CVE-2022-49896

{"id": "CVE-2022-49896", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2025-05-01T15:16:14.643", "references": [{"url": "https://git.kernel.org/stable/c/4d07ae22e79ebc2d7528bbc69daa53b86981cb3a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f43b6bfdbab78606735ba81185cf0602b81e40b6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-Other"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/pmem: Fix cxl_pmem_region and cxl_memdev leak\n\nWhen a cxl_nvdimm object goes through a ->remove() event (device\nphysically removed, nvdimm-bridge disabled, or nvdimm device disabled),\nthen any associated regions must also be disabled. As highlighted by the\ncxl-create-region.sh test [1], a single device may host multiple\nregions, but the driver was only tracking one region at a time. This\nleads to a situation where only the last enabled region per nvdimm\ndevice is cleaned up properly. Other regions are leaked, and this also\ncauses cxl_memdev reference leaks.\n\nFix the tracking by allowing cxl_nvdimm objects to track multiple region\nassociations."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cxl/pmem: Arregla la fuga de cxl_pmem_region y cxl_memdev Cuando un objeto cxl_nvdimm pasa por un evento ->remove() (dispositivo eliminado f\u00edsicamente, nvdimm-bridge deshabilitado o dispositivo nvdimm deshabilitado), entonces cualquier regi\u00f3n asociada tambi\u00e9n debe deshabilitarse. Como se destaca en la prueba cxl-create-region.sh [1], un solo dispositivo puede albergar m\u00faltiples regiones, pero el controlador solo rastreaba una regi\u00f3n a la vez. Esto lleva a una situaci\u00f3n en la que solo la \u00faltima regi\u00f3n habilitada por dispositivo nvdimm se limpia correctamente. Se filtran otras regiones, y esto tambi\u00e9n causa fugas de referencia de cxl_memdev. Arregla el rastreo permitiendo que los objetos cxl_nvdimm rastreen m\u00faltiples asociaciones de regiones."}], "lastModified": "2025-05-07T13:19:15.073", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2AE8E086-9C21-4A47-A505-C5DBF09AAA5A", "versionEndExcluding": "6.0.8", "versionStartIncluding": "6.0"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}