{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "9d0af8b4def0de6b734ec8db08e96da0458facb6"
            },
            {
              "fixed": "67bc3647e418e23dc0d17604bdba634a73de809f"
            },
            {
              "fixed": "a343d028ad6c174da8dc6af560c51e6d140a6727"
            },
            {
              "fixed": "6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa"
            },
            {
              "fixed": "f5988b5c300a32ff751724ffd33d5a8d5873e4a7"
            },
            {
              "fixed": "ea772a440d56b285f4d491affac50ecd41f6b402"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.13.0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68102.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix aperture mapping leak\n\namdgpu_pci_remove() calls drm_dev_unplug() before invoking the driver\nfini routines. This causes drm_dev_enter() in amdgpu_ttm_fini() to\nalways return false, so iounmap(aper_base_kaddr) never runs on normal\ndriver unload, leaving an orphaned entry in the x86 PAT interval tree.\n\nOn connected_to_cpu hardware, the aperture is mapped write-back (WB) via\nioremap_cache(). On reload, IP discovery calls memremap(..., MEMREMAP_WC)\nover the same range. The WC vs WB conflict causes:\n\n  ioremap error for 0x..., requested 0x1, got 0x0\n  amdgpu: discovery failed: -2\n\nFix by switching to devres-managed mappings so cleanup is guaranteed\nregardless of drm_dev_enter() state:\n\n- connected_to_cpu path: devm_memremap(MEMREMAP_WB). For\n  IORESOURCE_SYSTEM_RAM ranges this takes the try_ram_remap() shortcut,\n  returning __va(offset) from the existing kernel direct map. No new\n  ioremap VA or PAT entry is created, so there is nothing to orphan.\n\n- dGPU path: devm_ioremap_wc() registers iounmap() as a devres action,\n  guaranteeing cleanup at device_del() time.\n\nAlso remove iounmap(aper_base_kaddr) from amdgpu_device_unmap_mmio()\nsince the mapping is now devres-owned.\n\nv2: Remove redundant x86_64 guard (Lijo)\n\n(cherry picked from commit d871e99879cb5fd1fa798b006b4888887e63a17a)",
  "id": "CVE-2026-68102",
  "modified": "2026-08-18T03:31:21.278554091Z",
  "published": "2026-08-10T11:58:18.093Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6405c4e75b3bcf0e72bd7a0ff5f1ed0c475e23aa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/67bc3647e418e23dc0d17604bdba634a73de809f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a343d028ad6c174da8dc6af560c51e6d140a6727"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea772a440d56b285f4d491affac50ecd41f6b402"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f5988b5c300a32ff751724ffd33d5a8d5873e4a7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68102.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68102"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "drm/amdgpu: fix aperture mapping leak"
}