tpm: Use auth only after NULL check in tpm_buf_check_hmac_response()

{
  "id": "06d69f8b7f3d21ed28cb3418661d7c92b1c70f7a1cb4ecbb402556f9e320de85",
  "url": "https://osv.dev/vulnerability/CVE-2024-42255",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "tpm: Use auth only after NULL check in tpm_buf_check_hmac_response()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: tpm: Use auth only after NULL check in tpm_buf_check_hmac_response() Dereference auth after NULL check in tpm_buf_check_hmac_response(). Otherwise, unless tpm2_sessions_init() was called, a call can cause NULL dereference, when TCG_TPM2_HMAC is enabled. [jarkko: adjusted the commit message.]",
    "evidence": "osv:CVE-2024-42255",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.10.1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-42255",
      "aliases": [
        "CVE-2024-42255"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7ca110f2679b7d1f3ac1afc90e6ffbf0af3edf0d"
                },
                {
                  "fixed": "b9afbb9a0c734197c59c43610071041044bf1562"
                },
                {
                  "fixed": "7dc357d343f134bf59815ff6098b93503ec8a23b"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-42255.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.10.0"
                },
                {
                  "fixed": "6.10.1"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-42255.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.619513107Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/7dc357d343f134bf59815ff6098b93503ec8a23b",
        "https://git.kernel.org/stable/c/b9afbb9a0c734197c59c43610071041044bf1562",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42255.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-42255",
        "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/2024/42xxx/CVE-2024-42255.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-42255",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 487453,
  "published_at": "2024-08-08T08:49:15.078+00:00"
}