CVE-2025-39869
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: ti: edma: Fix memory allocation size for queue_priority_map Fix a critical memory allocation bug in edma_setup_from_hw() where queue_priority_map was allocated with insufficient memory. The code declared queue_priority_map as s8 (*)[2] (pointer to array of 2 s8), but allocated memory using sizeof(s8) instead of the correct size. This caused out-of-bounds memory writes when accessing: queue_priority_map[i][0] = i; queue_priority_map[i][1] = i; The bug manifested as kernel crashes with "Oops - undefined instruction" on ARM platforms (BeagleBoard-X15) during EDMA driver probe, as the memory corruption triggered kernel hardening features on Clang. Change the allocation to use sizeof(*queue_priority_map) which automatically gets the correct size for the 2D array structure.
Severity
HIGH
CVSS score
7.1
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-23 06:15:46.097000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-09-23T06:15:46.097",
"lastModified": "2026-10-19T21:10:00.160",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: ti: edma: Fix memory allocation size for queue_priority_map\n\nFix a critical memory allocation bug in edma_setup_from_hw() where\nqueue_priority_map was allocated with insufficient memory. The code\ndeclared queue_priority_map as s8 (*)[2] (pointer to array of 2 s8),\nbut allocated memory using sizeof(s8) instead of the correct size.\n\nThis caused out-of-bounds memory writes when accessing:\n queue_priority_map[i][0] = i;\n queue_priority_map[i][1] = i;\n\nThe bug manifested as kernel crashes with \"Oops - undefined instruction\"\non ARM platforms (BeagleBoard-X15) during EDMA driver probe, as the\nmemory corruption triggered kernel hardening features on Clang.\n\nChange the allocation to use sizeof(*queue_priority_map) which\nautomatically gets the correct size for the 2D array structure."
},
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"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndmaengine: ti: edma: Corregir el tamaño de asignación de memoria para queue_priority_map\n\nCorregir un error crítico de asignación de memoria en edma_setup_from_hw() donde queue_priority_map fue asignado con memoria insuficiente. El código declaró queue_priority_map como s8 (*)[2] (puntero a un array de 2 s8), pero asignó memoria usando sizeof(s8) en lugar del tamaño correcto.\n\nEsto causó escrituras de memoria fuera de límites al acceder a:\nqueue_priority_map[i][0] = i;\nqueue_priority_map[i][1] = i;\n\nEl error se manifestó como fallos del kernel con 'Oops - undefined instruction' en plataformas ARM (BeagleBoard-X15) durante la sonda del controlador EDMA, ya que la corrupción de memoria activó características de endurecimiento del kernel en Clang.\n\nCambiar la asignación para usar sizeof(*queue_priority_map) lo que obtiene automáticamente el tamaño correcto para la estructura del array 2D."
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