cxl/region: Block region delete during region creation

{
  "id": "c72a62264dd3eb6b81222f1eb692636c61bb730621d9745548831631af157bd5",
  "url": "https://osv.dev/vulnerability/CVE-2026-74273",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "cxl/region: Block region delete during region creation",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: cxl/region: Block region delete during region creation Expand the range lock, rename it \"regions_lock\", to disable region deletion in the critical period between construct_region() and attach_target(), as well as the period between device_add() and registering the remove actions. Otherwise, userspace can confuse the kernel. It can violate the assumption the region stays registered through the completion of cxl_add_to_region(). It can violate the assumption that devm_add_action_or_reset() is working with a live 'struct cxl_region'. It is ok for the region to disappear outside of those windows as that mirrors device hotplug flows where the proper locks are held.",
    "evidence": "osv:CVE-2026-74273",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.160",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.114",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.57",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-74273",
      "aliases": [
        "CVE-2026-74273"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a32320b71f085f8d82afedcf285f1682c8c00aed"
                },
                {
                  "fixed": "8efa9fcc1d31b29b31e0ac4efe48624a729796bc"
                },
                {
                  "fixed": "ecc86a28dc27509da511bb3f8c309750233e3177"
                },
                {
                  "fixed": "98c7e206af48b4433b2192cc1a538db2acc49876"
                },
                {
                  "fixed": "b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8"
                },
                {
                  "fixed": "d91feb88692e81b00cd22f0125cfcd04970b4a0b"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74273.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.3.0"
                },
                {
                  "fixed": "6.6.160"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.114"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.57"
                }
              ]
            },
            {
              "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-2026-74273.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.751036013Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/8efa9fcc1d31b29b31e0ac4efe48624a729796bc",
        "https://git.kernel.org/stable/c/98c7e206af48b4433b2192cc1a538db2acc49876",
        "https://git.kernel.org/stable/c/b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8",
        "https://git.kernel.org/stable/c/d91feb88692e81b00cd22f0125cfcd04970b4a0b",
        "https://git.kernel.org/stable/c/ecc86a28dc27509da511bb3f8c309750233e3177",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74273.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-74273",
        "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/2026/74xxx/CVE-2026-74273.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-74273",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 506314,
  "published_at": "2026-08-15T05:57:46.134+00:00"
}