github - ghsa-8j3f-9fhh-xf4c

ghsa-8j3f-9fhh-xf4c

Vulnerability from github

Published

2024-08-26 12:31

Modified

2024-08-27 15:32

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

In the Linux kernel, the following vulnerability has been resolved:

media: xc2028: avoid use-after-free in load_firmware_cb()

syzkaller reported use-after-free in load_firmware_cb() 1. The reason is because the module allocated a struct tuner in tuner_probe(), and then the module initialization failed, the struct tuner was released. A worker which created during module initialization accesses this struct tuner later, it caused use-after-free.

The process is as follows:

task-6504 worker_thread tuner_probe <= alloc dvb_frontend [2] ... request_firmware_nowait <= create a worker ... tuner_remove <= free dvb_frontend ... request_firmware_work_func <= the firmware is ready load_firmware_cb <= but now the dvb_frontend has been freed

To fix the issue, check the dvd_frontend in load_firmware_cb(), if it is null, report a warning and just return.

 BUG: KASAN: use-after-free in load_firmware_cb+0x1310/0x17a0
 Read of size 8 at addr ffff8000d7ca2308 by task kworker/2:3/6504

 Call trace:
  load_firmware_cb+0x1310/0x17a0
  request_firmware_work_func+0x128/0x220
  process_one_work+0x770/0x1824
  worker_thread+0x488/0xea0
  kthread+0x300/0x430
  ret_from_fork+0x10/0x20

 Allocated by task 6504:
  kzalloc
  tuner_probe+0xb0/0x1430
  i2c_device_probe+0x92c/0xaf0
  really_probe+0x678/0xcd0
  driver_probe_device+0x280/0x370
  __device_attach_driver+0x220/0x330
  bus_for_each_drv+0x134/0x1c0
  __device_attach+0x1f4/0x410
  device_initial_probe+0x20/0x30
  bus_probe_device+0x184/0x200
  device_add+0x924/0x12c0
  device_register+0x24/0x30
  i2c_new_device+0x4e0/0xc44
  v4l2_i2c_new_subdev_board+0xbc/0x290
  v4l2_i2c_new_subdev+0xc8/0x104
  em28xx_v4l2_init+0x1dd0/0x3770

 Freed by task 6504:
  kfree+0x238/0x4e4
  tuner_remove+0x144/0x1c0
  i2c_device_remove+0xc8/0x290
  __device_release_driver+0x314/0x5fc
  device_release_driver+0x30/0x44
  bus_remove_device+0x244/0x490
  device_del+0x350/0x900
  device_unregister+0x28/0xd0
  i2c_unregister_device+0x174/0x1d0
  v4l2_device_unregister+0x224/0x380
  em28xx_v4l2_init+0x1d90/0x3770

 The buggy address belongs to the object at ffff8000d7ca2000
  which belongs to the cache kmalloc-2k of size 2048
 The buggy address is located 776 bytes inside of
  2048-byte region [ffff8000d7ca2000, ffff8000d7ca2800)
 The buggy address belongs to the page:
 page:ffff7fe00035f280 count:1 mapcount:0 mapping:ffff8000c001f000 index:0x0
 flags: 0x7ff800000000100(slab)
 raw: 07ff800000000100 ffff7fe00049d880 0000000300000003 ffff8000c001f000
 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
 page dumped because: kasan: bad access detected

 Memory state around the buggy address:
  ffff8000d7ca2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
  ffff8000d7ca2280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 >ffff8000d7ca2300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                       ^
  ffff8000d7ca2380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
  ffff8000d7ca2400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ==================================================================

[2] Actually, it is allocated for struct tuner, and dvb_frontend is inside.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-43900"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-26T11:15:04Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: xc2028: avoid use-after-free in load_firmware_cb()\n\nsyzkaller reported use-after-free in load_firmware_cb() [1].\nThe reason is because the module allocated a struct tuner in tuner_probe(),\nand then the module initialization failed, the struct tuner was released.\nA worker which created during module initialization accesses this struct\ntuner later, it caused use-after-free.\n\nThe process is as follows:\n\ntask-6504           worker_thread\ntuner_probe                             \u003c= alloc dvb_frontend [2]\n...\nrequest_firmware_nowait                 \u003c= create a worker\n...\ntuner_remove                            \u003c= free dvb_frontend\n...\n                    request_firmware_work_func  \u003c= the firmware is ready\n                    load_firmware_cb    \u003c= but now the dvb_frontend has been freed\n\nTo fix the issue, check the dvd_frontend in load_firmware_cb(), if it is\nnull, report a warning and just return.\n\n[1]:\n    ==================================================================\n     BUG: KASAN: use-after-free in load_firmware_cb+0x1310/0x17a0\n     Read of size 8 at addr ffff8000d7ca2308 by task kworker/2:3/6504\n\n     Call trace:\n      load_firmware_cb+0x1310/0x17a0\n      request_firmware_work_func+0x128/0x220\n      process_one_work+0x770/0x1824\n      worker_thread+0x488/0xea0\n      kthread+0x300/0x430\n      ret_from_fork+0x10/0x20\n\n     Allocated by task 6504:\n      kzalloc\n      tuner_probe+0xb0/0x1430\n      i2c_device_probe+0x92c/0xaf0\n      really_probe+0x678/0xcd0\n      driver_probe_device+0x280/0x370\n      __device_attach_driver+0x220/0x330\n      bus_for_each_drv+0x134/0x1c0\n      __device_attach+0x1f4/0x410\n      device_initial_probe+0x20/0x30\n      bus_probe_device+0x184/0x200\n      device_add+0x924/0x12c0\n      device_register+0x24/0x30\n      i2c_new_device+0x4e0/0xc44\n      v4l2_i2c_new_subdev_board+0xbc/0x290\n      v4l2_i2c_new_subdev+0xc8/0x104\n      em28xx_v4l2_init+0x1dd0/0x3770\n\n     Freed by task 6504:\n      kfree+0x238/0x4e4\n      tuner_remove+0x144/0x1c0\n      i2c_device_remove+0xc8/0x290\n      __device_release_driver+0x314/0x5fc\n      device_release_driver+0x30/0x44\n      bus_remove_device+0x244/0x490\n      device_del+0x350/0x900\n      device_unregister+0x28/0xd0\n      i2c_unregister_device+0x174/0x1d0\n      v4l2_device_unregister+0x224/0x380\n      em28xx_v4l2_init+0x1d90/0x3770\n\n     The buggy address belongs to the object at ffff8000d7ca2000\n      which belongs to the cache kmalloc-2k of size 2048\n     The buggy address is located 776 bytes inside of\n      2048-byte region [ffff8000d7ca2000, ffff8000d7ca2800)\n     The buggy address belongs to the page:\n     page:ffff7fe00035f280 count:1 mapcount:0 mapping:ffff8000c001f000 index:0x0\n     flags: 0x7ff800000000100(slab)\n     raw: 07ff800000000100 ffff7fe00049d880 0000000300000003 ffff8000c001f000\n     raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000\n     page dumped because: kasan: bad access detected\n\n     Memory state around the buggy address:\n      ffff8000d7ca2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n      ffff8000d7ca2280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n     \u003effff8000d7ca2300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n                           ^\n      ffff8000d7ca2380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n      ffff8000d7ca2400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n     ==================================================================\n\n[2]\n    Actually, it is allocated for struct tuner, and dvb_frontend is inside.",
  "id": "GHSA-8j3f-9fhh-xf4c",
  "modified": "2024-08-27T15:32:44Z",
  "published": "2024-08-26T12:31:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-43900"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/208deb6d8c3cb8c3acb1f41eb31cf68ea08726d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/68594cec291ff9523b9feb3f43fd853dcddd1f60"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/850304152d367f104d21c77cfbcc05806504218b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef517bdfc01818419f7bd426969a0c86b14f3e0e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

cve-2024-43900

Vulnerability from cvelistv5

Published

2024-08-26 10:10

Modified

2024-12-19 09:18

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: media: xc2028: avoid use-after-free in load_firmware_cb() syzkaller reported use-after-free in load_firmware_cb() [1]. The reason is because the module allocated a struct tuner in tuner_probe(), and then the module initialization failed, the struct tuner was released. A worker which created during module initialization accesses this struct tuner later, it caused use-after-free. The process is as follows: task-6504 worker_thread tuner_probe <= alloc dvb_frontend [2] ... request_firmware_nowait <= create a worker ... tuner_remove <= free dvb_frontend ... request_firmware_work_func <= the firmware is ready load_firmware_cb <= but now the dvb_frontend has been freed To fix the issue, check the dvd_frontend in load_firmware_cb(), if it is null, report a warning and just return. [1]: ================================================================== BUG: KASAN: use-after-free in load_firmware_cb+0x1310/0x17a0 Read of size 8 at addr ffff8000d7ca2308 by task kworker/2:3/6504 Call trace: load_firmware_cb+0x1310/0x17a0 request_firmware_work_func+0x128/0x220 process_one_work+0x770/0x1824 worker_thread+0x488/0xea0 kthread+0x300/0x430 ret_from_fork+0x10/0x20 Allocated by task 6504: kzalloc tuner_probe+0xb0/0x1430 i2c_device_probe+0x92c/0xaf0 really_probe+0x678/0xcd0 driver_probe_device+0x280/0x370 __device_attach_driver+0x220/0x330 bus_for_each_drv+0x134/0x1c0 __device_attach+0x1f4/0x410 device_initial_probe+0x20/0x30 bus_probe_device+0x184/0x200 device_add+0x924/0x12c0 device_register+0x24/0x30 i2c_new_device+0x4e0/0xc44 v4l2_i2c_new_subdev_board+0xbc/0x290 v4l2_i2c_new_subdev+0xc8/0x104 em28xx_v4l2_init+0x1dd0/0x3770 Freed by task 6504: kfree+0x238/0x4e4 tuner_remove+0x144/0x1c0 i2c_device_remove+0xc8/0x290 __device_release_driver+0x314/0x5fc device_release_driver+0x30/0x44 bus_remove_device+0x244/0x490 device_del+0x350/0x900 device_unregister+0x28/0xd0 i2c_unregister_device+0x174/0x1d0 v4l2_device_unregister+0x224/0x380 em28xx_v4l2_init+0x1d90/0x3770 The buggy address belongs to the object at ffff8000d7ca2000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 776 bytes inside of 2048-byte region [ffff8000d7ca2000, ffff8000d7ca2800) The buggy address belongs to the page: page:ffff7fe00035f280 count:1 mapcount:0 mapping:ffff8000c001f000 index:0x0 flags: 0x7ff800000000100(slab) raw: 07ff800000000100 ffff7fe00049d880 0000000300000003 ffff8000c001f000 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8000d7ca2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8000d7ca2280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8000d7ca2300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8000d7ca2380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8000d7ca2400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== [2] Actually, it is allocated for struct tuner, and dvb_frontend is inside.

References

▼	URL	Tags
	https://git.kernel.org/stable/c/ef517bdfc01818419f7bd426969a0c86b14f3e0e
	https://git.kernel.org/stable/c/850304152d367f104d21c77cfbcc05806504218b
	https://git.kernel.org/stable/c/208deb6d8c3cb8c3acb1f41eb31cf68ea08726d5
	https://git.kernel.org/stable/c/68594cec291ff9523b9feb3f43fd853dcddd1f60

Impacted products

Vendor

Product

Version

▼

Linux

Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Linux

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-43900",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:28:53.298476Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-12T17:32:57.642Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/tuners/xc2028.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "ef517bdfc01818419f7bd426969a0c86b14f3e0e",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "850304152d367f104d21c77cfbcc05806504218b",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "208deb6d8c3cb8c3acb1f41eb31cf68ea08726d5",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "68594cec291ff9523b9feb3f43fd853dcddd1f60",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/tuners/xc2028.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.11",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: xc2028: avoid use-after-free in load_firmware_cb()\n\nsyzkaller reported use-after-free in load_firmware_cb() [1].\nThe reason is because the module allocated a struct tuner in tuner_probe(),\nand then the module initialization failed, the struct tuner was released.\nA worker which created during module initialization accesses this struct\ntuner later, it caused use-after-free.\n\nThe process is as follows:\n\ntask-6504           worker_thread\ntuner_probe                             \u003c= alloc dvb_frontend [2]\n...\nrequest_firmware_nowait                 \u003c= create a worker\n...\ntuner_remove                            \u003c= free dvb_frontend\n...\n                    request_firmware_work_func  \u003c= the firmware is ready\n                    load_firmware_cb    \u003c= but now the dvb_frontend has been freed\n\nTo fix the issue, check the dvd_frontend in load_firmware_cb(), if it is\nnull, report a warning and just return.\n\n[1]:\n    ==================================================================\n     BUG: KASAN: use-after-free in load_firmware_cb+0x1310/0x17a0\n     Read of size 8 at addr ffff8000d7ca2308 by task kworker/2:3/6504\n\n     Call trace:\n      load_firmware_cb+0x1310/0x17a0\n      request_firmware_work_func+0x128/0x220\n      process_one_work+0x770/0x1824\n      worker_thread+0x488/0xea0\n      kthread+0x300/0x430\n      ret_from_fork+0x10/0x20\n\n     Allocated by task 6504:\n      kzalloc\n      tuner_probe+0xb0/0x1430\n      i2c_device_probe+0x92c/0xaf0\n      really_probe+0x678/0xcd0\n      driver_probe_device+0x280/0x370\n      __device_attach_driver+0x220/0x330\n      bus_for_each_drv+0x134/0x1c0\n      __device_attach+0x1f4/0x410\n      device_initial_probe+0x20/0x30\n      bus_probe_device+0x184/0x200\n      device_add+0x924/0x12c0\n      device_register+0x24/0x30\n      i2c_new_device+0x4e0/0xc44\n      v4l2_i2c_new_subdev_board+0xbc/0x290\n      v4l2_i2c_new_subdev+0xc8/0x104\n      em28xx_v4l2_init+0x1dd0/0x3770\n\n     Freed by task 6504:\n      kfree+0x238/0x4e4\n      tuner_remove+0x144/0x1c0\n      i2c_device_remove+0xc8/0x290\n      __device_release_driver+0x314/0x5fc\n      device_release_driver+0x30/0x44\n      bus_remove_device+0x244/0x490\n      device_del+0x350/0x900\n      device_unregister+0x28/0xd0\n      i2c_unregister_device+0x174/0x1d0\n      v4l2_device_unregister+0x224/0x380\n      em28xx_v4l2_init+0x1d90/0x3770\n\n     The buggy address belongs to the object at ffff8000d7ca2000\n      which belongs to the cache kmalloc-2k of size 2048\n     The buggy address is located 776 bytes inside of\n      2048-byte region [ffff8000d7ca2000, ffff8000d7ca2800)\n     The buggy address belongs to the page:\n     page:ffff7fe00035f280 count:1 mapcount:0 mapping:ffff8000c001f000 index:0x0\n     flags: 0x7ff800000000100(slab)\n     raw: 07ff800000000100 ffff7fe00049d880 0000000300000003 ffff8000c001f000\n     raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000\n     page dumped because: kasan: bad access detected\n\n     Memory state around the buggy address:\n      ffff8000d7ca2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n      ffff8000d7ca2280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n     \u003effff8000d7ca2300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n                           ^\n      ffff8000d7ca2380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n      ffff8000d7ca2400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb\n     ==================================================================\n\n[2]\n    Actually, it is allocated for struct tuner, and dvb_frontend is inside."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-19T09:18:05.179Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ef517bdfc01818419f7bd426969a0c86b14f3e0e"
        },
        {
          "url": "https://git.kernel.org/stable/c/850304152d367f104d21c77cfbcc05806504218b"
        },
        {
          "url": "https://git.kernel.org/stable/c/208deb6d8c3cb8c3acb1f41eb31cf68ea08726d5"
        },
        {
          "url": "https://git.kernel.org/stable/c/68594cec291ff9523b9feb3f43fd853dcddd1f60"
        }
      ],
      "title": "media: xc2028: avoid use-after-free in load_firmware_cb()",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-43900",
    "datePublished": "2024-08-26T10:10:58.767Z",
    "dateReserved": "2024-08-17T09:11:59.291Z",
    "dateUpdated": "2024-12-19T09:18:05.179Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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