{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-49894",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2024-49894"
  ],
  "published": "2024-10-21T18:02:47Z",
  "summary": "drm/amd/display: Fix index out of bounds in degamma hardware format translation",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix index out of bounds in degamma hardware format translation\n\nFixes index out of bounds issue in\n`cm_helper_translate_curve_to_degamma_hw_format` function. The issue\ncould occur when the index 'i' exceeds the number of transfer function\npoints (TRANSFER_FUNC_POINTS).\n\nThe fix adds a check to ensure 'i' is within bounds before accessing the\ntransfer function points. If 'i' is out of bounds the function returns\nfalse to indicate an error.\n\nReported by smatch:\ndrivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:594 cm_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.red' 1025 <= s32max\ndrivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:595 cm_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.green' 1025 <= s32max\ndrivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:596 cm_helper_translate_curve_to_degamma_hw_format() error: buffer overflow 'output_tf->tf_pts.blue' 1025 <= s32max",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.113",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-49894"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b3dfa878257a7e98830b3009ca5831a01d8f85fc"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f5f6d90087131812c1e4b9d3103f400f1624396d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c130a3c09e3746c1a09ce26c20d21d449d039b1d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c6979719012a90e5b8e3bc31725fbfdd0b9b2b79"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2495c8e272d84685403506833a664fad932e453a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/122e3a7a8c7bcbe3aacddd6103f67f9f36bed473"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2f5da549535be8ccd2ab7c9abac8562ad370b181"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/07078fa5d589a7fbce8f81ea8acf7aa0021ab38e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b7e99058eb2e86aabd7a10761e76cae33d22b49f"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.1,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The code is reached only through the DRM atomic modeset ioctl on /dev/dri/cardN when programming a plane or CRTC degamma LUT; there is no network or remote-peer input on this path.\nAC:L - The attacker performs the atomic commit itself, choosing the degamma LUT blob, transfer function and surface pixel format that drive the TF_TYPE_DISTRIBUTED_POINTS path; no race or uncontrollable precondition is involved.\nPR:L - Requires a local unprivileged user holding DRM master on the AMD display device \u2014 the ordinary logged-in graphical-session user, or any local user opening an unclaimed card; no CAP_SYS_ADMIN or root is needed.\nUI:N - The attacker triggers the whole sequence from its own process via a single atomic commit; no action by another user or victim is required.\nS:U - Any impact stays within the kernel's own security authority on the same host; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - An unbounded index into tf_pts.red/green/blue reads kernel memory beyond the transfer-function arrays, and those values are propagated into the LUT programmed to the display pipeline, so the out-of-bounds read is not confined to a few bytes.\nI:N - The out-of-range index is used only for reads; the write target rgb_resulted[j] stays bounded by hw_points (192) within the 259-entry array, so no kernel data is corrupted.\nA:H - A read far past the end of the transfer-function arrays can touch unmapped memory and oops in the display hardware-sequencer path, taking down the graphics stack and the kernel."
    }
  }
}