CVE-2025-38511

{"id": "CVE-2025-38511", "cveTags": [], "metrics": {}, "published": "2025-08-16T11:15:44.140", "references": [{"url": "https://git.kernel.org/stable/c/5d21892c2e15b6a27f8bc907693eca7c6b7cc269", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/705a412a367f383430fa34bada387af2e52eb043", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ff4b8c9ade1b82979fdd01e6f45b60f92eed26d8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Awaiting Analysis", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/pf: Clear all LMTT pages on alloc\n\nOur LMEM buffer objects are not cleared by default on alloc\nand during VF provisioning we only setup LMTT PTEs for the\nactually provisioned LMEM range. But beyond that valid range\nwe might leave some stale data that could either point to some\nother VFs allocations or even to the PF pages.\n\nExplicitly clear all new LMTT page to avoid the risk that a\nmalicious VF would try to exploit that gap.\n\nWhile around add asserts to catch any undesired PTE overwrites\nand low-level debug traces to track LMTT PT life-cycle.\n\n(cherry picked from commit 3fae6918a3e27cce20ded2551f863fb05d4bef8d)"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/xe/pf: Borrar todas las p\u00e1ginas LMTT al asignar. Nuestros objetos de b\u00fafer LMEM no se borran por defecto al asignar, y durante el aprovisionamiento de VF solo configuramos PTE LMTT para el rango LMEM realmente aprovisionado. Sin embargo, m\u00e1s all\u00e1 de ese rango v\u00e1lido, podr\u00edamos dejar datos obsoletos que podr\u00edan apuntar a otras asignaciones de VF o incluso a las p\u00e1ginas PF. Borre expl\u00edcitamente todas las p\u00e1ginas LMTT nuevas para evitar el riesgo de que una VF maliciosa intente explotar esa brecha. Mientras est\u00e9 disponible, agregue aserciones para detectar cualquier sobrescritura de PTE no deseada y trazas de depuraci\u00f3n de bajo nivel para rastrear el ciclo de vida de las PT LMTT. (Seleccionado de el commit 3fae6918a3e27cce20ded2551f863fb05d4bef8d)"}], "lastModified": "2025-08-18T20:16:28.750", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}