CVE-2022-50036 (GCVE-0-2022-50036)
Vulnerability from cvelistv5
Published
2025-06-18 11:01
Modified
2025-06-18 11:01
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/82a1356a933d8443139f8886f11b63c974a09a67
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/98e28de472ef248352f04f87e29e634ebb0ec240
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a1e7908f78f5a7f53f8cd83c7dcdfec974c95f26
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fb837f5b83461624e525727a8f4add14b201147e
Impacted products
Vendor Product Version
Linux Linux Version: 133add5b5ad42b7bb5fcd59d681aef6475d08600
Version: 133add5b5ad42b7bb5fcd59d681aef6475d08600
Version: 133add5b5ad42b7bb5fcd59d681aef6475d08600
Version: 133add5b5ad42b7bb5fcd59d681aef6475d08600
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   Linux Linux Version: 4.18
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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c"
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          "lang": "en",
          "value": "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."
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    "cveId": "CVE-2022-50036",
    "datePublished": "2025-06-18T11:01:37.844Z",
    "dateReserved": "2025-06-18T10:57:27.396Z",
    "dateUpdated": "2025-06-18T11:01:37.844Z",
    "state": "PUBLISHED"
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}


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