CVE-2022-49223

{"id": "CVE-2022-49223", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2025-02-26T07:00:59.363", "references": [{"url": "https://git.kernel.org/stable/c/49f2dab77a5e1354f5da6ccdc9346a8212697be2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/518bb96367123062b48b0a9842f2864249b565f6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/74be98774dfbc5b8b795db726bd772e735d2edd4", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b0022ca445d5fc4d0c89d15dcd0f855977b22c1d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/port: Hold port reference until decoder release\n\nKASAN + DEBUG_KOBJECT_RELEASE reports a potential use-after-free in\ncxl_decoder_release() where it goes to reference its parent, a cxl_port,\nto free its id back to port->decoder_ida.\n\n BUG: KASAN: use-after-free in to_cxl_port+0x18/0x90 [cxl_core]\n Read of size 8 at addr ffff888119270908 by task kworker/35:2/379\n\n CPU: 35 PID: 379 Comm: kworker/35:2 Tainted: G OE 5.17.0-rc2+ #198\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n Workqueue: events kobject_delayed_cleanup\n Call Trace:\n <TASK>\n dump_stack_lvl+0x59/0x73\n print_address_description.constprop.0+0x1f/0x150\n ? to_cxl_port+0x18/0x90 [cxl_core]\n kasan_report.cold+0x83/0xdf\n ? to_cxl_port+0x18/0x90 [cxl_core]\n to_cxl_port+0x18/0x90 [cxl_core]\n cxl_decoder_release+0x2a/0x60 [cxl_core]\n device_release+0x5f/0x100\n kobject_cleanup+0x80/0x1c0\n\nThe device core only guarantees parent lifetime until all children are\nunregistered. If a child needs a parent to complete its ->release()\ncallback that child needs to hold a reference to extend the lifetime of\nthe parent."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cxl/port: Mantener la referencia del puerto hasta la liberaci\u00f3n del decodificador KASAN + DEBUG_KOBJECT_RELEASE informa un posible use-after-free en cxl_decoder_release() donde va a referenciar a su padre, un cxl_port, para liberar su id a port-&gt;decoder_ida. ERROR: KASAN: use-after-free en to_cxl_port+0x18/0x90 [cxl_core] Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff888119270908 por la tarea kworker/35:2/379 CPU: 35 PID: 379 Comm: kworker/35:2 Contaminado: G OE 5.17.0-rc2+ #198 Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 Cola de trabajo: eventos kobject_delayed_cleanup Rastreo de llamadas: dump_stack_lvl+0x59/0x73 print_address_description.constprop.0+0x1f/0x150 ? to_cxl_port+0x18/0x90 [cxl_core] kasan_report.cold+0x83/0xdf ? to_cxl_port+0x18/0x90 [cxl_core] to_cxl_port+0x18/0x90 [cxl_core] cxl_decoder_release+0x2a/0x60 [cxl_core] device_release+0x5f/0x100 kobject_cleanup+0x80/0x1c0 El n\u00facleo del dispositivo solo garantiza la duraci\u00f3n del elemento primario hasta que se anule el registro de todos los elementos secundarios. Si un elemento secundario necesita un elemento primario para completar su devoluci\u00f3n de llamada -&gt;release(), ese elemento secundario debe contener una referencia para extender la duraci\u00f3n del elemento primario."}], "lastModified": "2025-03-25T15:07:53.967", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "761DDEC2-EE3F-4A67-B08A-052842A9A1A5", "versionEndExcluding": "5.15.54", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "20C43679-0439-405A-B97F-685BEE50613B", "versionEndExcluding": "5.16.19", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "210C679C-CF84-44A3-8939-E629C87E54BF", "versionEndExcluding": "5.17.2", "versionStartIncluding": "5.17"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}