CVE-2025-39921
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: spi: microchip-core-qspi: stop checking viability of op->max_freq in supports_op callback In commit 13529647743d9 ("spi: microchip-core-qspi: Support per spi-mem operation frequency switches") the logic for checking the viability of op->max_freq in mchp_coreqspi_setup_clock() was copied into mchp_coreqspi_supports_op(). Unfortunately, op->max_freq is not valid when this function is called during probe but is instead zero. Accordingly, baud_rate_val is calculated to be INT_MAX due to division by zero, causing probe of the attached memory device to fail. Seemingly spi-microchip-core-qspi was the only driver that had such a modification made to its supports_op callback when the per_op_freq capability was added, so just remove it to restore prior functionality.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-10-01 08:15:35.370000
Last modified
2026-10-21 13:18:16.753000
View original CVE JSON
{
"id": "CVE-2025-39921",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-10-01T08:15:35.370",
"lastModified": "2026-10-21T13:18:16.753",
"vulnStatus": "Modified",
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: microchip-core-qspi: stop checking viability of op->max_freq in supports_op callback\n\nIn commit 13529647743d9 (\"spi: microchip-core-qspi: Support per spi-mem\noperation frequency switches\") the logic for checking the viability of\nop->max_freq in mchp_coreqspi_setup_clock() was copied into\nmchp_coreqspi_supports_op(). Unfortunately, op->max_freq is not valid\nwhen this function is called during probe but is instead zero.\nAccordingly, baud_rate_val is calculated to be INT_MAX due to division\nby zero, causing probe of the attached memory device to fail.\n\nSeemingly spi-microchip-core-qspi was the only driver that had such a\nmodification made to its supports_op callback when the per_op_freq\ncapability was added, so just remove it to restore prior functionality."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nspi: microchip-core-qspi: dejar de comprobar la viabilidad de op->max_freq en la función de callback supports_op\n\nEn el commit 13529647743d9 ('spi: microchip-core-qspi: Soporte para conmutadores de frecuencia de operación por spi-mem'), la lógica para comprobar la viabilidad de op->max_freq en mchp_coreqspi_setup_clock() fue copiada a mchp_coreqspi_supports_op(). Desafortunadamente, op->max_freq no es válido cuando esta función es llamada durante la fase de 'probe', sino que es cero. En consecuencia, baud_rate_val se calcula como INT_MAX debido a una división por cero, lo que provoca que la detección ('probe') del dispositivo de memoria adjunto falle.\n\nAparentemente, spi-microchip-core-qspi fue el único controlador al que se le hizo tal modificación en su callback supports_op cuando se añadió la capacidad per_op_freq, así que simplemente se elimina para restaurar la funcionalidad anterior."
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"description": [
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"configurations": [
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