CVE-2022-49504

{"id": "CVE-2022-49504", "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": "2025-02-26T07:01:26.543", "references": [{"url": "https://git.kernel.org/stable/c/a1516930cb605caee3bc7b4f3b7994b88c0b8505", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ead76d4c09b89f4c8d632648026a476a5a34fde8", "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\nscsi: lpfc: Inhibit aborts if external loopback plug is inserted\n\nAfter running a short external loopback test, when the external loopback is\nremoved and a normal cable inserted that is directly connected to a target\ndevice, the system oops in the llpfc_set_rrq_active() routine.\n\nWhen the loopback was inserted an FLOGI was transmit. As we're looped back,\nwe receive the FLOGI request. The FLOGI is ABTS'd as we recognize the same\nwppn thus understand it's a loopback. However, as the ABTS sends address\ninformation the port is not set to (fffffe), the ABTS is dropped on the\nwire. A short 1 frame loopback test is run and completes before the ABTS\ntimes out. The looback is unplugged and the new cable plugged in, and the\nan FLOGI to the new device occurs and completes. Due to a mixup in ref\ncounting the completion of the new FLOGI releases the fabric ndlp. Then the\noriginal ABTS completes and references the released ndlp generating the\noops.\n\nCorrect by no-op'ing the ABTS when in loopback mode (it will be dropped\nanyway). Added a flag to track the mode to recognize when it should be\nno-op'd."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: lpfc: Inhibit aborta si se inserta un enchufe de loopback externo Despu\u00e9s de ejecutar una prueba de loopback externa corta, cuando se quita el loopback externo y se inserta un cable normal que est\u00e1 conectado directamente a un dispositivo de destino, el sistema falla en la rutina llpfc_set_rrq_active(). Cuando se insert\u00f3 el loopback, se transmiti\u00f3 un FLOGI. Mientras estamos en loopback, recibimos la solicitud FLOGI. El FLOGI se ABTS ya que reconocemos el mismo wppn, por lo que entendemos que es un loopback. Sin embargo, como el ABTS env\u00eda informaci\u00f3n de direcci\u00f3n, el puerto no est\u00e1 configurado en (fffffe), el ABTS se descarta en el cable. Se ejecuta una prueba de loopback corta de 1 trama y se completa antes de que el ABTS se agote. El looback se desconecta y el nuevo cable se enchufa, y se produce un FLOGI al nuevo dispositivo y se completa. Debido a una confusi\u00f3n en el recuento de referencias, la finalizaci\u00f3n del nuevo FLOGI libera el ndlp de la estructura. Luego, el ABTS original se completa y hace referencia al ndlp liberado, lo que genera el error. Se corrige no operando el ABTS cuando est\u00e1 en modo de bucle invertido (se descartar\u00e1 de todos modos). Se agreg\u00f3 una bandera para rastrear el modo para reconocer cu\u00e1ndo se debe no operar."}], "lastModified": "2025-10-21T12:09:27.027", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3108C4DF-1578-4A9A-ADC7-1128DE921D69", "versionEndExcluding": "5.18.3"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}