media: v4l2-async: Unregister sub-device if asc_list is empty

{
  "id": "cb68aa735b9aac0df18de973b8378bed576fd7b189363e5662aba4c5db479f0e",
  "url": "https://osv.dev/vulnerability/CVE-2026-93101",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "media: v4l2-async: Unregister sub-device if asc_list is empty",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: media: v4l2-async: Unregister sub-device if asc_list is empty When my em28xx USB device that uses the i2c tvp5150 driver is disconnected, it crashes. The cause is that the tvp5150 i2c module uses v4l2_async, but the em28xx driver does not since it predates v4l2_async. In that corner case sd->asc_list is empty, so v4l2_async_unregister_subdev() never calls v4l2_device_unregister_subdev(). Modify the code so that, if sd->asc_list is empty, v4l2_device_unregister_subdev() is still called.",
    "evidence": "osv:CVE-2026-93101",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.157",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.110",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.52",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-93101",
      "aliases": [
        "CVE-2026-93101"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "28a1295795d85a25f2e7dd391c43969e95fcb341"
                },
                {
                  "fixed": "c7201bd08cad791858337e33ffcd90d8ae4147c2"
                },
                {
                  "fixed": "e190320cebe921f99973c984ac53f317061a011f"
                },
                {
                  "fixed": "65e55f34fb2d61cb4f8a5dfcb93848af2aea0f32"
                },
                {
                  "fixed": "9fb74dce5c650cb23b60f6ba0ffcd5024e948a75"
                },
                {
                  "fixed": "4e72f13d58c4245c177a9d5f54579345554f354d"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93101.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.6.0"
                },
                {
                  "fixed": "6.6.157"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.110"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.52"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93101.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.199747606Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/4e72f13d58c4245c177a9d5f54579345554f354d",
        "https://git.kernel.org/stable/c/65e55f34fb2d61cb4f8a5dfcb93848af2aea0f32",
        "https://git.kernel.org/stable/c/9fb74dce5c650cb23b60f6ba0ffcd5024e948a75",
        "https://git.kernel.org/stable/c/c7201bd08cad791858337e33ffcd90d8ae4147c2",
        "https://git.kernel.org/stable/c/e190320cebe921f99973c984ac53f317061a011f",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93101.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-93101",
        "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/2026/93xxx/CVE-2026-93101.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-93101",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 489743,
  "published_at": "2026-09-17T16:11:13.738+00:00"
}