CVE-2022-49654

{"id": "CVE-2022-49654", "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": "2025-02-26T07:01:40.510", "references": [{"url": "https://git.kernel.org/stable/c/188c798f3c2554fa0d7147e9b97baf144b817019", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1993f5a06736ada59dd54b50dc96755a38796ee5", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/386228c694bf1e7a7688e44412cb33500b0ac585", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: qca8k: reset cpu port on MTU change\n\nIt was discovered that the Documentation lacks of a fundamental detail\non how to correctly change the MAX_FRAME_SIZE of the switch.\n\nIn fact if the MAX_FRAME_SIZE is changed while the cpu port is on, the\nswitch panics and cease to send any packet. This cause the mgmt ethernet\nsystem to not receive any packet (the slow fallback still works) and\nmakes the device not reachable. To recover from this a switch reset is\nrequired.\n\nTo correctly handle this, turn off the cpu ports before changing the\nMAX_FRAME_SIZE and turn on again after the value is applied."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: dsa: qca8k: restablecer el puerto de la CPU al cambiar la MTU Se descubri\u00f3 que la Documentaci\u00f3n carece de un detalle fundamental sobre c\u00f3mo cambiar correctamente el MAX_FRAME_SIZE del conmutador. De hecho, si se cambia MAX_FRAME_SIZE mientras el puerto de la CPU est\u00e1 encendido, el conmutador entra en p\u00e1nico y deja de enviar paquetes. Esto hace que el sistema Ethernet de administraci\u00f3n no reciba ning\u00fan paquete (la recuperaci\u00f3n lenta a\u00fan funciona) y hace que el dispositivo no sea accesible. Para recuperarse de esto, se requiere un reinicio del conmutador. Para gestionar esto correctamente, apague los puertos de la CPU antes de cambiar MAX_FRAME_SIZE y vuelva a encenderlos despu\u00e9s de que se aplique el valor."}], "lastModified": "2025-10-23T12:10:32.530", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "708DCCCF-C8E9-43AD-A089-AE3BB40C6369", "versionEndExcluding": "5.15.54", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "622F881E-3317-4653-9558-86008C2FBFD2", "versionEndExcluding": "5.18.11", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A8C30C2D-F82D-4D37-AB48-D76ABFBD5377"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BF8547FC-C849-4F1B-804B-A93AE2F04A92"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F3068028-F453-4A1C-B80F-3F5609ACEF60"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}