ghsa-fmqm-f3m4-fg43
Vulnerability from github
Published
2024-05-22 09:31
Modified
2024-10-31 18:31
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: mxsfb: Fix NULL pointer dereference crash on unload

The mxsfb->crtc.funcs may already be NULL when unloading the driver, in which case calling mxsfb_irq_disable() via drm_irq_uninstall() from mxsfb_unload() leads to NULL pointer dereference.

Since all we care about is masking the IRQ and mxsfb->base is still valid, just use that to clear and mask the IRQ.

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47471"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-22T07:15:11Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: mxsfb: Fix NULL pointer dereference crash on unload\n\nThe mxsfb-\u003ecrtc.funcs may already be NULL when unloading the driver,\nin which case calling mxsfb_irq_disable() via drm_irq_uninstall() from\nmxsfb_unload() leads to NULL pointer dereference.\n\nSince all we care about is masking the IRQ and mxsfb-\u003ebase is still\nvalid, just use that to clear and mask the IRQ.",
  "id": "GHSA-fmqm-f3m4-fg43",
  "modified": "2024-10-31T18:31:16Z",
  "published": "2024-05-22T09:31:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47471"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3cfc183052c3dbf8eae57b6c1685dab00ed3db4a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0e6db0656ddfd8bb57303c2ef61ee1c1cc694a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f40c2281d2c0674d32ba732fee45222d76495472"
    }
  ],
  "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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