CVE-2025-37813

{"id": "CVE-2025-37813", "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": "2025-05-08T07:15:52.523", "references": [{"url": "https://git.kernel.org/stable/c/0624e29c595b05e7a0e6d1c368f0a05799928e30", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/142273a49f2c315eabdbdf5a71c15e479b75ca91", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/1ea050da5562af9b930d17cbbe9632d30f5df43a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bce3055b08e303e28a8751f6073066f5c33a0744", "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\nusb: xhci: Fix invalid pointer dereference in Etron workaround\n\nThis check is performed before prepare_transfer() and prepare_ring(), so\nenqueue can already point at the final link TRB of a segment. And indeed\nit will, some 0.4% of times this code is called.\n\nThen enqueue + 1 is an invalid pointer. It will crash the kernel right\naway or load some junk which may look like a link TRB and cause the real\nlink TRB to be replaced with a NOOP. This wouldn't end well.\n\nUse a functionally equivalent test which doesn't dereference the pointer\nand always gives correct result.\n\nSomething has crashed my machine twice in recent days while playing with\nan Etron HC, and a control transfer stress test ran for confirmation has\njust crashed it again. The same test passes with this patch applied."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: usb: xhci: Corregir desreferencia de puntero no v\u00e1lida en el workaround de Etron Esta comprobaci\u00f3n se realiza antes de prepare_transfer() y prepare_ring(), por lo que enqueue ya puede apuntar al TRB de enlace final de un segmento. Y de hecho lo har\u00e1, alrededor del 0,4% de las veces que se llama a este c\u00f3digo. Entonces enqueue + 1 es un puntero no v\u00e1lido. Har\u00e1 que el kernel se caiga de inmediato o cargar\u00e1 algo basura que puede parecer un TRB de enlace y hacer que el TRB de enlace real se reemplace con un NOOP. Esto no terminar\u00eda bien. Utilice una prueba funcionalmente equivalente que no desreferencia el puntero y siempre d\u00e9 un resultado correcto. Algo ha hecho que mi m\u00e1quina se caiga dos veces en los \u00faltimos d\u00edas mientras jugaba con un Etron HC, y una prueba de estr\u00e9s de transferencia de control ejecutada para confirmaci\u00f3n la acaba de hacer caer de nuevo. La misma prueba pasa con este parche aplicado."}], "lastModified": "2025-11-12T21:38:20.607", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6FDE6FA3-7A79-4C87-96F2-B09634A5DCE5", "versionEndExcluding": "6.6.89", "versionStartIncluding": "6.6.66"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4CBF5F6E-D446-4CAE-AAA4-413442319824", "versionEndExcluding": "6.12", "versionStartIncluding": "6.11.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "72659C84-F6D7-4B6C-8B36-B232E56EDB64", "versionEndExcluding": "6.12.26", "versionStartIncluding": "6.12.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6B25CA7E-4CD0-46DB-B4EF-13A3516071FB", "versionEndExcluding": "6.14.5", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8D465631-2980-487A-8E65-40AE2B9F8ED1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4C9D071F-B28E-46EC-AC61-22B913390211"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "13FC0DDE-E513-465E-9E81-515702D49B74"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}