{"api_version":"1","generated_at":"2026-08-29T12:12:23+00:00","cve":"CVE-2026-80665","urls":{"html":"https://cve.report/CVE-2026-80665","api":"https://cve.report/api/cve/CVE-2026-80665.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80665","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80665"},"summary":{"title":"KVM: arm64: nv: Inject SEA if kvm_translate_vncr() can't resolve PFN","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: nv: Inject SEA if kvm_translate_vncr() can't resolve PFN\n\nkvm_handle_vncr_abort() assumes that s1_walk_result conveys an abort\nwhen kvm_translate_vncr() returns -EFAULT. This is not always the case\nas it's possible to encounter 'late' failures on the output of S1\ntranslation, e.g. a GFN outside of the memslots.\n\nFix it by preparing an external abort before returning from\nkvm_translate_vncr(). Get rid of the BUG_ON() in the fault injection\npath while at it.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-28 08:16:51","updated_at":"2026-08-29 07:16:49"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","data":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/4ead4def04659739c399bfcb063f8a906194c79f","name":"https://git.kernel.org/stable/c/4ead4def04659739c399bfcb063f8a906194c79f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/53804b6839573c9c6fff5f4cf075d6746267345e","name":"https://git.kernel.org/stable/c/53804b6839573c9c6fff5f4cf075d6746267345e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9f3e83345a56280efffe235c65593c7e544c0fcc","name":"https://git.kernel.org/stable/c/9f3e83345a56280efffe235c65593c7e544c0fcc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80665","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80665","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a359e072596fcb2e9e85017a865e3618a2fe5b5 4ead4def04659739c399bfcb063f8a906194c79f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a359e072596fcb2e9e85017a865e3618a2fe5b5 53804b6839573c9c6fff5f4cf075d6746267345e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2a359e072596fcb2e9e85017a865e3618a2fe5b5 9f3e83345a56280efffe235c65593c7e544c0fcc 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 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80665","cve":"CVE-2026-80665","epss":"0.001780000","percentile":"0.074260000","score_date":"2026-08-28","updated_at":"2026-08-29 00:12:17"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/arm64/include/asm/kvm_nested.h","arch/arm64/kvm/at.c","arch/arm64/kvm/nested.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"4ead4def04659739c399bfcb063f8a906194c79f","status":"affected","version":"2a359e072596fcb2e9e85017a865e3618a2fe5b5","versionType":"git"},{"lessThan":"53804b6839573c9c6fff5f4cf075d6746267345e","status":"affected","version":"2a359e072596fcb2e9e85017a865e3618a2fe5b5","versionType":"git"},{"lessThan":"9f3e83345a56280efffe235c65593c7e544c0fcc","status":"affected","version":"2a359e072596fcb2e9e85017a865e3618a2fe5b5","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["arch/arm64/include/asm/kvm_nested.h","arch/arm64/kvm/at.c","arch/arm64/kvm/nested.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":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","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: nv: Inject SEA if kvm_translate_vncr() can't resolve PFN\n\nkvm_handle_vncr_abort() assumes that s1_walk_result conveys an abort\nwhen kvm_translate_vncr() returns -EFAULT. This is not always the case\nas it's possible to encounter 'late' failures on the output of S1\ntranslation, e.g. a GFN outside of the memslots.\n\nFix it by preparing an external abort before returning from\nkvm_translate_vncr(). Get rid of the BUG_ON() in the fault injection\npath while at it."}],"metrics":[{"cvssV3_1":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The bug is reached only when an arm64 nested-KVM L1 hypervisor triggers VNCR_EL2 data aborts (ESR_ELx_EC_DABT_CUR with ESR_ELx_VNCR) during KVM_RUN via kvm_handle_vncr_abort(); no network, adjacent-radio, or physical-device path reaches this code.\nAC:L - An attacker controlling an L1 nested-hypervisor VM can reliably set VNCR_EL2 and guest EL2 page tables so stage-1 translation succeeds but the resulting GFN is outside host memslots or PFN resolution fails, deterministically hitting the faulty -EFAULT path; nested virt on arm64 cloud hosts is an attacker-selectable deployment.\nPR:N - Exploitation requires no host root or init-namespace capabilities beyond running hypervisor code in a tenant KVM guest on an arm64 host with nested virtualization enabled; the attacker operates entirely from within their assigned VM, consistent with other arm64 KVM nested-virt CVE scoring.\nUI:N - No victim user or administrator action is required beyond the attacker operating their own nested-virtualization workload; VNCR faults, page-table configuration, and repeated translation triggers are fully attacker-driven from within the guest.\nS:C - A malicious nested guest forces host KVM into BUG_ON(!vt->wr.failed) during VNCR abort handling, crashing the physical host kernel and denying service to all co-resident VMs, crossing the guest-to-hypervisor security boundary beyond the guest's intended authority.\nC:N - The vulnerability triggers a host kernel BUG_ON panic on a late translation failure without setting s1_walk_result.failed; there is no out-of-bounds read, use-after-free, or other information-disclosure primitive—only an incorrect assumption leading to host crash.\nI:N - Impact is limited to host kernel panic via BUG_ON on the fault-injection path; no guest or host data is modified, no arbitrary write primitive exists, and the fix only prepares an external abort for reinjection to the nested guest.\nA:H - BUG_ON(!vt->wr.failed) on the late -EFAULT path causes an uncontained host kernel panic on production kernels (CONFIG_BUG=y), crashing the hypervisor and denying availability to every workload on the affected physical machine; the attacker can retrigger after reboot."}]}],"providerMetadata":{"dateUpdated":"2026-08-29T06:21:53.024Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/4ead4def04659739c399bfcb063f8a906194c79f"},{"url":"https://git.kernel.org/stable/c/53804b6839573c9c6fff5f4cf075d6746267345e"},{"url":"https://git.kernel.org/stable/c/9f3e83345a56280efffe235c65593c7e544c0fcc"}],"title":"KVM: arm64: nv: Inject SEA if kvm_translate_vncr() can't resolve PFN","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80665","datePublished":"2026-08-28T06:49:08.085Z","dateReserved":"2026-08-26T14:34:25.781Z","dateUpdated":"2026-08-29T06:21:53.024Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 08:16:51","lastModifiedDate":"2026-08-29 07:16:49","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.5,"impactScore":4}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80665","Ordinal":"1","Title":"KVM: arm64: nv: Inject SEA if kvm_translate_vncr() can't resolve","CVE":"CVE-2026-80665","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80665","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: nv: Inject SEA if kvm_translate_vncr() can't resolve PFN\n\nkvm_handle_vncr_abort() assumes that s1_walk_result conveys an abort\nwhen kvm_translate_vncr() returns -EFAULT. This is not always the case\nas it's possible to encounter 'late' failures on the output of S1\ntranslation, e.g. a GFN outside of the memslots.\n\nFix it by preparing an external abort before returning from\nkvm_translate_vncr(). Get rid of the BUG_ON() in the fault injection\npath while at it.","Type":"Description","Title":"KVM: arm64: nv: Inject SEA if kvm_translate_vncr() can't resolve"}]}}}