{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "d25e35bc26c3ca8cd728101545cfb3e86a5d7431"
            },
            {
              "fixed": "461ae406ae12107ebb321cabe561434c27aaea58"
            },
            {
              "fixed": "283e77af49fda96aaa57709fc5408b55ffec075e"
            },
            {
              "fixed": "c055a2088b719e9a4b580685e0ca97f9554a41a8"
            },
            {
              "fixed": "0e27d92f69b8e4c750a4b181cc05a86b9338c4f5"
            },
            {
              "fixed": "1d12ae8b079e173107abec0e5817332954c8e95f"
            },
            {
              "fixed": "3f0cc1735273a57c5116710cf0202e12152f59cc"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.17.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80618.json"
  },
  "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)",
  "id": "CVE-2026-80618",
  "modified": "2026-08-30T03:30:36.809921532Z",
  "published": "2026-08-28T06:48:38.112Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0e27d92f69b8e4c750a4b181cc05a86b9338c4f5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d12ae8b079e173107abec0e5817332954c8e95f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/283e77af49fda96aaa57709fc5408b55ffec075e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f0cc1735273a57c5116710cf0202e12152f59cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/461ae406ae12107ebb321cabe561434c27aaea58"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c055a2088b719e9a4b580685e0ca97f9554a41a8"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80618.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80618"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "drm/amdkfd: Avoid double-unpin of DOORBELL/MMIO BOs on free"
}