CVE-2026-98472

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98472", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.351Z", "datePublished": "2026-10-18T15:15:24.654Z", "dateUpdated": "2026-10-19T09:20:10.096Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:20:10.096Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SEV: Free have_run_cpus during VM destruction even if VM is no longer SEV\n\nUnconditionally free SEV's \"have run CPUs\" cpumask in the VM destroy path,\ni.e. even for what appear to be non-SEV VMs, as an SEV VM becomes a non-SEV\nVM if its state is intra-host migrated. Alternatively, the mask could be\nfreed in sev_migrate_from() when \"converting\" the source VM, but that gets\nannoying because ideally KVM would nullify the mask to guard against UAF,\nand nullifying the mask would need be conditioned on CPUMASK_OFFSTACK=y.\n\nFreeing the mask during sev_migrate_from() is also not robust against other\nKVM bugs, though that's kind of a moot point since any such bugs would show\nup even if sev->active is never set. I.e. KVM must get that side of things\ncorrect. But, that's not a great reason to add more code just to make\nthings marginally less robust."}], "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": "6f38f8c574642a822f2e85f079fa29a49176c49c", "lessThan": "6aef7cf800098749ff5d660222efaf6e01e98c09", "status": "affected", "versionType": "git"}, {"version": "6f38f8c574642a822f2e85f079fa29a49176c49c", "lessThan": "9784e5ca91b37b387f3f414af4340c54f7a63566", "status": "affected", "versionType": "git"}, {"version": "6f38f8c574642a822f2e85f079fa29a49176c49c", "lessThan": "12c1f6e03f944e399bd2c88441dca5dc702b95a5", "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": "6.17", "status": "affected"}, {"version": "0", "lessThan": "6.17", "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": "6.17", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6aef7cf800098749ff5d660222efaf6e01e98c09"}, {"url": "https://git.kernel.org/stable/c/9784e5ca91b37b387f3f414af4340c54f7a63566"}, {"url": "https://git.kernel.org/stable/c/12c1f6e03f944e399bd2c88441dca5dc702b95a5"}], "title": "KVM: SEV: Free have_run_cpus during VM destruction even if VM is no longer SEV", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"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": "6aef7cf800098749ff5d660222efaf6e01e98c09", "status": "affected", "version": "6f38f8c574642a822f2e85f079fa29a49176c49c", "versionType": "git"}, {"lessThan": "9784e5ca91b37b387f3f414af4340c54f7a63566", "status": "affected", "version": "6f38f8c574642a822f2e85f079fa29a49176c49c", "versionType": "git"}, {"lessThan": "12c1f6e03f944e399bd2c88441dca5dc702b95a5", "status": "affected", "version": "6f38f8c574642a822f2e85f079fa29a49176c49c", "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": "6.17"}, {"lessThan": "6.17", "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: SEV: Free have_run_cpus during VM destruction even if VM is no longer SEV\n\nUnconditionally free SEV's \"have run CPUs\" cpumask in the VM destroy path,\ni.e. even for what appear to be non-SEV VMs, as an SEV VM becomes a non-SEV\nVM if its state is intra-host migrated. Alternatively, the mask could be\nfreed in sev_migrate_from() when \"converting\" the source VM, but that gets\nannoying because ideally KVM would nullify the mask to guard against UAF,\nand nullifying the mask would need be conditioned on CPUMASK_OFFSTACK=y.\n\nFreeing the mask during sev_migrate_from() is also not robust against other\nKVM bugs, though that's kind of a moot point since any such bugs would show\nup even if sev->active is never set. I.e. KVM must get that side of things\ncorrect. But, that's not a great reason to add more code just to make\nthings marginally less robust."}], "id": "CVE-2026-98472", "lastModified": "2026-10-19T10:18:57.743", "metrics": {}, "published": "2026-10-18T16:16:57.697", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/12c1f6e03f944e399bd2c88441dca5dc702b95a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6aef7cf800098749ff5d660222efaf6e01e98c09"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9784e5ca91b37b387f3f414af4340c54f7a63566"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: KVM: SEV: Free have_run_cpus during VM destruction even if VM is no longer SEV", "id": "2554876", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554876"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the Linux kernel's KVM (Kernel-based Virtual Machine) AMD SEV (Secure Encrypted Virtualization) implementation. This flaw allows a local user with permissions to manage virtual machines to cause a denial of service (DoS) through memory exhaustion. When an SEV guest is destroyed after undergoing an intra-host migration, the kernel fails to release allocated CPU tracking memory, resulting in an unrecoverable memory leak each time a migrated guest is terminated."], "name": "CVE-2026-98472", "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": "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": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98472\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98472\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98472.mbox"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6f38f8c574642a822f2e85f079fa29a49176c49c,6aef7cf800098749ff5d660222efaf6e01e98c09)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6f38f8c574642a822f2e85f079fa29a49176c49c,9784e5ca91b37b387f3f414af4340c54f7a63566)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6f38f8c574642a822f2e85f079fa29a49176c49c,12c1f6e03f944e399bd2c88441dca5dc702b95a5)"}}], "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": "generic", "value": "6.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.17)"}}, {"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-rc5,*]"}}], "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": "2026-10-18T16:45:17.334549+00:00", "updated": "2026-10-23T07:15:17.231425+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}