{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-46204",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-46204"
  ],
  "published": "2026-05-28T09:40:54Z",
  "summary": "drm/amdgpu/vcn4: Prevent OOB reads when parsing IB",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/vcn4: Prevent OOB reads when parsing IB\n\nRewrite the IB parsing to use amdgpu_ib_get_value() which handles the\nbounds checks.",
  "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": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-46204"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1dc005775fb5b3f86464406452b17364f85581d3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d0802a8877d730260d4af4dd4e0b6cde7e0e593f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a6d5563ba1f03a049561cd347574613167294e8d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5c3e8ebad0c9e2354ddfa8f2148dc4f70a3b4bd1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2444eb0ec8283f4a3845eb7febad378476e1ba3c"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.1,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - Reached only via the local amdgpu command-submission ioctl (DRM_IOCTL_AMDGPU_CS) on a DRM render node; no network or adjacent vector is involved.\nAC:L - The attacker fully controls the IB contents, length_dw, and the backing BO size/layout, so positioning the parser so that idx+6..+8 reads cross the BO's last mapped page is reliably reproducible.\nPR:L - Requires the ability to open the DRM render node and submit command buffers, i.e. an unprivileged local user with GPU/graphics-session access; no elevated capability is needed.\nUI:N - The malicious command buffer is submitted directly by the attacker; no action by another user is required.\nS:U - Parsing runs on the CPU in kernel context and the OOB access stays within the kernel's own memory; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The unchecked indexing reads kernel memory beyond the IB buffer object (decode_buffer fields and loop words), an out-of-bounds read of kernel memory that is not strictly limited to a couple of bytes.\nI:N - The flaw is purely an out-of-bounds read; the parser performs no OOB write and the OOB-derived address is re-validated before use, so no kernel data is modifiable.\nA:H - Reading past the BO into an unmapped kernel page faults during command submission, producing a kernel oops/crash that the attacker can trigger on demand."
    }
  }
}