ghsa-jr2f-hw4r-48cj
Vulnerability from github
Published
2025-06-18 12:30
Modified
2025-06-18 12:30
Details

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

drm/sun4i: dsi: Prevent underflow when computing packet sizes

Currently, the packet overhead is subtracted using unsigned arithmetic. With a short sync pulse, this could underflow and wrap around to near the maximal u16 value. Fix this by using signed subtraction. The call to max() will correctly handle any negative numbers that are produced.

Apply the same fix to the other timings, even though those subtractions are less likely to underflow.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-50036"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:32Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sun4i: dsi: Prevent underflow when computing packet sizes\n\nCurrently, the packet overhead is subtracted using unsigned arithmetic.\nWith a short sync pulse, this could underflow and wrap around to near\nthe maximal u16 value. Fix this by using signed subtraction. The call to\nmax() will correctly handle any negative numbers that are produced.\n\nApply the same fix to the other timings, even though those subtractions\nare less likely to underflow.",
  "id": "GHSA-jr2f-hw4r-48cj",
  "modified": "2025-06-18T12:30:44Z",
  "published": "2025-06-18T12:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-50036"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82a1356a933d8443139f8886f11b63c974a09a67"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98e28de472ef248352f04f87e29e634ebb0ec240"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1e7908f78f5a7f53f8cd83c7dcdfec974c95f26"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb837f5b83461624e525727a8f4add14b201147e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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