pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy()

{
  "id": "ba5f4aa49f418fdb5fbb16e64a627e13c2b12e7190f67a0a8a599c4b2b3e4ccb",
  "url": "https://osv.dev/vulnerability/CVE-2026-46308",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy() In scpsys_get_bus_protection_legacy(), of_find_node_with_property() returns a device node with its reference count incremented. The function then calls of_node_put(node) before checking whether syscon_regmap_lookup_by_phandle() returns an error. If an error occurs, dev_err_probe() dereferences the node pointer to print diagnostic information, but the node memory may have already been freed due to the earlier of_node_put(), leading to a use-after-free vulnerability. Fix this by moving the of_node_put() call after the error check, ensuring the node is still valid when accessed in the error path.",
    "evidence": "osv:CVE-2026-46308",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.30",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-46308",
      "aliases": [
        "CVE-2026-46308"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c29345fa5f66bea0790cf2219f57b974d4fc177b"
                },
                {
                  "fixed": "cb27e43c0511e9e1ca8818d231656070b11c18cf"
                },
                {
                  "fixed": "38d8410021b55d226847b2ac8d189d89fe5a8866"
                },
                {
                  "fixed": "ec1fcddb3117d9452210e838fd37389ee61e10e8"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46308.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.18.0"
                },
                {
                  "fixed": "6.18.30"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.0.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46308.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.739645330Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/38d8410021b55d226847b2ac8d189d89fe5a8866",
        "https://git.kernel.org/stable/c/cb27e43c0511e9e1ca8818d231656070b11c18cf",
        "https://git.kernel.org/stable/c/ec1fcddb3117d9452210e838fd37389ee61e10e8",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46308.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-46308",
        "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/2026/46xxx/CVE-2026-46308.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-46308",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 489902,
  "published_at": "2026-06-08T15:46:36.218+00:00"
}