FKIE_CVE-2026-53137

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 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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1906064d50d194a145486e5caf3db3e708b6f6ef
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3c4444aec06c74fbc05661f370954ac814963c38
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/79e0273272a05fb26f9b1e55bf1a52eefc3b7b35
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/91fb41218c413989d8b6c837748751454b452d68
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/964e50ef7b8f09815a7d05b8326af700f8d5bc96
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/98cfb7530ea91d8e5e928285cdce58e1131f6e83
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bfba882cfcd08f6540f72f48e786b6404f5d2c5b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f0f3981c43b32cadfe373d636d9e9ca522bb3702
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3c4444aec06c74fbc05661f370954ac814963c38",
              "status": "affected",
              "version": "eff682f83c9c2030761e7536c5d97e1b20f71c15",
              "versionType": "git"
            },
            {
              "lessThan": "91fb41218c413989d8b6c837748751454b452d68",
              "status": "affected",
              "version": "eff682f83c9c2030761e7536c5d97e1b20f71c15",
              "versionType": "git"
            },
            {
              "lessThan": "964e50ef7b8f09815a7d05b8326af700f8d5bc96",
              "status": "affected",
              "version": "eff682f83c9c2030761e7536c5d97e1b20f71c15",
              "versionType": "git"
            },
            {
              "lessThan": "79e0273272a05fb26f9b1e55bf1a52eefc3b7b35",
              "status": "affected",
              "version": "eff682f83c9c2030761e7536c5d97e1b20f71c15",
              "versionType": "git"
            },
            {
              "lessThan": "bfba882cfcd08f6540f72f48e786b6404f5d2c5b",
              "status": "affected",
              "version": "eff682f83c9c2030761e7536c5d97e1b20f71c15",
              "versionType": "git"
            },
            {
              "lessThan": "1906064d50d194a145486e5caf3db3e708b6f6ef",
              "status": "affected",
              "version": "eff682f83c9c2030761e7536c5d97e1b20f71c15",
              "versionType": "git"
            },
            {
              "lessThan": "98cfb7530ea91d8e5e928285cdce58e1131f6e83",
              "status": "affected",
              "version": "eff682f83c9c2030761e7536c5d97e1b20f71c15",
              "versionType": "git"
            },
            {
              "lessThan": "f0f3981c43b32cadfe373d636d9e9ca522bb3702",
              "status": "affected",
              "version": "eff682f83c9c2030761e7536c5d97e1b20f71c15",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.259",
              "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 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)"
    }
  ],
  "id": "CVE-2026-53137",
  "lastModified": "2026-06-30T14:44:27.313",
  "metrics": {},
  "published": "2026-06-25T09:16:31.030",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1906064d50d194a145486e5caf3db3e708b6f6ef"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3c4444aec06c74fbc05661f370954ac814963c38"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/79e0273272a05fb26f9b1e55bf1a52eefc3b7b35"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/91fb41218c413989d8b6c837748751454b452d68"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/964e50ef7b8f09815a7d05b8326af700f8d5bc96"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/98cfb7530ea91d8e5e928285cdce58e1131f6e83"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bfba882cfcd08f6540f72f48e786b6404f5d2c5b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f0f3981c43b32cadfe373d636d9e9ca522bb3702"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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