FKIE_CVE-2026-53136

Vulnerability from fkie_nvd - Published: 2026-06-25 09:16 - Updated: 2026-06-30 14:44
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)
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/029571d51140650783be4fb98fe7cb4754752086
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3f32d52ec604c659725d865cf8cc6a17a33f9c6a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4d1c3c26c2ab1842e139e61983395d64bd2e518b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5f8b39452fb16f507c9e4d8b4a83ce27e893307c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d6be8e59af412623e3d874be3a048406c0edfe60
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fb0707ce00eef4e2d60c3020e1c0432739703e4a
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "029571d51140650783be4fb98fe7cb4754752086",
              "status": "affected",
              "version": "1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a",
              "versionType": "git"
            },
            {
              "lessThan": "5f8b39452fb16f507c9e4d8b4a83ce27e893307c",
              "status": "affected",
              "version": "1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a",
              "versionType": "git"
            },
            {
              "lessThan": "4d1c3c26c2ab1842e139e61983395d64bd2e518b",
              "status": "affected",
              "version": "1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a",
              "versionType": "git"
            },
            {
              "lessThan": "d6be8e59af412623e3d874be3a048406c0edfe60",
              "status": "affected",
              "version": "1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a",
              "versionType": "git"
            },
            {
              "lessThan": "3f32d52ec604c659725d865cf8cc6a17a33f9c6a",
              "status": "affected",
              "version": "1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a",
              "versionType": "git"
            },
            {
              "lessThan": "8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117",
              "status": "affected",
              "version": "1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a",
              "versionType": "git"
            },
            {
              "lessThan": "fb0707ce00eef4e2d60c3020e1c0432739703e4a",
              "status": "affected",
              "version": "1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "lessThan": "4.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.176",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.143",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.94",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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)"
    }
  ],
  "id": "CVE-2026-53136",
  "lastModified": "2026-06-30T14:44:27.313",
  "metrics": {},
  "published": "2026-06-25T09:16:30.910",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/029571d51140650783be4fb98fe7cb4754752086"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3f32d52ec604c659725d865cf8cc6a17a33f9c6a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4d1c3c26c2ab1842e139e61983395d64bd2e518b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5f8b39452fb16f507c9e4d8b4a83ce27e893307c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d6be8e59af412623e3d874be3a048406c0edfe60"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fb0707ce00eef4e2d60c3020e1c0432739703e4a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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