CVE-2026-72286

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it is a local ioctl/syscall path, not remote network, adjacent-radio, or physical I/O.\nAC:L - An attacker who controls both source and destination KVM VM fds can deterministically invoke sev_vm_move_enc_context_from() or sev_vm_copy_enc_context_from() on a launched SEV-SNP VM; no race, special memory layout, or other uncontrollable condition is required.\nPR:L - Exploitation requires local /dev/kvm (and /dev/sev) access to create SNP VMs and issue KVM_ENABLE_CAP, privileges commonly granted to kvm-group users, QEMU tenants, or container workloads with KVM passthrough, not real root in the init namespace.\nUI:N - No victim user action is required; the attacker\u2019s own VMM process issues the migration/mirroring ioctl sequence directly once it holds the relevant VM file descriptors.\nS:C - Incomplete SNP state transfer crosses the SEV-SNP guest/host trust boundary: mirroring leaves an SNP-bound ASID managed via SEV code paths (missing vmsa_features), and migration leaves destination VMs without snp_context or guest-request buffers.\nC:H - SNP/SEV type confusion can undermine SEV-SNP memory isolation and let a hypervisor-side actor access confidential guest memory; missing guest_req_buf/guest_resp_buf and uninitialized mutex also create kernel memory safety failures with disclosure potential.\nI:H - Inconsistent SNP firmware context and uninitialized guest-request state can corrupt hypervisor memory and guest execution paths during SNP VMGEXIT guest-request handling, enabling modification of protected guest memory and host kernel structures.\nA:H - Migrated SNP VMs reach snp_handle_guest_req() with NULL snp_context/guest_req_buf and an uninitialized guest_req_mutex, which can NULL-dereference or corrupt kernel state and panic/oops the host when the guest issues SNP guest-request VMGEXITs."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/kvm/svm/sev.c"], "versions": [{"version": "1dfe571c12cf99244b933208fb77f29471ded677", "lessThan": "b70404b89daad5f9f33f7ac640b1065cba639935", "status": "affected", "versionType": "git"}, {"version": "1dfe571c12cf99244b933208fb77f29471ded677", "lessThan": "ba06690b28be950bd46d938d9b919c4024292627", "status": "affected", "versionType": "git"}, {"version": "1dfe571c12cf99244b933208fb77f29471ded677", "lessThan": "d2f9df3b615ca0cd45899c090366945528186052", "status": "affected", "versionType": "git"}, {"version": "1dfe571c12cf99244b933208fb77f29471ded677", "lessThan": "6ee4140788234a6fabf59e6a50e38cdb936008cd", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/kvm/svm/sev.c"], "versions": [{"version": "6.11", "status": "affected"}, {"version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b70404b89daad5f9f33f7ac640b1065cba639935"}, {"url": "https://git.kernel.org/stable/c/ba06690b28be950bd46d938d9b919c4024292627"}, {"url": "https://git.kernel.org/stable/c/d2f9df3b615ca0cd45899c090366945528186052"}, {"url": "https://git.kernel.org/stable/c/6ee4140788234a6fabf59e6a50e38cdb936008cd"}], "title": "KVM: SEV: Do not allow intra-host migration/mirroring of SNP VMs", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-72286", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:45:45.786845Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:55:14.819Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-72286", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:45:45.786845Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:45:46.799Z"}}], "cna": {"title": "KVM: SEV: Do not allow intra-host migration/mirroring of SNP VMs", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The flaw is reached only through KVM_ENABLE_CAP on a VM file descriptor (KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM or KVM_CAP_VM_COPY_ENC_CONTEXT_FROM) after opening /dev/kvm; it is a local ioctl/syscall path, not remote network, adjacent-radio, or physical I/O.\nAC:L - An attacker who controls both source and destination KVM VM fds can deterministically invoke sev_vm_move_enc_context_from() or sev_vm_copy_enc_context_from() on a launched SEV-SNP VM; no race, special memory layout, or other uncontrollable condition is required.\nPR:L - Exploitation requires local /dev/kvm (and /dev/sev) access to create SNP VMs and issue KVM_ENABLE_CAP, privileges commonly granted to kvm-group users, QEMU tenants, or container workloads with KVM passthrough, not real root in the init namespace.\nUI:N - No victim user action is required; the attacker\u2019s own VMM process issues the migration/mirroring ioctl sequence directly once it holds the relevant VM file descriptors.\nS:C - Incomplete SNP state transfer crosses the SEV-SNP guest/host trust boundary: mirroring leaves an SNP-bound ASID managed via SEV code paths (missing vmsa_features), and migration leaves destination VMs without snp_context or guest-request buffers.\nC:H - SNP/SEV type confusion can undermine SEV-SNP memory isolation and let a hypervisor-side actor access confidential guest memory; missing guest_req_buf/guest_resp_buf and uninitialized mutex also create kernel memory safety failures with disclosure potential.\nI:H - Inconsistent SNP firmware context and uninitialized guest-request state can corrupt hypervisor memory and guest execution paths during SNP VMGEXIT guest-request handling, enabling modification of protected guest memory and host kernel structures.\nA:H - Migrated SNP VMs reach snp_handle_guest_req() with NULL snp_context/guest_req_buf and an uninitialized guest_req_mutex, which can NULL-dereference or corrupt kernel state and panic/oops the host when the guest issues SNP guest-request VMGEXITs."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1dfe571c12cf99244b933208fb77f29471ded677", "lessThan": "b70404b89daad5f9f33f7ac640b1065cba639935", "versionType": "git"}, {"status": "affected", "version": "1dfe571c12cf99244b933208fb77f29471ded677", "lessThan": "ba06690b28be950bd46d938d9b919c4024292627", "versionType": "git"}, {"status": "affected", "version": "1dfe571c12cf99244b933208fb77f29471ded677", "lessThan": "d2f9df3b615ca0cd45899c090366945528186052", "versionType": "git"}, {"status": "affected", "version": "1dfe571c12cf99244b933208fb77f29471ded677", "lessThan": "6ee4140788234a6fabf59e6a50e38cdb936008cd", "versionType": "git"}], "programFiles": ["arch/x86/kvm/svm/sev.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.11"}, {"status": "unaffected", "version": "0", "lessThan": "6.11", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["arch/x86/kvm/svm/sev.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/b70404b89daad5f9f33f7ac640b1065cba639935"}, {"url": "https://git.kernel.org/stable/c/ba06690b28be950bd46d938d9b919c4024292627"}, {"url": "https://git.kernel.org/stable/c/d2f9df3b615ca0cd45899c090366945528186052"}, {"url": "https://git.kernel.org/stable/c/6ee4140788234a6fabf59e6a50e38cdb936008cd"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SEV: Do not allow intra-host migration/mirroring of SNP VMs\n\nThe intra-host migration/mirroring feature is not fully implemented for\nSEV-SNP VMs. The proper migration requires additional SNP-specific\nstate such as guest_req_mutex, guest_req_buf, and guest_resp_buf to be\ntransferred or initialized on the destination.\n\nThe SNP VM mirroring requires vmsa features to be copied as well otherwise\nASID would be bound to SNP range while VM is detected as a SEV VM.\n\nReject SNP source VMs in migration/mirroring until proper SNP state\ntransfer is implemented.\n\n\n[sean: let lines poke past 80 chars, tag for stable]"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.97", "versionStartIncluding": "6.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "6.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "6.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "6.11"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:42:21.458Z"}}}, "cveMetadata": {"cveId": "CVE-2026-72286", "state": "PUBLISHED", "dateUpdated": "2026-10-16T18:55:14.819Z", "dateReserved": "2026-08-09T03:40:39.917Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:55:09.004Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/x86/kvm/svm/sev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b70404b89daad5f9f33f7ac640b1065cba639935", "status": "affected", "version": "1dfe571c12cf99244b933208fb77f29471ded677", "versionType": "git"}, {"lessThan": "ba06690b28be950bd46d938d9b919c4024292627", "status": "affected", "version": "1dfe571c12cf99244b933208fb77f29471ded677", "versionType": "git"}, {"lessThan": "d2f9df3b615ca0cd45899c090366945528186052", "status": "affected", "version": "1dfe571c12cf99244b933208fb77f29471ded677", "versionType": "git"}, {"lessThan": "6ee4140788234a6fabf59e6a50e38cdb936008cd", "status": "affected", "version": "1dfe571c12cf99244b933208fb77f29471ded677", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/x86/kvm/svm/sev.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.11"}, {"lessThan": "6.11", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SEV: Do not allow intra-host migration/mirroring of SNP VMs\n\nThe intra-host migration/mirroring feature is not fully implemented for\nSEV-SNP VMs. The proper migration requires additional SNP-specific\nstate such as guest_req_mutex, guest_req_buf, and guest_resp_buf to be\ntransferred or initialized on the destination.\n\nThe SNP VM mirroring requires vmsa features to be copied as well otherwise\nASID would be bound to SNP range while VM is detected as a SEV VM.\n\nReject SNP source VMs in migration/mirroring until proper SNP state\ntransfer is implemented.\n\n\n[sean: let lines poke past 80 chars, tag for stable]"}], "id": "CVE-2026-72286", "lastModified": "2026-10-16T19:17:18.883", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72286", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T18:45:45.786845Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:21:59.920", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6ee4140788234a6fabf59e6a50e38cdb936008cd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b70404b89daad5f9f33f7ac640b1065cba639935"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ba06690b28be950bd46d938d9b919c4024292627"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d2f9df3b615ca0cd45899c090366945528186052"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: KVM: SEV: Do not allow intra-host migration/mirroring of SNP VMs", "id": "2516683", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516683"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-909", "details": ["A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) with Secure Encrypted Virtualization (SEV) and Secure Nested Paging (SNP) virtual machines. The intra-host migration and mirroring feature is not fully implemented for SEV-SNP VMs. This incomplete implementation means that critical SNP-specific security state is not properly transferred or initialized during these operations. Consequently, allowing such operations could lead to a bypass of the intended security protections for the virtual machine, potentially compromising its integrity or confidentiality."], "name": "CVE-2026-72286", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72286\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72286\nhttps://lore.kernel.org/linux-cve-announce/2026081559-CVE-2026-72286-6e63@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1dfe571c12cf99244b933208fb77f29471ded677,b70404b89daad5f9f33f7ac640b1065cba639935)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1dfe571c12cf99244b933208fb77f29471ded677,ba06690b28be950bd46d938d9b919c4024292627)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1dfe571c12cf99244b933208fb77f29471ded677,d2f9df3b615ca0cd45899c090366945528186052)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1dfe571c12cf99244b933208fb77f29471ded677,6ee4140788234a6fabf59e6a50e38cdb936008cd)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc4,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T10:45:06.979280+00:00", "updated": "2026-08-22T12:00:04.918009+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}