CVE-2026-53136 (GCVE-0-2026-53136)
Vulnerability from cvelistv5
Published
2026-06-25 08:38
Modified
2026-06-29 04:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Clamp VBIOS HDMI retimer register count to array size [Why & How] The VBIOS integrated info tables (v1_11 and v2_1) contain HdmiRegNum and Hdmi6GRegNum fields that are used as loop bounds when copying retimer I2C register settings into fixed-size arrays (dp*_ext_hdmi_reg_settings[9] and dp*_ext_hdmi_6g_reg_settings[3]). These u8 fields are not validated before use, so a malformed VBIOS can specify values up to 255, causing an out-of-bounds heap write during driver probe. Clamp each register count to the destination array size using min_t() before the copy loops, in both get_integrated_info_v11() and get_integrated_info_v2_1(). (cherry picked from commit 5a7f0ef90195940c54b0f5bb85b87da55f038c69)
Impacted products
Vendor Product Version
Linux Linux Version: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a
Version: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a
Version: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a
Version: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a
Version: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a
Version: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a
Version: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Clamp VBIOS HDMI retimer register count to array size\n\n[Why \u0026 How]\nThe VBIOS integrated info tables (v1_11 and v2_1) contain HdmiRegNum and\nHdmi6GRegNum fields that are used as loop bounds when copying retimer I2C\nregister settings into fixed-size arrays (dp*_ext_hdmi_reg_settings[9]\nand dp*_ext_hdmi_6g_reg_settings[3]). These u8 fields are not validated\nbefore use, so a malformed VBIOS can specify values up to 255, causing an\nout-of-bounds heap write during driver probe.\n\nClamp each register count to the destination array size using min_t()\nbefore the copy loops, in both get_integrated_info_v11() and\nget_integrated_info_v2_1().\n\n(cherry picked from commit 5a7f0ef90195940c54b0f5bb85b87da55f038c69)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-29T04:18:52.196Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/029571d51140650783be4fb98fe7cb4754752086"
        },
        {
          "url": "https://git.kernel.org/stable/c/5f8b39452fb16f507c9e4d8b4a83ce27e893307c"
        },
        {
          "url": "https://git.kernel.org/stable/c/4d1c3c26c2ab1842e139e61983395d64bd2e518b"
        },
        {
          "url": "https://git.kernel.org/stable/c/d6be8e59af412623e3d874be3a048406c0edfe60"
        },
        {
          "url": "https://git.kernel.org/stable/c/3f32d52ec604c659725d865cf8cc6a17a33f9c6a"
        },
        {
          "url": "https://git.kernel.org/stable/c/8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117"
        },
        {
          "url": "https://git.kernel.org/stable/c/fb0707ce00eef4e2d60c3020e1c0432739703e4a"
        }
      ],
      "title": "drm/amd/display: Clamp VBIOS HDMI retimer register count to array size",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53136",
    "datePublished": "2026-06-25T08:38:25.097Z",
    "dateReserved": "2026-06-09T07:44:35.387Z",
    "dateUpdated": "2026-06-29T04:18:52.196Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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