CVE-2026-98928

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98928", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.380Z", "datePublished": "2026-10-23T12:08:09.412Z", "dateUpdated": "2026-10-23T12:08:09.412Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-23T12:08:09.412Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2\n\npkvm_init_features_from_host() takes KVM_ARCH_FLAG_GUEST_HAS_SVE and\nKVM_ARM_VCPU_SVE from the host separately, but pkvm_vcpu_init_sve()\ntests the bit while vcpu_has_sve() reads the flag. A host that sets the\nflag without the bit gets a vCPU with a NULL sve_state that the world\nswitch loads the guest's SVE state from.\n\nDerive the flag from the bit, and drop the protected path's copy of the\nhost's flag, which is dead code since protected VMs are not allowed SVE."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/kvm/hyp/nvhe/pkvm.c"], "versions": [{"version": "41d6028e28bd474298ff10409c292ec46cf43a90", "lessThan": "4efda204087145d40a84344edec7e9d3885ad3ab", "status": "affected", "versionType": "git"}, {"version": "41d6028e28bd474298ff10409c292ec46cf43a90", "lessThan": "7b5e99d286747b6b5b583b8efcd06bdbdd94b229", "status": "affected", "versionType": "git"}, {"version": "41d6028e28bd474298ff10409c292ec46cf43a90", "lessThan": "4f16c5fc8dc4c5596e3777ab9f449a54e3f85fd5", "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/arm64/kvm/hyp/nvhe/pkvm.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.14", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4efda204087145d40a84344edec7e9d3885ad3ab"}, {"url": "https://git.kernel.org/stable/c/7b5e99d286747b6b5b583b8efcd06bdbdd94b229"}, {"url": "https://git.kernel.org/stable/c/4f16c5fc8dc4c5596e3777ab9f449a54e3f85fd5"}], "title": "KVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"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": "4efda204087145d40a84344edec7e9d3885ad3ab", "status": "affected", "version": "41d6028e28bd474298ff10409c292ec46cf43a90", "versionType": "git"}, {"lessThan": "7b5e99d286747b6b5b583b8efcd06bdbdd94b229", "status": "affected", "version": "41d6028e28bd474298ff10409c292ec46cf43a90", "versionType": "git"}, {"lessThan": "4f16c5fc8dc4c5596e3777ab9f449a54e3f85fd5", "status": "affected", "version": "41d6028e28bd474298ff10409c292ec46cf43a90", "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": "6.14"}, {"lessThan": "6.14", "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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2\n\npkvm_init_features_from_host() takes KVM_ARCH_FLAG_GUEST_HAS_SVE and\nKVM_ARM_VCPU_SVE from the host separately, but pkvm_vcpu_init_sve()\ntests the bit while vcpu_has_sve() reads the flag. A host that sets the\nflag without the bit gets a vCPU with a NULL sve_state that the world\nswitch loads the guest's SVE state from.\n\nDerive the flag from the bit, and drop the protected path's copy of the\nhost's flag, which is dead code since protected VMs are not allowed SVE."}], "id": "CVE-2026-98928", "lastModified": "2026-10-23T13:17:13.567", "metrics": {}, "published": "2026-10-23T13:17:13.567", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4efda204087145d40a84344edec7e9d3885ad3ab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4f16c5fc8dc4c5596e3777ab9f449a54e3f85fd5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7b5e99d286747b6b5b583b8efcd06bdbdd94b229"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: KVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2", "id": "2559628", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559628"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nKVM: arm64: Derive GUEST_HAS_SVE from the SVE feature bit at EL2\npkvm_init_features_from_host() takes KVM_ARCH_FLAG_GUEST_HAS_SVE and\nKVM_ARM_VCPU_SVE from the host separately, but pkvm_vcpu_init_sve()\ntests the bit while vcpu_has_sve() reads the flag. A host that sets the\nflag without the bit gets a vCPU with a NULL sve_state that the world\nswitch loads the guest's SVE state from.\nDerive the flag from the bit, and drop the protected path's copy of the\nhost's flag, which is dead code since protected VMs are not allowed SVE.", "A flaw was found in the Linux kernel's KVM (Kernel-based Virtual Machine) subsystem for ARM64. A local privileged user can cause a Denial of Service (DoS) by initializing a virtual machine with inconsistent Scalable Vector Extension (SVE) settings. This condition leads to a null pointer dereference when loading CPU state during a context switch, resulting in a hypervisor crash."], "name": "CVE-2026-98928", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98928\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98928\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98928.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[41d6028e28bd474298ff10409c292ec46cf43a90,4efda204087145d40a84344edec7e9d3885ad3ab)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[41d6028e28bd474298ff10409c292ec46cf43a90,7b5e99d286747b6b5b583b8efcd06bdbdd94b229)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[41d6028e28bd474298ff10409c292ec46cf43a90,4f16c5fc8dc4c5596e3777ab9f449a54e3f85fd5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[41d6028e28bd474298ff10409c292ec46cf43a90,4efda204087145d40a84344edec7e9d3885ad3ab)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[41d6028e28bd474298ff10409c292ec46cf43a90,7b5e99d286747b6b5b583b8efcd06bdbdd94b229)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[41d6028e28bd474298ff10409c292ec46cf43a90,4f16c5fc8dc4c5596e3777ab9f449a54e3f85fd5)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.14"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.14)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-23T14:45:17.885164+00:00", "updated": "2026-10-29T22:15:04.255025+00:00", "vendors": ["linux", "linux$PRODUCT$linux", "linux$PRODUCT$linux_kernel"]}