xfs: fix wild memcpy access when formatting ondisk rtrefcount btree roots

{
  "id": "0d56bda424ac29ec92e39b452a38ab5aa64672e9b264d7b2de6fff140abf996a",
  "url": "https://osv.dev/vulnerability/CVE-2026-98447",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "xfs: fix wild memcpy access when formatting ondisk rtrefcount btree roots",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: xfs: fix wild memcpy access when formatting ondisk rtrefcount btree roots LOLLM noticed that the inode btree root formatting methods copy too many bytes -- there's only one set of keys in node blocks, not two. This causes memory corruption of whatever's beyond the buffers.",
    "evidence": "osv:CVE-2026-98447",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.55",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98447",
      "aliases": [
        "CVE-2026-98447"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f0415af60f482a2192065be8b334b409495ca8a3"
                },
                {
                  "fixed": "d46492fb8018d12d00651b06b9d240e747110b38"
                },
                {
                  "fixed": "2703b954d306ebfe3b11e33e259759329c11b690"
                },
                {
                  "fixed": "fe2f9135df43db849e74f03956d322ac20b59af7"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98447.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.14.0"
                },
                {
                  "fixed": "6.18.55"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.9"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98447.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.881534958Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2703b954d306ebfe3b11e33e259759329c11b690",
        "https://git.kernel.org/stable/c/d46492fb8018d12d00651b06b9d240e747110b38",
        "https://git.kernel.org/stable/c/fe2f9135df43db849e74f03956d322ac20b59af7",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98447.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98447",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98447.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98447",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 517193,
  "published_at": "2026-10-18T15:14:57.561+00:00"
}