143 lines
6.7 KiB
JSON
143 lines
6.7 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-98472",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:25:14.351Z",
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"datePublished": "2026-10-18T15:15:24.654Z",
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"dateUpdated": "2026-10-19T09:20:10.096Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:20:10.096Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/x86/kvm/svm/sev.c"
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],
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"versions": [
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{
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"version": "6f38f8c574642a822f2e85f079fa29a49176c49c",
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"lessThan": "6aef7cf800098749ff5d660222efaf6e01e98c09",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6f38f8c574642a822f2e85f079fa29a49176c49c",
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"lessThan": "9784e5ca91b37b387f3f414af4340c54f7a63566",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6f38f8c574642a822f2e85f079fa29a49176c49c",
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"lessThan": "12c1f6e03f944e399bd2c88441dca5dc702b95a5",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"arch/x86/kvm/svm/sev.c"
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],
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"versions": [
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{
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"version": "6.17",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.17",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.55",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.9",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.17",
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"versionEndExcluding": "6.18.55"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.17",
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"versionEndExcluding": "7.2.9"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.17",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/6aef7cf800098749ff5d660222efaf6e01e98c09"
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},
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{
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"url": "https://git.kernel.org/stable/c/9784e5ca91b37b387f3f414af4340c54f7a63566"
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},
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{
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"url": "https://git.kernel.org/stable/c/12c1f6e03f944e399bd2c88441dca5dc702b95a5"
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}
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],
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"title": "KVM: SEV: Free have_run_cpus during VM destruction even if VM is no longer SEV",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |