{"api_version":"1","generated_at":"2026-09-12T11:24:01+00:00","cve":"CVE-2026-80873","urls":{"html":"https://cve.report/CVE-2026-80873","api":"https://cve.report/api/cve/CVE-2026-80873.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80873","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80873"},"summary":{"title":"KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions\n\nkvm_inject_el2_exception() writes ESR_EL2 for synchronous exceptions\nbut not for SError. enter_exception64() does not write ESR_ELx for any\nexception type, so the constructed syndrome is dropped. A guest L2\nhypervisor taking a nested SError observes stale ESR_EL2.\n\nThis affects both kvm_inject_nested_serror() and the EASE path in\nkvm_inject_nested_sea().\n\nWrite ESR_EL2 for except_type_serror, matching except_type_sync.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-04 17:16:59","updated_at":"2026-09-04 17:16:59"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/29227821e2320ff6a174c91742b4ce221fe8d563","name":"https://git.kernel.org/stable/c/29227821e2320ff6a174c91742b4ce221fe8d563","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e2cb1f4578625e71f461d5c1ce70984193389cbb","name":"https://git.kernel.org/stable/c/e2cb1f4578625e71f461d5c1ce70984193389cbb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/09f35145f3a4aacea4d9b914ad895bf5af8fc4ae","name":"https://git.kernel.org/stable/c/09f35145f3a4aacea4d9b914ad895bf5af8fc4ae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80873","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80873","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 77ee70a073575977b403e9add25f185d614217d8 09f35145f3a4aacea4d9b914ad895bf5af8fc4ae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 77ee70a073575977b403e9add25f185d614217d8 29227821e2320ff6a174c91742b4ce221fe8d563 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 77ee70a073575977b403e9add25f185d614217d8 e2cb1f4578625e71f461d5c1ce70984193389cbb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.17","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17 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":"80873","cve":"CVE-2026-80873","epss":"0.001540000","percentile":"0.048790000","score_date":"2026-09-07","updated_at":"2026-09-08 00:05:26"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/arm64/kvm/emulate-nested.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"09f35145f3a4aacea4d9b914ad895bf5af8fc4ae","status":"affected","version":"77ee70a073575977b403e9add25f185d614217d8","versionType":"git"},{"lessThan":"29227821e2320ff6a174c91742b4ce221fe8d563","status":"affected","version":"77ee70a073575977b403e9add25f185d614217d8","versionType":"git"},{"lessThan":"e2cb1f4578625e71f461d5c1ce70984193389cbb","status":"affected","version":"77ee70a073575977b403e9add25f185d614217d8","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["arch/arm64/kvm/emulate-nested.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.17"},{"lessThan":"6.17","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":"6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.17","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions\n\nkvm_inject_el2_exception() writes ESR_EL2 for synchronous exceptions\nbut not for SError. enter_exception64() does not write ESR_ELx for any\nexception type, so the constructed syndrome is dropped. A guest L2\nhypervisor taking a nested SError observes stale ESR_EL2.\n\nThis affects both kvm_inject_nested_serror() and the EASE path in\nkvm_inject_nested_sea().\n\nWrite ESR_EL2 for except_type_serror, matching except_type_sync."}],"providerMetadata":{"dateUpdated":"2026-09-04T16:48:40.889Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/09f35145f3a4aacea4d9b914ad895bf5af8fc4ae"},{"url":"https://git.kernel.org/stable/c/29227821e2320ff6a174c91742b4ce221fe8d563"},{"url":"https://git.kernel.org/stable/c/e2cb1f4578625e71f461d5c1ce70984193389cbb"}],"title":"KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80873","datePublished":"2026-09-04T16:48:40.889Z","dateReserved":"2026-08-26T14:34:25.798Z","dateUpdated":"2026-09-04T16:48:40.889Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-04 17:16:59","lastModifiedDate":"2026-09-04 17:16:59","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80873","Ordinal":"1","Title":"KVM: arm64: nv: Write ESR_EL2 for injected nested SError excepti","CVE":"CVE-2026-80873","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80873","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions\n\nkvm_inject_el2_exception() writes ESR_EL2 for synchronous exceptions\nbut not for SError. enter_exception64() does not write ESR_ELx for any\nexception type, so the constructed syndrome is dropped. A guest L2\nhypervisor taking a nested SError observes stale ESR_EL2.\n\nThis affects both kvm_inject_nested_serror() and the EASE path in\nkvm_inject_nested_sea().\n\nWrite ESR_EL2 for except_type_serror, matching except_type_sync.","Type":"Description","Title":"KVM: arm64: nv: Write ESR_EL2 for injected nested SError excepti"}]}}}