{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-80618",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-80618"
  ],
  "published": "2026-08-28T06:50:33Z",
  "summary": "drm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free\n\namdgpu_amdkfd_gpuvm_free_memory_of_gpu() unpinned DOORBELL and MMIO\nremap BOs (which are pinned at allocation time) before checking whether\nthe BO is still mapped to the GPU. When the BO is still mapped, the\nfunction returns -EBUSY and leaves the BO alive, but it has already\nbeen unpinned. The BO is then unpinned again when it is finally freed\nduring process teardown, triggering a ttm_bo_unpin() underflow warning:\n\n  WARNING: CPU: 18 PID: 15066 at ttm/ttm_bo.c:650 amdttm_bo_unpin+0x6d/0x80 [amdttm]\n  Workqueue: kfd_process_wq kfd_process_wq_release [amdgpu]\n  RIP: 0010:amdttm_bo_unpin+0x6d/0x80 [amdttm]\n  Call Trace:\n   amdgpu_bo_unpin+0x1a/0x90 [amdgpu]\n   amdgpu_amdkfd_gpuvm_unpin_bo+0x31/0xb0 [amdgpu]\n   amdgpu_amdkfd_gpuvm_free_memory_of_gpu+0x3bf/0x460 [amdgpu]\n   kfd_process_free_outstanding_kfd_bos+0xd4/0x170 [amdgpu]\n   kfd_process_wq_release+0x109/0x1b0 [amdgpu]\n   process_one_work+0x1e2/0x3b0\n   worker_thread+0x50/0x3a0\n   kthread+0xdd/0x100\n   ret_from_fork+0x29/0x50\n\nMove the unpin after the mapped_to_gpu_memory check so it only happens\nonce we are committed to freeing the BO.\n\n(cherry picked from commit 927c5b2defb9b09856444d94bebfd056a002bd75)",
  "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": "6.1.178",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-80618"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/461ae406ae12107ebb321cabe561434c27aaea58"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/283e77af49fda96aaa57709fc5408b55ffec075e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c055a2088b719e9a4b580685e0ca97f9554a41a8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0e27d92f69b8e4c750a4b181cc05a86b9338c4f5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1d12ae8b079e173107abec0e5817332954c8e95f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3f0cc1735273a57c5116710cf0202e12152f59cc"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-28T06:50:33Z"
  }
}