{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-47097"
      ],
      "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: elantech - fix stack out of bound access in elantech_change_report_id()\n\nThe array param[] in elantech_change_report_id() must be at least 3\nbytes, because elantech_read_reg_params() is calling ps2_command() with\nPSMOUSE_CMD_GETINFO, that is going to access 3 bytes from param[], but\nit\u0027s defined in the stack as an array of 2 bytes, therefore we have a\npotential stack out-of-bounds access here, also confirmed by KASAN:\n\n[    6.512374] BUG: KASAN: stack-out-of-bounds in __ps2_command+0x372/0x7e0\n[    6.512397] Read of size 1 at addr ffff8881024d77c2 by task kworker/2:1/118\n\n[    6.512416] CPU: 2 PID: 118 Comm: kworker/2:1 Not tainted 5.13.0-22-generic #22+arighi20211110\n[    6.512428] Hardware name: LENOVO 20T8000QGE/20T8000QGE, BIOS R1AET32W (1.08 ) 08/14/2020\n[    6.512436] Workqueue: events_long serio_handle_event\n[    6.512453] Call Trace:\n[    6.512462]  show_stack+0x52/0x58\n[    6.512474]  dump_stack+0xa1/0xd3\n[    6.512487]  print_address_description.constprop.0+0x1d/0x140\n[    6.512502]  ? __ps2_command+0x372/0x7e0\n[    6.512516]  __kasan_report.cold+0x7d/0x112\n[    6.512527]  ? _raw_write_lock_irq+0x20/0xd0\n[    6.512539]  ? __ps2_command+0x372/0x7e0\n[    6.512552]  kasan_report+0x3c/0x50\n[    6.512564]  __asan_load1+0x6a/0x70\n[    6.512575]  __ps2_command+0x372/0x7e0\n[    6.512589]  ? ps2_drain+0x240/0x240\n[    6.512601]  ? dev_printk_emit+0xa2/0xd3\n[    6.512612]  ? dev_vprintk_emit+0xc5/0xc5\n[    6.512621]  ? __kasan_check_write+0x14/0x20\n[    6.512634]  ? mutex_lock+0x8f/0xe0\n[    6.512643]  ? __mutex_lock_slowpath+0x20/0x20\n[    6.512655]  ps2_command+0x52/0x90\n[    6.512670]  elantech_ps2_command+0x4f/0xc0 [psmouse]\n[    6.512734]  elantech_change_report_id+0x1e6/0x256 [psmouse]\n[    6.512799]  ? elantech_report_trackpoint.constprop.0.cold+0xd/0xd [psmouse]\n[    6.512863]  ? ps2_command+0x7f/0x90\n[    6.512877]  elantech_query_info.cold+0x6bd/0x9ed [psmouse]\n[    6.512943]  ? elantech_setup_ps2+0x460/0x460 [psmouse]\n[    6.513005]  ? psmouse_reset+0x69/0xb0 [psmouse]\n[    6.513064]  ? psmouse_attr_set_helper+0x2a0/0x2a0 [psmouse]\n[    6.513122]  ? phys_pmd_init+0x30e/0x521\n[    6.513137]  elantech_init+0x8a/0x200 [psmouse]\n[    6.513200]  ? elantech_init_ps2+0xf0/0xf0 [psmouse]\n[    6.513249]  ? elantech_query_info+0x440/0x440 [psmouse]\n[    6.513296]  ? synaptics_send_cmd+0x60/0x60 [psmouse]\n[    6.513342]  ? elantech_query_info+0x440/0x440 [psmouse]\n[    6.513388]  ? psmouse_try_protocol+0x11e/0x170 [psmouse]\n[    6.513432]  psmouse_extensions+0x65d/0x6e0 [psmouse]\n[    6.513476]  ? psmouse_try_protocol+0x170/0x170 [psmouse]\n[    6.513519]  ? mutex_unlock+0x22/0x40\n[    6.513526]  ? ps2_command+0x7f/0x90\n[    6.513536]  ? psmouse_probe+0xa3/0xf0 [psmouse]\n[    6.513580]  psmouse_switch_protocol+0x27d/0x2e0 [psmouse]\n[    6.513624]  psmouse_connect+0x272/0x530 [psmouse]\n[    6.513669]  serio_driver_probe+0x55/0x70\n[    6.513679]  really_probe+0x190/0x720\n[    6.513689]  driver_probe_device+0x160/0x1f0\n[    6.513697]  device_driver_attach+0x119/0x130\n[    6.513705]  ? device_driver_attach+0x130/0x130\n[    6.513713]  __driver_attach+0xe7/0x1a0\n[    6.513720]  ? device_driver_attach+0x130/0x130\n[    6.513728]  bus_for_each_dev+0xfb/0x150\n[    6.513738]  ? subsys_dev_iter_exit+0x10/0x10\n[    6.513748]  ? _raw_write_unlock_bh+0x30/0x30\n[    6.513757]  driver_attach+0x2d/0x40\n[    6.513764]  serio_handle_event+0x199/0x3d0\n[    6.513775]  process_one_work+0x471/0x740\n[    6.513785]  worker_thread+0x2d2/0x790\n[    6.513794]  ? process_one_work+0x740/0x740\n[    6.513802]  kthread+0x1b4/0x1e0\n[    6.513809]  ? set_kthread_struct+0x80/0x80\n[    6.513816]  ret_from_fork+0x22/0x30\n\n[    6.513832] The buggy address belongs to the page:\n[    6.513838] page:00000000bc35e189 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1024d7\n[    6.513847] flags: 0x17ffffc0000000(node=0|zone=2|lastcpupid=0x1fffff)\n[    6.513860] raw: 0\n---truncated---",
      "id": "GSD-2021-47097",
      "modified": "2024-03-01T06:04:48.306109Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@kernel.org",
        "ID": "CVE-2021-47097",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Linux",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "9e4815cf1785",
                          "version_value": "a7f95328c6f0"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "dde807b4a442",
                          "version_value": "676c572439e5"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "e4c9062717fe",
                          "version_value": "dfd5b60b5342"
                        },
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected",
                            "versions": [
                              {
                                "status": "affected",
                                "version": "5.11"
                              },
                              {
                                "lessThan": "5.11",
                                "status": "unaffected",
                                "version": "0",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "5.4.*",
                                "status": "unaffected",
                                "version": "5.4.169",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "5.10.*",
                                "status": "unaffected",
                                "version": "5.10.89",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "5.15.*",
                                "status": "unaffected",
                                "version": "5.15.12",
                                "versionType": "custom"
                              },
                              {
                                "lessThanOrEqual": "*",
                                "status": "unaffected",
                                "version": "5.16",
                                "versionType": "original_commit_for_fix"
                              }
                            ]
                          }
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Linux"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: elantech - fix stack out of bound access in elantech_change_report_id()\n\nThe array param[] in elantech_change_report_id() must be at least 3\nbytes, because elantech_read_reg_params() is calling ps2_command() with\nPSMOUSE_CMD_GETINFO, that is going to access 3 bytes from param[], but\nit\u0027s defined in the stack as an array of 2 bytes, therefore we have a\npotential stack out-of-bounds access here, also confirmed by KASAN:\n\n[    6.512374] BUG: KASAN: stack-out-of-bounds in __ps2_command+0x372/0x7e0\n[    6.512397] Read of size 1 at addr ffff8881024d77c2 by task kworker/2:1/118\n\n[    6.512416] CPU: 2 PID: 118 Comm: kworker/2:1 Not tainted 5.13.0-22-generic #22+arighi20211110\n[    6.512428] Hardware name: LENOVO 20T8000QGE/20T8000QGE, BIOS R1AET32W (1.08 ) 08/14/2020\n[    6.512436] Workqueue: events_long serio_handle_event\n[    6.512453] Call Trace:\n[    6.512462]  show_stack+0x52/0x58\n[    6.512474]  dump_stack+0xa1/0xd3\n[    6.512487]  print_address_description.constprop.0+0x1d/0x140\n[    6.512502]  ? __ps2_command+0x372/0x7e0\n[    6.512516]  __kasan_report.cold+0x7d/0x112\n[    6.512527]  ? _raw_write_lock_irq+0x20/0xd0\n[    6.512539]  ? __ps2_command+0x372/0x7e0\n[    6.512552]  kasan_report+0x3c/0x50\n[    6.512564]  __asan_load1+0x6a/0x70\n[    6.512575]  __ps2_command+0x372/0x7e0\n[    6.512589]  ? ps2_drain+0x240/0x240\n[    6.512601]  ? dev_printk_emit+0xa2/0xd3\n[    6.512612]  ? dev_vprintk_emit+0xc5/0xc5\n[    6.512621]  ? __kasan_check_write+0x14/0x20\n[    6.512634]  ? mutex_lock+0x8f/0xe0\n[    6.512643]  ? __mutex_lock_slowpath+0x20/0x20\n[    6.512655]  ps2_command+0x52/0x90\n[    6.512670]  elantech_ps2_command+0x4f/0xc0 [psmouse]\n[    6.512734]  elantech_change_report_id+0x1e6/0x256 [psmouse]\n[    6.512799]  ? elantech_report_trackpoint.constprop.0.cold+0xd/0xd [psmouse]\n[    6.512863]  ? ps2_command+0x7f/0x90\n[    6.512877]  elantech_query_info.cold+0x6bd/0x9ed [psmouse]\n[    6.512943]  ? elantech_setup_ps2+0x460/0x460 [psmouse]\n[    6.513005]  ? psmouse_reset+0x69/0xb0 [psmouse]\n[    6.513064]  ? psmouse_attr_set_helper+0x2a0/0x2a0 [psmouse]\n[    6.513122]  ? phys_pmd_init+0x30e/0x521\n[    6.513137]  elantech_init+0x8a/0x200 [psmouse]\n[    6.513200]  ? elantech_init_ps2+0xf0/0xf0 [psmouse]\n[    6.513249]  ? elantech_query_info+0x440/0x440 [psmouse]\n[    6.513296]  ? synaptics_send_cmd+0x60/0x60 [psmouse]\n[    6.513342]  ? elantech_query_info+0x440/0x440 [psmouse]\n[    6.513388]  ? psmouse_try_protocol+0x11e/0x170 [psmouse]\n[    6.513432]  psmouse_extensions+0x65d/0x6e0 [psmouse]\n[    6.513476]  ? psmouse_try_protocol+0x170/0x170 [psmouse]\n[    6.513519]  ? mutex_unlock+0x22/0x40\n[    6.513526]  ? ps2_command+0x7f/0x90\n[    6.513536]  ? psmouse_probe+0xa3/0xf0 [psmouse]\n[    6.513580]  psmouse_switch_protocol+0x27d/0x2e0 [psmouse]\n[    6.513624]  psmouse_connect+0x272/0x530 [psmouse]\n[    6.513669]  serio_driver_probe+0x55/0x70\n[    6.513679]  really_probe+0x190/0x720\n[    6.513689]  driver_probe_device+0x160/0x1f0\n[    6.513697]  device_driver_attach+0x119/0x130\n[    6.513705]  ? device_driver_attach+0x130/0x130\n[    6.513713]  __driver_attach+0xe7/0x1a0\n[    6.513720]  ? device_driver_attach+0x130/0x130\n[    6.513728]  bus_for_each_dev+0xfb/0x150\n[    6.513738]  ? subsys_dev_iter_exit+0x10/0x10\n[    6.513748]  ? _raw_write_unlock_bh+0x30/0x30\n[    6.513757]  driver_attach+0x2d/0x40\n[    6.513764]  serio_handle_event+0x199/0x3d0\n[    6.513775]  process_one_work+0x471/0x740\n[    6.513785]  worker_thread+0x2d2/0x790\n[    6.513794]  ? process_one_work+0x740/0x740\n[    6.513802]  kthread+0x1b4/0x1e0\n[    6.513809]  ? set_kthread_struct+0x80/0x80\n[    6.513816]  ret_from_fork+0x22/0x30\n\n[    6.513832] The buggy address belongs to the page:\n[    6.513838] page:00000000bc35e189 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1024d7\n[    6.513847] flags: 0x17ffffc0000000(node=0|zone=2|lastcpupid=0x1fffff)\n[    6.513860] raw: 0\n---truncated---"
          }
        ]
      },
      "generator": {
        "engine": "bippy-851b3ed3d212"
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://git.kernel.org/stable/c/a7f95328c6f0afffdc4555f16e3bbab8bbf0d9be",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/a7f95328c6f0afffdc4555f16e3bbab8bbf0d9be"
          },
          {
            "name": "https://git.kernel.org/stable/c/676c572439e58b7ee6b7ca3f1e5595382921045c",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/676c572439e58b7ee6b7ca3f1e5595382921045c"
          },
          {
            "name": "https://git.kernel.org/stable/c/dfd5b60b5342b6b505a104e48f08ad9b9bdbbd7b",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/dfd5b60b5342b6b505a104e48f08ad9b9bdbbd7b"
          },
          {
            "name": "https://git.kernel.org/stable/c/1d72d9f960ccf1052a0630a68c3d358791dbdaaa",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/1d72d9f960ccf1052a0630a68c3d358791dbdaaa"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: elantech - fix stack out of bound access in elantech_change_report_id()\n\nThe array param[] in elantech_change_report_id() must be at least 3\nbytes, because elantech_read_reg_params() is calling ps2_command() with\nPSMOUSE_CMD_GETINFO, that is going to access 3 bytes from param[], but\nit\u0027s defined in the stack as an array of 2 bytes, therefore we have a\npotential stack out-of-bounds access here, also confirmed by KASAN:\n\n[    6.512374] BUG: KASAN: stack-out-of-bounds in __ps2_command+0x372/0x7e0\n[    6.512397] Read of size 1 at addr ffff8881024d77c2 by task kworker/2:1/118\n\n[    6.512416] CPU: 2 PID: 118 Comm: kworker/2:1 Not tainted 5.13.0-22-generic #22+arighi20211110\n[    6.512428] Hardware name: LENOVO 20T8000QGE/20T8000QGE, BIOS R1AET32W (1.08 ) 08/14/2020\n[    6.512436] Workqueue: events_long serio_handle_event\n[    6.512453] Call Trace:\n[    6.512462]  show_stack+0x52/0x58\n[    6.512474]  dump_stack+0xa1/0xd3\n[    6.512487]  print_address_description.constprop.0+0x1d/0x140\n[    6.512502]  ? __ps2_command+0x372/0x7e0\n[    6.512516]  __kasan_report.cold+0x7d/0x112\n[    6.512527]  ? _raw_write_lock_irq+0x20/0xd0\n[    6.512539]  ? __ps2_command+0x372/0x7e0\n[    6.512552]  kasan_report+0x3c/0x50\n[    6.512564]  __asan_load1+0x6a/0x70\n[    6.512575]  __ps2_command+0x372/0x7e0\n[    6.512589]  ? ps2_drain+0x240/0x240\n[    6.512601]  ? dev_printk_emit+0xa2/0xd3\n[    6.512612]  ? dev_vprintk_emit+0xc5/0xc5\n[    6.512621]  ? __kasan_check_write+0x14/0x20\n[    6.512634]  ? mutex_lock+0x8f/0xe0\n[    6.512643]  ? __mutex_lock_slowpath+0x20/0x20\n[    6.512655]  ps2_command+0x52/0x90\n[    6.512670]  elantech_ps2_command+0x4f/0xc0 [psmouse]\n[    6.512734]  elantech_change_report_id+0x1e6/0x256 [psmouse]\n[    6.512799]  ? elantech_report_trackpoint.constprop.0.cold+0xd/0xd [psmouse]\n[    6.512863]  ? ps2_command+0x7f/0x90\n[    6.512877]  elantech_query_info.cold+0x6bd/0x9ed [psmouse]\n[    6.512943]  ? elantech_setup_ps2+0x460/0x460 [psmouse]\n[    6.513005]  ? psmouse_reset+0x69/0xb0 [psmouse]\n[    6.513064]  ? psmouse_attr_set_helper+0x2a0/0x2a0 [psmouse]\n[    6.513122]  ? phys_pmd_init+0x30e/0x521\n[    6.513137]  elantech_init+0x8a/0x200 [psmouse]\n[    6.513200]  ? elantech_init_ps2+0xf0/0xf0 [psmouse]\n[    6.513249]  ? elantech_query_info+0x440/0x440 [psmouse]\n[    6.513296]  ? synaptics_send_cmd+0x60/0x60 [psmouse]\n[    6.513342]  ? elantech_query_info+0x440/0x440 [psmouse]\n[    6.513388]  ? psmouse_try_protocol+0x11e/0x170 [psmouse]\n[    6.513432]  psmouse_extensions+0x65d/0x6e0 [psmouse]\n[    6.513476]  ? psmouse_try_protocol+0x170/0x170 [psmouse]\n[    6.513519]  ? mutex_unlock+0x22/0x40\n[    6.513526]  ? ps2_command+0x7f/0x90\n[    6.513536]  ? psmouse_probe+0xa3/0xf0 [psmouse]\n[    6.513580]  psmouse_switch_protocol+0x27d/0x2e0 [psmouse]\n[    6.513624]  psmouse_connect+0x272/0x530 [psmouse]\n[    6.513669]  serio_driver_probe+0x55/0x70\n[    6.513679]  really_probe+0x190/0x720\n[    6.513689]  driver_probe_device+0x160/0x1f0\n[    6.513697]  device_driver_attach+0x119/0x130\n[    6.513705]  ? device_driver_attach+0x130/0x130\n[    6.513713]  __driver_attach+0xe7/0x1a0\n[    6.513720]  ? device_driver_attach+0x130/0x130\n[    6.513728]  bus_for_each_dev+0xfb/0x150\n[    6.513738]  ? subsys_dev_iter_exit+0x10/0x10\n[    6.513748]  ? _raw_write_unlock_bh+0x30/0x30\n[    6.513757]  driver_attach+0x2d/0x40\n[    6.513764]  serio_handle_event+0x199/0x3d0\n[    6.513775]  process_one_work+0x471/0x740\n[    6.513785]  worker_thread+0x2d2/0x790\n[    6.513794]  ? process_one_work+0x740/0x740\n[    6.513802]  kthread+0x1b4/0x1e0\n[    6.513809]  ? set_kthread_struct+0x80/0x80\n[    6.513816]  ret_from_fork+0x22/0x30\n\n[    6.513832] The buggy address belongs to the page:\n[    6.513838] page:00000000bc35e189 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1024d7\n[    6.513847] flags: 0x17ffffc0000000(node=0|zone=2|lastcpupid=0x1fffff)\n[    6.513860] raw: 0\n---truncated---"
          }
        ],
        "id": "CVE-2021-47097",
        "lastModified": "2024-03-05T13:41:01.900",
        "metrics": {},
        "published": "2024-03-04T18:15:08.017",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/1d72d9f960ccf1052a0630a68c3d358791dbdaaa"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/676c572439e58b7ee6b7ca3f1e5595382921045c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/a7f95328c6f0afffdc4555f16e3bbab8bbf0d9be"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/dfd5b60b5342b6b505a104e48f08ad9b9bdbbd7b"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis"
      }
    }
  }
}