{
  "containers": {
    "cna": {
      "affected": [
        {
          "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": "8b7d4f68fef96cebe0b6dbb6e5607772337f7369",
              "status": "affected",
              "version": "37dfb676fafd1eef36fe0bb649607afbb0d5521b",
              "versionType": "git"
            },
            {
              "lessThan": "de83ff6a4d8f3618473bedb3c4400020c22e8a8a",
              "status": "affected",
              "version": "d4cc2dff12116a700add601c0262132cc26e1b2c",
              "versionType": "git"
            },
            {
              "lessThan": "973ea70393e885e540f714904e51bc6cac80e3d7",
              "status": "affected",
              "version": "93de2a6a4b91b72607136dd656edf03fb399d27f",
              "versionType": "git"
            }
          ]
        },
        {
          "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": "6.18.56",
              "status": "affected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThan": "7.2.10",
              "status": "affected",
              "version": "7.2.9",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.56",
                  "versionStartIncluding": "6.18.55",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.10",
                  "versionStartIncluding": "7.2.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "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-\u003eactive = 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\u0027s old\n    dirty ciphertext over the new page owner\u0027s data."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:24:29.156Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8b7d4f68fef96cebe0b6dbb6e5607772337f7369"
        },
        {
          "url": "https://git.kernel.org/stable/c/de83ff6a4d8f3618473bedb3c4400020c22e8a8a"
        },
        {
          "url": "https://git.kernel.org/stable/c/973ea70393e885e540f714904e51bc6cac80e3d7"
        }
      ],
      "title": "KVM: SEV: Do cache maintenance on the source VM *before* clearing SEV state",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98718",
    "datePublished": "2026-10-18T15:46:53.611Z",
    "dateReserved": "2026-09-25T10:25:14.366Z",
    "dateUpdated": "2026-10-19T09:24:29.156Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}