{"schema":"threatline.record/2","record":{"id":"CVE-2026-98472","aliases":[],"summary":"KVM: SEV: Free have_run_cpus during VM destruction even if VM is no longer SEV","details":"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.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98472","source_modified_at":"2026-10-19T09:20:10.096Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","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"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98472","source_modified_at":"2026-10-19T09:20:10.096Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","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"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98472","source_modified_at":"2026-10-19T09:20:10.096Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6aef7cf800098749ff5d660222efaf6e01e98c09","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98472","source_modified_at":"2026-10-19T09:20:10.096Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"9784e5ca91b37b387f3f414af4340c54f7a63566","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98472","source_modified_at":"2026-10-19T09:20:10.096Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"12c1f6e03f944e399bd2c88441dca5dc702b95a5","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00166,"percentile":0.05521,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:15:24.654Z","modified_at":"2026-10-19T09:20:10.096Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98472","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:20:10.096Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98472","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/6aef7cf800098749ff5d660222efaf6e01e98c09"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/9784e5ca91b37b387f3f414af4340c54f7a63566"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/12c1f6e03f944e399bd2c88441dca5dc702b95a5"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:20:10.096Z","content_hash":"85a33d1195cba3507102de4b71197568db6f0c07aa9aa3efd553f7d9dbc318e0"}}