121 lines
5.6 KiB
JSON
121 lines
5.6 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-2026-98718",
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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": "2026-09-25T10:25:14.366Z",
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"datePublished": "2026-10-18T15:46:53.611Z",
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"dateUpdated": "2026-10-19T09:24:29.156Z"
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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": "2026-10-19T09:24:29.156Z"
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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: Do cache maintenance on the source VM *before* clearing SEV state\n\nExplicitly flush caches after intra-host migration before clearing \"SEV\nactive\" on the source VM, as doing cache maintenance afterwards creates a\ntiny window where memory reclaim could return memory to the host without\nperforming a cache flush, e.g. as pointed out by Sashiko:\n\n CPU1 in sev_migrate_from():\n src->active = false;\n\n CPU2 running concurrent unmap:\n Since active is false, the automatic cache flush in\n sev_guest_memory_reclaimed is skipped.\n The host frees and reallocates the page.\n\n CPU1 in sev_migrate_from():\n sev_writeback_caches(src_kvm);\n Executes a hardware cache flush (wbnoinvd), which writes the guest's old\n dirty ciphertext over the new page owner's data."
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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": "37dfb676fafd1eef36fe0bb649607afbb0d5521b",
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"lessThan": "8b7d4f68fef96cebe0b6dbb6e5607772337f7369",
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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": "d4cc2dff12116a700add601c0262132cc26e1b2c",
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"lessThan": "de83ff6a4d8f3618473bedb3c4400020c22e8a8a",
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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": "93de2a6a4b91b72607136dd656edf03fb399d27f",
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"lessThan": "973ea70393e885e540f714904e51bc6cac80e3d7",
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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": "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": "6.18.55",
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"lessThan": "6.18.56",
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"status": "affected",
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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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"lessThan": "7.2.10",
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"status": "affected",
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"versionType": "semver"
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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": "6.18.55",
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"versionEndExcluding": "6.18.56"
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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": "7.2.9",
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"versionEndExcluding": "7.2.10"
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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/8b7d4f68fef96cebe0b6dbb6e5607772337f7369"
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},
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{
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"url": "https://git.kernel.org/stable/c/de83ff6a4d8f3618473bedb3c4400020c22e8a8a"
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},
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{
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"url": "https://git.kernel.org/stable/c/973ea70393e885e540f714904e51bc6cac80e3d7"
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}
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],
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"title": "KVM: SEV: Do cache maintenance on the source VM *before* clearing SEV state",
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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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} |