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

Vulnerability from cvelistv5 – Published: 2026-06-25 08:38 – Updated: 2026-06-29 04:18
VLAI
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
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted 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)
Create a notification for this product.
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)
Create a notification for this product.
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-26T07:34:13+00:00",
      "cve": "CVE-2026-53136",
      "id": "CVE-2026-53136",
      "initial_release_date": "2026-06-25T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amd/display: Clamp VBIOS HDMI retimer register count to array size",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53136.json",
      "version": "3"
    }
  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • 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.