{
   "containers": {
      "cna": {
         "providerMetadata": {
            "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038"
         },
         "descriptions": [
            {
               "lang": "en",
               "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nthunderbolt: Fix NULL pointer dereference in tb_port_update_credits()\n\nOlliver reported that his system crashes when plugging in Thunderbolt 1\ndevice:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000020\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] PREEMPT SMP NOPTI\n RIP: 0010:tb_port_do_update_credits+0x1b/0x130 [thunderbolt]\n Call Trace:\n  <TASK>\n  ? __die+0x23/0x70\n  ? page_fault_oops+0x171/0x4e0\n  ? exc_page_fault+0x7f/0x180\n  ? asm_exc_page_fault+0x26/0x30\n  ? tb_port_do_update_credits+0x1b/0x130\n  ? tb_switch_update_link_attributes+0x83/0xd0\n  tb_switch_add+0x7a2/0xfe0\n  tb_scan_port+0x236/0x6f0\n  tb_handle_hotplug+0x6db/0x900\n  process_one_work+0x171/0x340\n  worker_thread+0x27b/0x3a0\n  ? __pfx_worker_thread+0x10/0x10\n  kthread+0xe5/0x120\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork+0x31/0x50\n  ? __pfx_kthread+0x10/0x10\n  ret_from_fork_asm+0x1b/0x30\n  </TASK>\n\nThis is due the fact that some Thunderbolt 1 devices only have one lane\nadapter. Fix this by checking for the lane 1 before we read its credits."
            }
         ],
         "affected": [
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "unaffected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/thunderbolt/switch.c"
               ],
               "versions": [
                  {
                     "version": "9b6933e9bddc",
                     "lessThan": "440fba897c5a",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "81af2952e606",
                     "lessThan": "ce64ba1f6ec3",
                     "status": "affected",
                     "versionType": "git"
                  },
                  {
                     "version": "81af2952e606",
                     "lessThan": "d3d17e23d1a0",
                     "status": "affected",
                     "versionType": "git"
                  }
               ]
            },
            {
               "product": "Linux",
               "vendor": "Linux",
               "defaultStatus": "affected",
               "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               "programFiles": [
                  "drivers/thunderbolt/switch.c"
               ],
               "versions": [
                  {
                     "version": "6.7",
                     "status": "affected"
                  },
                  {
                     "version": "0",
                     "lessThan": "6.7",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.7.12",
                     "lessThanOrEqual": "6.7.*",
                     "status": "unaffected",
                     "versionType": "custom"
                  },
                  {
                     "version": "6.8",
                     "lessThanOrEqual": "*",
                     "status": "unaffected",
                     "versionType": "original_commit_for_fix"
                  }
               ]
            }
         ],
         "references": [
            {
               "url": "https://git.kernel.org/stable/c/440fba897c5ae32d7df1f1d609dbb19e2bba7fbb"
            },
            {
               "url": "https://git.kernel.org/stable/c/ce64ba1f6ec3439e4b4d880b4db99673f4507228"
            },
            {
               "url": "https://git.kernel.org/stable/c/d3d17e23d1a0d1f959b4fa55b35f1802d9c584fa"
            }
         ],
         "title": "thunderbolt: Fix NULL pointer dereference in tb_port_update_credits()",
         "x_generator": {
            "engine": "bippy-c9c4e1df01b2"
         }
      }
   },
   "cveMetadata": {
      "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038",
      "cveID": "CVE-2024-27060",
      "requesterUserId": "gregkh@kernel.org",
      "serial": "1",
      "state": "PUBLISHED"
   },
   "dataType": "CVE_RECORD",
   "dataVersion": "5.0"
}