devlink: Release nested relation on devlink free

{
  "id": "fa787c6526b855556786c6b7070ef95965d978058db48aa520a1f1deeac16605",
  "url": "https://osv.dev/vulnerability/CVE-2026-53261",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "devlink: Release nested relation on devlink free",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: devlink: Release nested relation on devlink free devlink relation state is normally released from devl_unregister(), which calls devlink_rel_put(). This misses devlink instances that get a nested relation before registration and then fail probe before devl_register() is reached. That flow can happen for SFs. The child devlink gets linked to its parent before registration, then a later probe error calls devlink_free() directly. Since the instance was never registered, devl_unregister() is not called and devlink->rel is leaked. Release any pending relation from devlink_free() as well. The registered path is unchanged because devl_unregister() already clears devlink->rel before devlink_free() runs.",
    "evidence": "osv:CVE-2026-53261",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.94",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.36",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.0.13",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-53261",
      "aliases": [
        "CVE-2026-53261"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c137743bce02b18c1537d4681aa515f7b80bf0a8"
                },
                {
                  "fixed": "a9137286884703113b1c9e6403bd6d7d97b14754"
                },
                {
                  "fixed": "927f96861f939c0b517d13ed27bf4fabbfc1cfb3"
                },
                {
                  "fixed": "11324d52b0c63f4f202b35793c6507a575e9a689"
                },
                {
                  "fixed": "3522b21fd7e1863d0734537737bd59f1b90d0190"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53261.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.94"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.36"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.0.13"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53261.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.181200801Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/11324d52b0c63f4f202b35793c6507a575e9a689",
        "https://git.kernel.org/stable/c/3522b21fd7e1863d0734537737bd59f1b90d0190",
        "https://git.kernel.org/stable/c/927f96861f939c0b517d13ed27bf4fabbfc1cfb3",
        "https://git.kernel.org/stable/c/a9137286884703113b1c9e6403bd6d7d97b14754",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53261.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-53261",
        "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/2026/53xxx/CVE-2026-53261.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-53261",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 503188,
  "published_at": "2026-06-25T08:39:49.891+00:00"
}