{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "77466b798d59d6761501ff36094cf430d3876549"
            },
            {
              "fixed": "fcd19bc829eca237742a3b123f839ad1c473ec85"
            },
            {
              "fixed": "a797a2331e5d2ecdbccbae222ea71c759fdb2c2b"
            },
            {
              "fixed": "aefdbd574a362dcf7569bada6d72f64a006b9fb9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.14.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97947.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/amd_node: Fix potential NULL pointer dereference\n\namd_smn_read/write() are exported functions around __amd_smn_rw(), so\nthey are always available even if amd_smn_init() fails. In that case,\n'amd_roots' is NULL and __amd_smn_rw() will access uninitialized memory.\n\nThen, commit:\n\n  83518453074d (\"x86/amd_node: Add SMN offsets to exclusive region access\")\n\nadded the 'smn_exclusive' flag, which indicated the calls to\npci_request_config_region_exclusive() succeeded, to prevent\nconcurrent userspace access.\n\nCommit:\n\n  0a4b61d9c2e4 (\"x86/amd_node: Fix AMD root device caching\")\n\nre-ordered initialization so pci_request_config_region_exclusive() is\ncalled earlier and a failure exits amd_smn_init() before allocating\n'amd_roots'. The setting of 'smn_exclusive' moved to the end of\namd_smn_init(), after 'amd_roots' is allocated. It became redundant\nand can be removed.\n\nReplace 'smn_exclusive' with directly checking 'amd_roots', to fix a\npotential NULL pointer dereference and to simplify the logic.\n\n  [ bp: Reorg commit message, touchup comment. ]\n  [ mingo: Rebase \u0026 further touchups. ]",
  "id": "CVE-2026-97947",
  "modified": "2026-09-27T03:30:28.084449233Z",
  "published": "2026-09-25T10:22:57.163Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a797a2331e5d2ecdbccbae222ea71c759fdb2c2b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aefdbd574a362dcf7569bada6d72f64a006b9fb9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fcd19bc829eca237742a3b123f839ad1c473ec85"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97947.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97947"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "x86/amd_node: Fix potential NULL pointer dereference"
}