CVE-2022-49134

{"id": "CVE-2022-49134", "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": "2025-02-26T07:00:50.680", "references": [{"url": "https://git.kernel.org/stable/c/4cad27ba2e5a5843a7fab5aa30de2b8e8c3db3a8", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bcdfd615f83b4bd04678109bf18022d1476e4bbf", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmlxsw: spectrum: Guard against invalid local ports\n\nWhen processing events generated by the device's firmware, the driver\nprotects itself from events reported for non-existent local ports, but\nnot for the CPU port (local port 0), which exists, but does not have all\nthe fields as any local port.\n\nThis can result in a NULL pointer dereference when trying access\n'struct mlxsw_sp_port' fields which are not initialized for CPU port.\n\nCommit 63b08b1f6834 (\"mlxsw: spectrum: Protect driver from buggy firmware\")\nalready handled such issue by bailing early when processing a PUDE event\nreported for the CPU port.\n\nGeneralize the approach by moving the check to a common function and\nmaking use of it in all relevant places."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mlxsw: spectrum: Proteger contra puertos locales no v\u00e1lidos Al procesar eventos generados por el firmware del dispositivo, el controlador se protege a s\u00ed mismo de los eventos informados para puertos locales inexistentes, pero no para el puerto de la CPU (puerto local 0), que existe, pero no tiene todos los campos como cualquier puerto local. Esto puede resultar en una desreferencia de puntero NULL al intentar acceder a los campos 'struct mlxsw_sp_port' que no est\u00e1n inicializados para el puerto de la CPU. el commit 63b08b1f6834 (\"mlxsw: spectrum: Proteger al controlador del firmware con errores\") ya manej\u00f3 este problema al abandonar temprano al procesar un evento PUDE informado para el puerto de la CPU. Generalice el enfoque moviendo la verificaci\u00f3n a una funci\u00f3n com\u00fan y haciendo uso de ella en todos los lugares relevantes."}], "lastModified": "2025-03-13T21:31:21.910", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "68AC7372-D098-4584-A82A-1F7CD731042F", "versionEndExcluding": "5.17.3"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}