char: tpm: Protect tpm_pm_suspend with locks

{
  "id": "3cee924a5be39d9fc4cc855dc76cc5fc3d993bb76523d9643a892a05fc5df78a",
  "url": "https://osv.dev/vulnerability/CVE-2022-48997",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "char: tpm: Protect tpm_pm_suspend with locks",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: char: tpm: Protect tpm_pm_suspend with locks Currently tpm transactions are executed unconditionally in tpm_pm_suspend() function, which may lead to races with other tpm accessors in the system. Specifically, the hw_random tpm driver makes use of tpm_get_random(), and this function is called in a loop from a kthread, which means it's not frozen alongside userspace, and so can race with the work done during system suspend: tpm tpm0: tpm_transmit: tpm_recv: error -52 tpm tpm0: invalid TPM_STS.x 0xff, dumping stack for forensics CPU: 0 PID: 1 Comm: init Not tainted 6.1.0-rc5+ #135 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-20220807_005459-localhost 04/01/2014 Call Trace: tpm_tis_status.cold+0x19/0x20 tpm_transmit+0x13b/0x390 tpm_transmit_cmd+0x20/0x80 tpm1_pm_suspend+0xa6/0x110 tpm_pm_suspend+0x53/0x80 __pnp_bus_suspend+0x35/0xe0 __device_suspend+0x10f/0x350 Fix this by calling tpm_try_get_ops(), which itself is a wrapper around tpm_chip_start(), but takes the appropriate mutex. [Jason: reworked commit message, added metadata]",
    "evidence": "osv:CVE-2022-48997",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.4.226",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.158",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.82",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.0.12",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-48997",
      "aliases": [
        "CVE-2022-48997"
      ],
      "affected": [
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              "type": "GIT",
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                  "fixed": "d699373ac5f3545243d3c73a1ccab77fdef8cec6"
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                  "fixed": "4e0d6c687c925e27fd4bc78a2721d10acf5614d6"
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                  "fixed": "571b6bbbf54d835ea6120f65575cb55cd767e603"
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                  "fixed": "25b78bf98b07ff5aceb9b1e24f72ec0236c5c053"
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                  "fixed": "23393c6461422df5bf8084a086ada9a7e17dc2ba"
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48997.json"
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        },
        {
          "ranges": [
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              "type": "ECOSYSTEM",
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                  "introduced": "5.1.0"
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                  "introduced": "5.16.0"
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                {
                  "fixed": "6.0.12"
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              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48997.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.386338745Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/23393c6461422df5bf8084a086ada9a7e17dc2ba",
        "https://git.kernel.org/stable/c/25b78bf98b07ff5aceb9b1e24f72ec0236c5c053",
        "https://git.kernel.org/stable/c/4e0d6c687c925e27fd4bc78a2721d10acf5614d6",
        "https://git.kernel.org/stable/c/571b6bbbf54d835ea6120f65575cb55cd767e603",
        "https://git.kernel.org/stable/c/d699373ac5f3545243d3c73a1ccab77fdef8cec6",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48997.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-48997",
        "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/2022/48xxx/CVE-2022-48997.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-48997",
        "evidence": "/id"
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    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521980,
  "published_at": "2024-10-21T20:06:12.787+00:00"
}