ghsa-g6q3-47r5-q8fc
Vulnerability from github
Published
2024-03-01 00:30
Modified
2024-12-10 18:31
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

drm: bridge/panel: Cleanup connector on bridge detach

If we don't call drm_connector_cleanup() manually in panel_bridge_detach(), the connector will be cleaned up with the other DRM objects in the call to drm_mode_config_cleanup(). However, since our drm_connector is devm-allocated, by the time drm_mode_config_cleanup() will be called, our connector will be long gone. Therefore, the connector must be cleaned up when the bridge is detached to avoid use-after-free conditions.

v2: Cleanup connector only if it was created

v3: Add FIXME

v4: (Use connector->dev) directly in if() block

Show details on source website

To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2021-47063"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-02-29T23:15:07Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: bridge/panel: Cleanup connector on bridge detach\n\nIf we don\u0027t call drm_connector_cleanup() manually in\npanel_bridge_detach(), the connector will be cleaned up with the other\nDRM objects in the call to drm_mode_config_cleanup(). However, since our\ndrm_connector is devm-allocated, by the time drm_mode_config_cleanup()\nwill be called, our connector will be long gone. Therefore, the\nconnector must be cleaned up when the bridge is detached to avoid\nuse-after-free conditions.\n\nv2: Cleanup connector only if it was created\n\nv3: Add FIXME\n\nv4: (Use connector-\u003edev) directly in if() block",
  "id": "GHSA-g6q3-47r5-q8fc",
  "modified": "2024-12-10T18:31:06Z",
  "published": "2024-03-01T00:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47063"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/18149b420c9bd93c443e8d1f48a063d71d9f6aa1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d906839d321c2efbf3fed4bc31ffd9ff55b75c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98d7d76a74e48ec3ddf2e23950adff7edcab9327"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce450934a00cf896e648fde08d0bd1426653d7a2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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