kho: make sure scratch size is always aligned by CMA_MIN_ALIGNMENT_BYTES

{
  "id": "ef9d4ac287c36559bd87fb29e3e0d219a6b26875f5dba8db2620c12e7793c02f",
  "url": "https://osv.dev/vulnerability/CVE-2026-72169",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "kho: make sure scratch size is always aligned by CMA_MIN_ALIGNMENT_BYTES",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: kho: make sure scratch size is always aligned by CMA_MIN_ALIGNMENT_BYTES When using scratch_scale, the scratch sizes are rounded up to CMA_MIN_ALIGNMENT_BYTES since they will be released as MIGRATE_CMA. This is not done when using fixed scratch sizes via command line. This can result in user specifying a size which is not aligned, and thus kernel releasing a pageblock that is only partially scratch. Do the rounding up for both cases in scratch_size_update().",
    "evidence": "osv:CVE-2026-72169",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.42",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-72169",
      "aliases": [
        "CVE-2026-72169"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "3dc92c311498c4d307cfdd0c6c3ac9355b50f683"
                },
                {
                  "fixed": "b8271be34bce151597da5b5179e0648c281322a4"
                },
                {
                  "fixed": "9fefab759f59bf891bef7be15aee4bc7caec7ec3"
                },
                {
                  "fixed": "0e39380a7316122e1b00012b3f3cd3e318b3e7d3"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72169.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.16.0"
                },
                {
                  "fixed": "6.18.42"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72169.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:46.344389603Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0e39380a7316122e1b00012b3f3cd3e318b3e7d3",
        "https://git.kernel.org/stable/c/9fefab759f59bf891bef7be15aee4bc7caec7ec3",
        "https://git.kernel.org/stable/c/b8271be34bce151597da5b5179e0648c281322a4",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72169.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-72169",
        "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/2026/72xxx/CVE-2026-72169.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-72169",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 514411,
  "published_at": "2026-08-15T05:53:35.599+00:00"
}