{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-09T19:10:19.220","vulnerabilities":[{"cve":{"id":"CVE-2022-50214","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-06-18T11:15:52.310","lastModified":"2025-11-19T13:00:06.100","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: Clear the connection field properly\n\ncoresight devices track their connections (output connections) and\nhold a reference to the fwnode. When a device goes away, we walk through\nthe devices on the coresight bus and make sure that the references\nare dropped. This happens both ways:\n a) For all output connections from the device, drop the reference to\n    the target device via coresight_release_platform_data()\n\nb) Iterate over all the devices on the coresight bus and drop the\n   reference to fwnode if *this* device is the target of the output\n   connection, via coresight_remove_conns()->coresight_remove_match().\n\nHowever, the coresight_remove_match() doesn't clear the fwnode field,\nafter dropping the reference, this causes use-after-free and\nadditional refcount drops on the fwnode.\n\ne.g., if we have two devices, A and B, with a connection, A -> B.\nIf we remove B first, B would clear the reference on B, from A\nvia coresight_remove_match(). But when A is removed, it still has\na connection with fwnode still pointing to B. Thus it tries to  drops\nthe reference in coresight_release_platform_data(), raising the bells\nlike :\n\n[   91.990153] ------------[ cut here ]------------\n[   91.990163] refcount_t: addition on 0; use-after-free.\n[   91.990212] WARNING: CPU: 0 PID: 461 at lib/refcount.c:25 refcount_warn_saturate+0xa0/0x144\n[   91.990260] Modules linked in: coresight_funnel coresight_replicator coresight_etm4x(-)\n crct10dif_ce coresight ip_tables x_tables ipv6 [last unloaded: coresight_cpu_debug]\n[   91.990398] CPU: 0 PID: 461 Comm: rmmod Tainted: G        W       T 5.19.0-rc2+ #53\n[   91.990418] Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Feb  1 2019\n[   91.990434] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[   91.990454] pc : refcount_warn_saturate+0xa0/0x144\n[   91.990476] lr : refcount_warn_saturate+0xa0/0x144\n[   91.990496] sp : ffff80000c843640\n[   91.990509] x29: ffff80000c843640 x28: ffff800009957c28 x27: ffff80000c8439a8\n[   91.990560] x26: ffff00097eff1990 x25: ffff8000092b6ad8 x24: ffff00097eff19a8\n[   91.990610] x23: ffff80000c8439a8 x22: 0000000000000000 x21: ffff80000c8439c2\n[   91.990659] x20: 0000000000000000 x19: ffff00097eff1a10 x18: ffff80000ab99c40\n[   91.990708] x17: 0000000000000000 x16: 0000000000000000 x15: ffff80000abf6fa0\n[   91.990756] x14: 000000000000001d x13: 0a2e656572662d72 x12: 657466612d657375\n[   91.990805] x11: 203b30206e6f206e x10: 6f69746964646120 x9 : ffff8000081aba28\n[   91.990854] x8 : 206e6f206e6f6974 x7 : 69646461203a745f x6 : 746e756f63666572\n[   91.990903] x5 : ffff00097648ec58 x4 : 0000000000000000 x3 : 0000000000000027\n[   91.990952] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff00080260ba00\n[   91.991000] Call trace:\n[   91.991012]  refcount_warn_saturate+0xa0/0x144\n[   91.991034]  kobject_get+0xac/0xb0\n[   91.991055]  of_node_get+0x2c/0x40\n[   91.991076]  of_fwnode_get+0x40/0x60\n[   91.991094]  fwnode_handle_get+0x3c/0x60\n[   91.991116]  fwnode_get_nth_parent+0xf4/0x110\n[   91.991137]  fwnode_full_name_string+0x48/0xc0\n[   91.991158]  device_node_string+0x41c/0x530\n[   91.991178]  pointer+0x320/0x3ec\n[   91.991198]  vsnprintf+0x23c/0x750\n[   91.991217]  vprintk_store+0x104/0x4b0\n[   91.991238]  vprintk_emit+0x8c/0x360\n[   91.991257]  vprintk_default+0x44/0x50\n[   91.991276]  vprintk+0xcc/0xf0\n[   91.991295]  _printk+0x68/0x90\n[   91.991315]  of_node_release+0x13c/0x14c\n[   91.991334]  kobject_put+0x98/0x114\n[   91.991354]  of_node_put+0x24/0x34\n[   91.991372]  of_fwnode_put+0x40/0x5c\n[   91.991390]  fwnode_handle_put+0x38/0x50\n[   91.991411]  coresight_release_platform_data+0x74/0xb0 [coresight]\n[   91.991472]  coresight_unregister+0x64/0xcc [coresight]\n[   91.991525]  etm4_remove_dev+0x64/0x78 [coresight_etm4x]\n[   91.991563]  etm4_remove_amba+0x1c/0x2c [coresight_etm4x]\n[   91.991598]  amba_remove+0x3c/0x19c\n---truncated---"},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: coresight: Borrar el campo de conexión correctamente los dispositivos coresight rastrean sus conexiones (conexiones de salida) y mantienen una referencia al fwnode. Cuando un dispositivo desaparece, recorremos los dispositivos en el bus coresight y nos aseguramos de que se eliminen las referencias. Esto sucede en ambos sentidos: a) Para todas las conexiones de salida desde el dispositivo, eliminamos la referencia al dispositivo de destino mediante coresight_release_platform_data() b) Iteramos sobre todos los dispositivos en el bus coresight y eliminamos la referencia a fwnode si *este* dispositivo es el destino de la conexión de salida, mediante coresight_remove_conns()->coresight_remove_match(). Sin embargo, coresight_remove_match() no borra el campo fwnode, después de eliminar la referencia, esto causa Use-After-Free y disminuciones adicionales de refcount en el fwnode. Por ejemplo, si tenemos dos dispositivos, A y B, conectados, A -> B. Si eliminamos B primero, B eliminaría la referencia en B desde A mediante coresight_remove_match(). Sin embargo, al eliminar A, aún mantiene una conexión con fwnode apuntando a B. Por lo tanto, intenta eliminar la referencia en coresight_release_platform_data(), lo que genera alertas como: [ 91.990153 ------------[ cortar aquí ]------------ [ 91.990163 ] refcount_t: adición en 0; Use-After-Free. [ 91.990212] ADVERTENCIA: CPU: 0 PID: 461 en lib/refcount.c:25 refcount_warn_saturate+0xa0/0x144 [ 91.990260] Módulos vinculados: coresight_funnel coresight_replicator coresight_etm4x(-) crct10dif_ce coresight ip_tables x_tables ipv6 [última descarga: coresight_cpu_debug] [ 91.990398] CPU: 0 PID: 461 Comm: rmmod Contaminado: GWT 5.19.0-rc2+ #53 [ 91.990418] Nombre del hardware: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II 1 de febrero de 2019 [ 91.990434] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 91.990454] pc : refcount_warn_saturate+0xa0/0x144 [ 91.990476] lr : refcount_warn_saturate+0xa0/0x144 [ 91.990496] sp : ffff80000c843640 [ 91.990509] x29: ffff80000c843640 x28: ffff800009957c28 x27: ffff80000c8439a8 [ 91.990560] x26: ffff00097eff1990 x25: ffff8000092b6ad8 x24: ffff00097eff19a8 [91.990610] x23: ffff80000c8439a8 x22: 0000000000000000 x21: ffff80000c8439c2 [91.990659] x20: 0000000000000000 x19: ffff00097eff1a10 x18: ffff80000ab99c40 [91.990708] x17: 000000000000000 x16: 0000000000000000 x15: ffff80000abf6fa0 [ 91.990756] x14: 000000000000001d x13: 0a2e656572662d72 x12: 657466612d657375 [ 91.990805] x11: 203b30206e6f206e x10: 6f69746964646120 x9: ffff8000081aba28 [91.990854] x8: 206e6f206e6f6974 x7: 69646461203a745f x6: 746e756f63666572 [91.990903] x5: ffff00097648ec58 x4: 0000000000000000 x3: 0000000000000027 [91.990952] x2: 0000000000000000 x1: 0000000000000000 x0: ffff00080260ba00 [91.991000] Rastreo de llamadas: [ 91.991012] refcount_warn_saturate+0xa0/0x144 [ 91.991034] kobject_get+0xac/0xb0 [ 91.991055] of_node_get+0x2c/0x40 [ 91.991076] of_fwnode_get+0x40/0x60 [ 91.991094] fwnode_handle_get+0x3c/0x60 [ 91.991116] fwnode_get_nth_parent+0xf4/0x110 [ 91.991137] fwnode_full_name_string+0x48/0xc0 [ 91.991158] device_node_string+0x41c/0x530 [ 91.991178] pointer+0x320/0x3ec [ 91.991198] vsnprintf+0x23c/0x750 [ 91.991217] vprintk_store+0x104/0x4b0 [ 91.991238] vprintk_emit+0x8c/0x360 [ 91.991257] vprintk_default+0x44/0x50 [ 91.991276] vprintk+0xcc/0xf0 [ 91.991295] _printk+0x68/0x90 [ 91.991315] of_node_release+0x13c/0x14c [ 91.991334] kobject_put+0x98/0x114 [ 91.991354] of_node_put+0x24/0x34 [ 91.991372] of_fwnode_put+0x40/0x5c [ 91.991390] fwnode_handle_put+0x38/0x50 [ 91.991411] coresight_release_platform_data+0x74/0xb0 [coresight] [ 91.991472] coresight_unregister+0x64/0xcc [coresight] [ 91.991525] etm4_remove_dev+0x64/0x78 [coresight_etm4x] [ 91.991563] etm4_remove_amba+0x1c/0x2c [coresight_etm4x] [ 91.991598] amba_remove+0x3c/0x19c ---truncado---"}],"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:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"5.4.211","matchCriteriaId":"DABFD37F-7E0C-41E0-9811-29A4EF9C11FB"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.137","matchCriteriaId":"C2BF720F-C5EE-4DE2-9BDF-CE4CFBC767F4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.61","matchCriteriaId":"51861563-7F40-460F-82CD-2D3FBDAD6618"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"5.18.18","matchCriteriaId":"5B42E453-8837-49D0-A5EF-03F818A6DC11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"5.19.2","matchCriteriaId":"A1A2A5A5-4598-4D7E-BA07-4660398D6C8F"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/2af89ebacf299b7fba5f3087d35e8a286ec33706","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/847b9273dd61567fb77617eabc5fa002594db062","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/b49b29ee113a87997bcca0bb0585bb46582846c1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/bc57850fcb7e4cb91b6321d0ce83357cefd55c54","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/d43e967963c4d1b2b49f894d2f1b12865f87b098","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/e9205d8dd1cafb7cff689ef9ddf06276a68f54a4","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}]}