CVE-2026-53137 (GCVE-0-2026-53137)
Vulnerability from cvelistv5
Published
2026-06-25 08:38
Modified
2026-06-25 08:38
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size [Why & How] During HDCP 2.x repeater authentication over HDMI, the driver reads the sink's RxStatus register and extracts a 10-bit message size field (max value 1023). This value is used as the read length for the ReceiverID list without being clamped to the size of the destination buffer rx_id_list[177]. A malicious HDMI repeater could advertise a message size larger than the buffer, causing an out-of-bounds write during the I2C read. Clamp the read length in mod_hdcp_read_rx_id_list() to the size of the rx_id_list buffer, matching the approach already used in the DP branch. (cherry picked from commit 229212219e4247d9486f8ba41ef087358490be09)
References
Impacted products
Vendor Product Version
Linux Linux Version: eff682f83c9c2030761e7536c5d97e1b20f71c15
Version: eff682f83c9c2030761e7536c5d97e1b20f71c15
Version: eff682f83c9c2030761e7536c5d97e1b20f71c15
Version: eff682f83c9c2030761e7536c5d97e1b20f71c15
Version: eff682f83c9c2030761e7536c5d97e1b20f71c15
Version: eff682f83c9c2030761e7536c5d97e1b20f71c15
Version: eff682f83c9c2030761e7536c5d97e1b20f71c15
Version: eff682f83c9c2030761e7536c5d97e1b20f71c15
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c"
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      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size\n\n[Why \u0026 How]\nDuring HDCP 2.x repeater authentication over HDMI, the driver reads the\nsink\u0027s RxStatus register and extracts a 10-bit message size field (max\nvalue 1023). This value is used as the read length for the ReceiverID\nlist without being clamped to the size of the destination buffer\nrx_id_list[177]. A malicious HDMI repeater could advertise a message\nsize larger than the buffer, causing an out-of-bounds write during the\nI2C read.\n\nClamp the read length in mod_hdcp_read_rx_id_list() to the size of the\nrx_id_list buffer, matching the approach already used in the DP branch.\n\n(cherry picked from commit 229212219e4247d9486f8ba41ef087358490be09)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-25T08:38:25.977Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3c4444aec06c74fbc05661f370954ac814963c38"
        },
        {
          "url": "https://git.kernel.org/stable/c/91fb41218c413989d8b6c837748751454b452d68"
        },
        {
          "url": "https://git.kernel.org/stable/c/964e50ef7b8f09815a7d05b8326af700f8d5bc96"
        },
        {
          "url": "https://git.kernel.org/stable/c/79e0273272a05fb26f9b1e55bf1a52eefc3b7b35"
        },
        {
          "url": "https://git.kernel.org/stable/c/bfba882cfcd08f6540f72f48e786b6404f5d2c5b"
        },
        {
          "url": "https://git.kernel.org/stable/c/1906064d50d194a145486e5caf3db3e708b6f6ef"
        },
        {
          "url": "https://git.kernel.org/stable/c/98cfb7530ea91d8e5e928285cdce58e1131f6e83"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0f3981c43b32cadfe373d636d9e9ca522bb3702"
        }
      ],
      "title": "drm/amd/display: Clamp HDMI HDCP2 rx_id_list read to buffer size",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53137",
    "datePublished": "2026-06-25T08:38:25.977Z",
    "dateReserved": "2026-06-09T07:44:35.387Z",
    "dateUpdated": "2026-06-25T08:38:25.977Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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