drm/ttm: check null pointer before accessing when swapping

{
  "id": "6019772a19310178765ed7d250a66ec708a93a0ed2693a98e5c21bef04fd72a1",
  "url": "https://osv.dev/vulnerability/CVE-2023-53352",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/ttm: check null pointer before accessing when swapping",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drm/ttm: check null pointer before accessing when swapping Add a check to avoid null pointer dereference as below: [ 90.002283] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 90.002292] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 90.002346] ? exc_general_protection+0x159/0x240 [ 90.002352] ? asm_exc_general_protection+0x26/0x30 [ 90.002357] ? ttm_bo_evict_swapout_allowable+0x322/0x5e0 [ttm] [ 90.002365] ? ttm_bo_evict_swapout_allowable+0x42e/0x5e0 [ttm] [ 90.002373] ttm_bo_swapout+0x134/0x7f0 [ttm] [ 90.002383] ? __pfx_ttm_bo_swapout+0x10/0x10 [ttm] [ 90.002391] ? lock_acquire+0x44d/0x4f0 [ 90.002398] ? ttm_device_swapout+0xa5/0x260 [ttm] [ 90.002412] ? lock_acquired+0x355/0xa00 [ 90.002416] ? do_raw_spin_trylock+0xb6/0x190 [ 90.002421] ? __pfx_lock_acquired+0x10/0x10 [ 90.002426] ? ttm_global_swapout+0x25/0x210 [ttm] [ 90.002442] ttm_device_swapout+0x198/0x260 [ttm] [ 90.002456] ? __pfx_ttm_device_swapout+0x10/0x10 [ttm] [ 90.002472] ttm_global_swapout+0x75/0x210 [ttm] [ 90.002486] ttm_tt_populate+0x187/0x3f0 [ttm] [ 90.002501] ttm_bo_handle_move_mem+0x437/0x590 [ttm] [ 90.002517] ttm_bo_validate+0x275/0x430 [ttm] [ 90.002530] ? __pfx_ttm_bo_validate+0x10/0x10 [ttm] [ 90.002544] ? kasan_save_stack+0x33/0x60 [ 90.002550] ? kasan_set_track+0x25/0x30 [ 90.002554] ? __kasan_kmalloc+0x8f/0xa0 [ 90.002558] ? amdgpu_g",
    "evidence": "osv:CVE-2023-53352",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.126",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.45",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.4.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-53352",
      "aliases": [
        "CVE-2023-53352"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
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            "v5.15.124",
            "v6.1.44",
            "v6.1.43",
            "v6.4.9",
            "v6.4.8"
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            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:44.000715641Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1fdd16d89c01336d9a942b5f03673c17d401da87",
        "https://git.kernel.org/stable/c/2dedcf414bb01b8d966eb445db1d181d92304fb2",
        "https://git.kernel.org/stable/c/49b3b979e79faef129605018ad82aa0f2258f2f7",
        "https://git.kernel.org/stable/c/8089eb93d6787dbf348863e935698b4610d90321",
        "https://git.kernel.org/stable/c/d39971d902d067b4dc366981b75b17c8c57ed5d1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53352.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-53352",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53352.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-53352",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 511672,
  "published_at": "2025-09-17T14:56:42.698+00:00"
}