CVE-2022-50626
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
media: dvb-usb: fix memory leak in dvb_usb_adapter_init()
Syzbot reports a memory leak in "dvb_usb_adapter_init()". The leak is due to not accounting for and freeing current iteration's adapter->priv in case of an error. Currently if an error occurs, it will exit before incrementing "num_adapters_initalized", which is used as a reference counter to free all adap->priv in "dvb_usb_adapter_exit()". There are multiple error paths that can exit from before incrementing the counter. Including the error handling paths for "dvb_usb_adapter_stream_init()", "dvb_usb_adapter_dvb_init()" and "dvb_usb_adapter_frontend_init()" within "dvb_usb_adapter_init()".
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This means that in case of an error in any of these functions the current iteration is not accounted for and the current iteration's adap->priv is not freed.
Fix this by freeing the current iteration's adap->priv in the "stream_init_err:" label in the error path. The rest of the (accounted for) adap->priv objects are freed in dvb_usb_adapter_exit() as expected using the num_adapters_initalized variable.
Syzbot report:
Detalles técnicos trazas, registros y código del informe original
BUG: memory leak
unreferenced object 0xffff8881172f1a00 (size 512):
comm "kworker/0:2", pid 139, jiffies 4294994873 (age 10.960s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff844af012>] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:75 [inline]
[<ffffffff844af012>] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:184 [inline]
[<ffffffff844af012>] dvb_usb_device_init.cold+0x4e5/0x79e drivers/media/usb/dvb-usb/dvb-usb-init.c:308
[<ffffffff830db21d>] dib0700_probe+0x8d/0x1b0 drivers/media/usb/dvb-usb/dib0700_core.c:883
[<ffffffff82d3fdc7>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396
[<ffffffff8274ab37>] call_driver_probe drivers/base/dd.c:542 [inline]
[<ffffffff8274ab37>] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621
[<ffffffff8274ae6c>] really_probe drivers/base/dd.c:583 [inline]
[<ffffffff8274ae6c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752
[<ffffffff8274af6a>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:782
[<ffffffff8274b786>] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:899
[<ffffffff82747c87>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427
[<ffffffff8274b352>] __device_attach+0x122/0x260 drivers/base/dd.c:970
[<ffffffff827498f6>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487
[<ffffffff82745cdb>] device_add+0x5fb/0xdf0 drivers/base/core.c:3405
[<ffffffff82d3d202>] usb_set_configuration+0x8f2/0xb80 drivers/usb/core/message.c:2170
[<ffffffff82d4dbfc>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238
[<ffffffff82d3f49c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293
[<ffffffff8274ab37>] call_driver_probe drivers/base/dd.c:542 [inline]
[<ffffffff8274ab37>] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621
[<ffffffff8274ae6c>] really_probe drivers/base/dd.c:583 [inline]
[<ffffffff8274ae6c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.23%
- Percentil entre todas las CVEs puntuadas: 13
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/17217737c174883dd975885ab4bee4b00f517239
- https://git.kernel.org/stable/c/21b6b0c9f3796e6917e90db403dae9e74025fc40
- https://git.kernel.org/stable/c/733bc9e226da2a7f43b10031b8ebfc26d89ec4bd
- https://git.kernel.org/stable/c/7d7ab25ead969594df05fb09ee46ca931d46c5c8
- https://git.kernel.org/stable/c/93bbf2ed428142aa9a9693721230b28571678bf8
- https://git.kernel.org/stable/c/94d90fb06b94a90c176270d38861bcba34ce377d
- https://git.kernel.org/stable/c/d0af6220bb1eed8225a5511de5a3bd386b94afa4
- https://git.kernel.org/stable/c/e5a49140035591d13ff57a7537c65217e5af0d15
- https://git.kernel.org/stable/c/e5d01eb6dc2f699a395d3e731c58a9b3bb4e269f
JSON original (NVD)
Mostrar
{
"id": "CVE-2022-50626",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"programFiles": [
"drivers/media/usb/dvb-usb/dvb-usb-init.c"
],
"defaultStatus": "unaffected"
},
{
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"vendor": "Linux",
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},
{
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{
"status": "unaffected",
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"lessThanOrEqual": "4.9.*"
},
{
"status": "unaffected",
"version": "4.14.303",
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{
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{
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{
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{
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},
{
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"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/media/usb/dvb-usb/dvb-usb-init.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-08T02:15:48.653",
"references": [
{
"url": "https://git.kernel.org/stable/c/17217737c174883dd975885ab4bee4b00f517239",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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},
{
"url": "https://git.kernel.org/stable/c/d0af6220bb1eed8225a5511de5a3bd386b94afa4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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{
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},
{
"url": "https://git.kernel.org/stable/c/e5d01eb6dc2f699a395d3e731c58a9b3bb4e269f",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-usb: fix memory leak in dvb_usb_adapter_init()\n\nSyzbot reports a memory leak in \"dvb_usb_adapter_init()\".\nThe leak is due to not accounting for and freeing current iteration's\nadapter->priv in case of an error. Currently if an error occurs,\nit will exit before incrementing \"num_adapters_initalized\",\nwhich is used as a reference counter to free all adap->priv\nin \"dvb_usb_adapter_exit()\". There are multiple error paths that\ncan exit from before incrementing the counter. Including the\nerror handling paths for \"dvb_usb_adapter_stream_init()\",\n\"dvb_usb_adapter_dvb_init()\" and \"dvb_usb_adapter_frontend_init()\"\nwithin \"dvb_usb_adapter_init()\".\n\nThis means that in case of an error in any of these functions the\ncurrent iteration is not accounted for and the current iteration's\nadap->priv is not freed.\n\nFix this by freeing the current iteration's adap->priv in the\n\"stream_init_err:\" label in the error path. The rest of the\n(accounted for) adap->priv objects are freed in dvb_usb_adapter_exit()\nas expected using the num_adapters_initalized variable.\n\nSyzbot report:\n\nBUG: memory leak\nunreferenced object 0xffff8881172f1a00 (size 512):\n comm \"kworker/0:2\", pid 139, jiffies 4294994873 (age 10.960s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\nbacktrace:\n [<ffffffff844af012>] dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:75 [inline]\n [<ffffffff844af012>] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:184 [inline]\n [<ffffffff844af012>] dvb_usb_device_init.cold+0x4e5/0x79e drivers/media/usb/dvb-usb/dvb-usb-init.c:308\n [<ffffffff830db21d>] dib0700_probe+0x8d/0x1b0 drivers/media/usb/dvb-usb/dib0700_core.c:883\n [<ffffffff82d3fdc7>] usb_probe_interface+0x177/0x370 drivers/usb/core/driver.c:396\n [<ffffffff8274ab37>] call_driver_probe drivers/base/dd.c:542 [inline]\n [<ffffffff8274ab37>] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621\n [<ffffffff8274ae6c>] really_probe drivers/base/dd.c:583 [inline]\n [<ffffffff8274ae6c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752\n [<ffffffff8274af6a>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:782\n [<ffffffff8274b786>] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:899\n [<ffffffff82747c87>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427\n [<ffffffff8274b352>] __device_attach+0x122/0x260 drivers/base/dd.c:970\n [<ffffffff827498f6>] bus_probe_device+0xc6/0xe0 drivers/base/bus.c:487\n [<ffffffff82745cdb>] device_add+0x5fb/0xdf0 drivers/base/core.c:3405\n [<ffffffff82d3d202>] usb_set_configuration+0x8f2/0xb80 drivers/usb/core/message.c:2170\n [<ffffffff82d4dbfc>] usb_generic_driver_probe+0x8c/0xc0 drivers/usb/core/generic.c:238\n [<ffffffff82d3f49c>] usb_probe_device+0x5c/0x140 drivers/usb/core/driver.c:293\n [<ffffffff8274ab37>] call_driver_probe drivers/base/dd.c:542 [inline]\n [<ffffffff8274ab37>] really_probe.part.0+0xe7/0x310 drivers/base/dd.c:621\n [<ffffffff8274ae6c>] really_probe drivers/base/dd.c:583 [inline]\n [<ffffffff8274ae6c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:752"
}
],
"lastModified": "2026-06-17T05:23:53.550",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}