version":"1","generated_at":"2026-10-21T11:52:29+00:00","cve":"CVE-2026-98637","urls":{"html":"https://cve.report/CVE-2026-98637","api":"https://cve.report/api/cve/CVE-2026-98637.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98637","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98637"},"summary":{"title":"KVM: arm64: Do not clear VM-wide SVE feature on vCPU init failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Do not clear VM-wide SVE feature on vCPU init failure\n\npkvm_vcpu_init_sve() clears KVM_ARM_VCPU_SVE in kvm->arch.vcpu_features\nwhen it fails, but vcpu_has_sve() tests KVM_ARCH_FLAG_GUEST_HAS_SVE,\nwhich is left set. Later vCPUs on that VM then skip the SVE setup and\nregister with a NULL sve_state, which the guest's first FP access hands\nto sve_load_state().\n\nReturn the error without touching vcpu_features.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 16:17:16","updated_at":"2026-10-19 10:19:27"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/a1b3c788ad31837e348075e93dbba3f447492776","name":"https://git.kernel.org/stable/c/a1b3c788ad31837e348075e93dbba3f447492776","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bd46b41f412fb81c50bac1a0929ec31320f3a807","name":"https://git.kernel.org/stable/c/bd46b41f412fb81c50bac1a0929ec31320f3a807","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f0cd8ffae092cc1b9d7cfa9188ed5a88a374adcb","name":"https://git.kernel.org/stable/c/f0cd8ffae092cc1b9d7cfa9188ed5a88a374adcb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98637","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98637","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5db1bef933427aa467ad89c7b695a84a6b4afe16 bd46b41f412fb81c50bac1a0929ec31320f3a807 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5db1bef933427aa467ad89c7b695a84a6b4afe16 f0cd8ffae092cc1b9d7cfa9188ed5a88a374adcb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5db1bef933427aa467ad89c7b695a84a6b4afe16 a1b3c788ad31837e348075e93dbba3f447492776 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.16","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.55 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.9 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/arm64/kvm/hyp/nvhe/pkvm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"bd46b41f412fb81c50bac1a0929ec31320f3a807","status":"affected","version":"5db1bef933427aa467ad89c7b695a84a6b4afe16","versionType":"git"},{"lessThan":"f0cd8ffae092cc1b9d7cfa9188ed5a88a374adcb","status":"affected","version":"5db1bef933427aa467ad89c7b695a84a6b4afe16","versionType":"git"},{"lessThan":"a1b3c788ad31837e348075e93dbba3f447492776","status":"affected","version":"5db1bef933427aa467ad89c7b695a84a6b4afe16","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["arch/arm64/kvm/hyp/nvhe/pkvm.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.16"},{"lessThan":"6.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.55","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.55","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.9","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"6.16","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Do not clear VM-wide SVE feature on vCPU init failure\n\npkvm_vcpu_init_sve() clears KVM_ARM_VCPU_SVE in kvm->arch.vcpu_features\nwhen it fails, but vcpu_has_sve() tests KVM_ARCH_FLAG_GUEST_HAS_SVE,\nwhich is left set. Later vCPUs on that VM then skip the SVE setup and\nregister with a NULL sve_state, which the guest's first FP access hands\nto sve_load_state().\n\nReturn the error without touching vcpu_features."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:23:07.105Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/bd46b41f412fb81c50bac1a0929ec31320f3a807"},{"url":"https://git.kernel.org/stable/c/f0cd8ffae092cc1b9d7cfa9188ed5a88a374adcb"},{"url":"https://git.kernel.org/stable/c/a1b3c788ad31837e348075e93dbba3f447492776"}],"title":"KVM: arm64: Do not clear VM-wide SVE feature on vCPU init failure","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98637","datePublished":"2026-10-18T15:20:08.157Z","dateReserved":"2026-09-25T10:25:14.361Z","dateUpdated":"2026-10-19T09:23:07.105Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 16:17:16","lastModifiedDate":"2026-10-19 10:19:27","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98637","Ordinal":"1","Title":"KVM: arm64: Do not clear VM-wide SVE feature on vCPU init failur","CVE":"CVE-2026-98637","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98637","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Do not clear VM-wide SVE feature on vCPU init failure\n\npkvm_vcpu_init_sve() clears KVM_ARM_VCPU_SVE in kvm->arch.vcpu_features\nwhen it fails, but vcpu_has_sve() tests KVM_ARCH_FLAG_GUEST_HAS_SVE,\nwhich is left set. Later vCPUs on that VM then skip the SVE setup and\nregister with a NULL sve_state, which the guest's first FP access hands\nto sve_load_state().\n\nReturn the error without touching vcpu_features.","Type":"Description","Title":"KVM: arm64: Do not clear VM-wide SVE feature on vCPU init failur"}]}}}