ghsa-qcm7-vmfg-h8xw
Vulnerability from github
Published
2024-09-04 21:30
Modified
2024-12-09 15:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

drm/amd/display: Don't refer to dc_sink in is_dsc_need_re_compute

[Why] When unplug one of monitors connected after mst hub, encounter null pointer dereference.

It's due to dc_sink get released immediately in early_unregister() or detect_ctx(). When commit new state which directly referring to info stored in dc_sink will cause null pointer dereference.

[how] Remove redundant checking condition. Relevant condition should already be covered by checking if dsc_aux is null or not. Also reset dsc_aux to NULL when the connector is disconnected.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-44955"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-09-04T19:15:30Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Don\u0027t refer to dc_sink in is_dsc_need_re_compute\n\n[Why]\nWhen unplug one of monitors connected after mst hub, encounter null pointer dereference.\n\nIt\u0027s due to dc_sink get released immediately in early_unregister() or detect_ctx(). When\ncommit new state which directly referring to info stored in dc_sink will cause null pointer\ndereference.\n\n[how]\nRemove redundant checking condition. Relevant condition should already be covered by checking\nif dsc_aux is null or not. Also reset dsc_aux to NULL when the connector is disconnected.",
  "id": "GHSA-qcm7-vmfg-h8xw",
  "modified": "2024-12-09T15:31:33Z",
  "published": "2024-09-04T21:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-44955"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/39b217193729aa45eded8de24d9245468a0c0263"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7e65cab54a89f4df54110f0b44c4ade93d1a911"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fcf6a49d79923a234844b8efe830a61f3f0584e4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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