CVE-2024-43900
Vulnerability from cvelistv5
Published
2024-08-26 10:10
Modified
2024-12-19 09:18
Severity ?
EPSS score ?
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
Impacted products
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"id": "CVE-2024-43900",
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"timestamp": "2024-09-10T15:28:53.298476Z",
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"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/media/tuners/xc2028.c"
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"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"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"
}
]
}
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"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": {
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}
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"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"
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"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2024-43900\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-26T11:15:04.613\",\"lastModified\":\"2024-08-27T14:38:32.967\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: medio: xc2028: evitar el use-after-free en load_firmware_cb() syzkaller inform\u00f3 el use-after-free en load_firmware_cb() [1]. La raz\u00f3n es que el m\u00f3dulo asign\u00f3 un sintonizador de estructuras en tuner_probe(), y luego la inicializaci\u00f3n del m\u00f3dulo fall\u00f3, se liber\u00f3 el sintonizador de estructuras. Un trabajador que cre\u00f3 durante la inicializaci\u00f3n del m\u00f3dulo accede a este sintonizador de estructuras m\u00e1s tarde, lo que provoc\u00f3 un use-after-free. El proceso es el siguiente: task-6504 trabajador_thread tuner_probe \u0026lt;= alloc dvb_frontend [2]... request_firmware_nowait \u0026lt;= crear un trabajador... tuner_remove \u0026lt;= free dvb_frontend... request_firmware_work_func \u0026lt;= el firmware est\u00e1 listo load_firmware_cb \u0026lt;= pero ahora el dvb_frontend ha sido liberado. Para solucionar el problema, verifique el dvd_frontend en load_firmware_cb(), si es nulo, informe una advertencia y simplemente regrese. [1]: =============================================== ==================== ERROR: KASAN: use-after-free en load_firmware_cb+0x1310/0x17a0 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff8000d7ca2308 por tarea kworker/2:3/ 6504 Rastreo de llamadas: load_firmware_cb+0x1310/0x17a0 request_firmware_work_func+0x128/0x220 Process_one_work+0x770/0x1824 Workers_thread+0x488/0xea0 kthread+0x300/0x430 ret_from_fork+0x10/0x20 Asignado por tarea 650 4: kzalloc tuner_probe+0xb0/0x1430 i2c_device_probe+0x92c/0xaf0 very_probe+0x678/0xcd0 driver_probe_device+0x280/0x370 __device_attach_driver+0x220/0x330 bus_for_each_drv+0x134/0x1c0 __device_attach+0x1f4/0x410 dispositivo_initial_probe+0x20/0x30 bus_probe_device+0x 184/0x200 dispositivo_add+0x924/0x12c0 registro_dispositivo+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 Liberado por la tarea 6504: kfree+0x238/0x4e4 tuner_remove+0x144/0x1c0 vice_remove+0xc8/0x290 __device_release_driver+0x314/0x5fc dispositivo_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 La direcci\u00f3n con errores pertenece al objeto en ffff8000d7ca200 0 que pertenece al cach\u00e9 kmalloc-2k de tama\u00f1o 2048 La direcci\u00f3n del error se encuentra 776 bytes dentro de la regi\u00f3n de 2048 bytes [ffff8000d7ca2000, ffff8000d7ca2800) La direcci\u00f3n con errores pertenece a la p\u00e1gina: p\u00e1gina:ffff7fe00035f280 recuento:1 mapcount:0 mapeo:ffff8000c001f000 \u00edndice:0x0 banderas: 0x7ff800000000100(slab) : 07ff800000000100 ffff7fe00049d880 0000000300000003 ffff8000c001f000 crudo: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 p\u00e1gina volcada porque: kasan: mal acceso detectado Estado de la memoria alrededor de la direcci\u00f3n del error: ffff8000d7ca2200: fb fb fb fb fb fb fb fb fb fb fb fb f b fb fb fb ffff8000d7ca2280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb \u0026gt;ffff8000d7ca2300: 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 ffff8000d7ca2400: b fb fb fb fb fb fb fb fb fb fb fb fb fb fb ======================================== ============================ [2] En realidad, est\u00e1 asignado para el sintonizador de estructuras y dvb_frontend est\u00e1 dentro.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"6.1.105\",\"matchCriteriaId\":\"ECB889E5-9368-4201-9049-7289757A0B8D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.46\",\"matchCriteriaId\":\"FA11941E-81FB-484C-B583-881EEB488340\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.5\",\"matchCriteriaId\":\"D074AE50-4A5E-499C-A2FD-75FD60DEA560\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/208deb6d8c3cb8c3acb1f41eb31cf68ea08726d5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/68594cec291ff9523b9feb3f43fd853dcddd1f60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/850304152d367f104d21c77cfbcc05806504218b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ef517bdfc01818419f7bd426969a0c86b14f3e0e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
}
}
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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.