thunderbolt: Fix NULL pointer dereference in tb_port_update_credits()

{
  "id": "18ebd15956a403433e1e70fe624fed6f90dba0396bf2b1708ec020205d665332",
  "url": "https://osv.dev/vulnerability/CVE-2024-27060",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "thunderbolt: Fix NULL pointer dereference in tb_port_update_credits()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: thunderbolt: Fix NULL pointer dereference in tb_port_update_credits() Olliver reported that his system crashes when plugging in Thunderbolt 1 device: BUG: kernel NULL pointer dereference, address: 0000000000000020 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI RIP: 0010:tb_port_do_update_credits+0x1b/0x130 [thunderbolt] Call Trace: ? __die+0x23/0x70 ? page_fault_oops+0x171/0x4e0 ? exc_page_fault+0x7f/0x180 ? asm_exc_page_fault+0x26/0x30 ? tb_port_do_update_credits+0x1b/0x130 ? tb_switch_update_link_attributes+0x83/0xd0 tb_switch_add+0x7a2/0xfe0 tb_scan_port+0x236/0x6f0 tb_handle_hotplug+0x6db/0x900 process_one_work+0x171/0x340 worker_thread+0x27b/0x3a0 ? __pfx_worker_thread+0x10/0x10 kthread+0xe5/0x120 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x31/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 This is due the fact that some Thunderbolt 1 devices only have one lane adapter. Fix this by checking for the lane 1 before we read its credits.",
    "evidence": "osv:CVE-2024-27060",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.7.12",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-27060",
      "aliases": [
        "CVE-2024-27060"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9b6933e9bddc04655a894c74cd5c62202a5e3d89"
                },
                {
                  "fixed": "440fba897c5ae32d7df1f1d609dbb19e2bba7fbb"
                }
              ]
            },
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "81af2952e60603d12415e1a6fd200f8073a2ad8b"
                },
                {
                  "fixed": "ce64ba1f6ec3439e4b4d880b4db99673f4507228"
                },
                {
                  "fixed": "d3d17e23d1a0d1f959b4fa55b35f1802d9c584fa"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-27060.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.7.12"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-27060.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.644091556Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/440fba897c5ae32d7df1f1d609dbb19e2bba7fbb",
        "https://git.kernel.org/stable/c/ce64ba1f6ec3439e4b4d880b4db99673f4507228",
        "https://git.kernel.org/stable/c/d3d17e23d1a0d1f959b4fa55b35f1802d9c584fa",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/27xxx/CVE-2024-27060.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-27060",
        "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/2024/27xxx/CVE-2024-27060.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-27060",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 493191,
  "published_at": "2024-05-01T13:00:13.995+00:00"
}