Vulnerability-Lookup

GHSA-RG3C-J3J2-X6PC

Vulnerability from github – Published: 2026-06-25 09:31 – Updated: 2026-06-25 09:31

Details

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)

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{
  "affected": [],
  "aliases": [
    "CVE-2026-53136"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-25T09:16:30Z",
    "severity": null
  },
  "details": "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": "GHSA-rg3c-j3j2-x6pc",
  "modified": "2026-06-25T09:31:18Z",
  "published": "2026-06-25T09:31:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53136"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/029571d51140650783be4fb98fe7cb4754752086"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f32d52ec604c659725d865cf8cc6a17a33f9c6a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d1c3c26c2ab1842e139e61983395d64bd2e518b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f8b39452fb16f507c9e4d8b4a83ce27e893307c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6be8e59af412623e3d874be3a048406c0edfe60"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb0707ce00eef4e2d60c3020e1c0432739703e4a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-53136 (GCVE-0-2026-53136)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-06-29 04:18

Title

drm/amd/display: Clamp VBIOS HDMI retimer register count to array size

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)

Severity

No CVSS data available.

Assigner

Linux

References

7 references

URL	Tags
https://git.kernel.org/stable/c/029571d5114065078…
https://git.kernel.org/stable/c/5f8b39452fb16f507…
https://git.kernel.org/stable/c/4d1c3c26c2ab1842e…
https://git.kernel.org/stable/c/d6be8e59af412623e…
https://git.kernel.org/stable/c/3f32d52ec604c6597…
https://git.kernel.org/stable/c/8aaa7e317fbd4beb9…
https://git.kernel.org/stable/c/fb0707ce00eef4e2d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a , < 029571d51140650783be4fb98fe7cb4754752086 (git) Affected: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a , < 5f8b39452fb16f507c9e4d8b4a83ce27e893307c (git) Affected: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a , < 4d1c3c26c2ab1842e139e61983395d64bd2e518b (git) Affected: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a , < d6be8e59af412623e3d874be3a048406c0edfe60 (git) Affected: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a , < 3f32d52ec604c659725d865cf8cc6a17a33f9c6a (git) Affected: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a , < 8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117 (git) Affected: 1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a , < fb0707ce00eef4e2d60c3020e1c0432739703e4a (git)
Linux	Linux	Affected: 4.15 Unaffected: 0 , < 4.15 (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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            },
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              "status": "unaffected",
              "version": "0",
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            },
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
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              "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"
            }
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        }
      ],
      "cpeApplicability": [
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          "nodes": [
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          "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)"
        }
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        "dateUpdated": "2026-06-29T04:18:52.196Z",
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        },
        {
          "url": "https://git.kernel.org/stable/c/fb0707ce00eef4e2d60c3020e1c0432739703e4a"
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    "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",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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GHSA-RG3C-J3J2-X6PC

CVE-2026-53136 (GCVE-0-2026-53136)

Tags

Sightings

Nomenclature