{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-05-04T19:01:24.523","vulnerabilities":[{"cve":{"id":"CVE-2025-38217","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-07-04T14:15:30.227","lastModified":"2025-11-18T15:21:06.057","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (ftsteutates) Fix TOCTOU race in fts_read()\n\nIn the fts_read() function, when handling hwmon_pwm_auto_channels_temp,\nthe code accesses the shared variable data->fan_source[channel] twice\nwithout holding any locks. It is first checked against\nFTS_FAN_SOURCE_INVALID, and if the check passes, it is read again\nwhen used as an argument to the BIT() macro.\n\nThis creates a Time-of-Check to Time-of-Use (TOCTOU) race condition.\nAnother thread executing fts_update_device() can modify the value of\ndata->fan_source[channel] between the check and its use. If the value\nis changed to FTS_FAN_SOURCE_INVALID (0xff) during this window, the\nBIT() macro will be called with a large shift value (BIT(255)).\nA bit shift by a value greater than or equal to the type width is\nundefined behavior and can lead to a crash or incorrect values being\nreturned to userspace.\n\nFix this by reading data->fan_source[channel] into a local variable\nonce, eliminating the race condition. Additionally, add a bounds check\nto ensure the value is less than BITS_PER_LONG before passing it to\nthe BIT() macro, making the code more robust against undefined behavior.\n\nThis possible bug was found by an experimental static analysis tool\ndeveloped by our team."},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: hwmon: (ftsteutates) Corregir la ejecución TOCTOU en fts_read() En la función fts_read(), al manejar hwmon_pwm_auto_channels_temp, el código accede a la variable compartida data->fan_source[channel] dos veces sin mantener ningún bloqueo. Primero se compara con FTS_FAN_SOURCE_INVALID y, si la comprobación es correcta, se vuelve a leer cuando se usa como argumento de la macro BIT(). Esto crea una condición de ejecución de tiempo de comprobación a tiempo de uso (TOCTOU). Otro hilo que ejecute fts_update_device() puede modificar el valor de data->fan_source[channel] entre la comprobación y su uso. Si el valor se cambia a FTS_FAN_SOURCE_INVALID (0xff) durante esta ventana, se llamará a la macro BIT() con un valor de desplazamiento grande (BIT(255)). Un desplazamiento de bits por un valor mayor o igual al ancho del tipo es un comportamiento indefinido que puede provocar un fallo o la devolución de valores incorrectos al espacio de usuario. Para solucionarlo, lea data->fan_source[channel] en una variable local una vez, eliminando así la condición de ejecución. Además, añada una comprobación de los límites para garantizar que el valor sea menor que BITS_PER_LONG antes de pasarlo a la macro BIT(), lo que aumenta la robustez del código frente a comportamientos indefinidos. Este posible error fue detectado por una herramienta de análisis estático experimental desarrollada por nuestro equipo."}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":4.7,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.0,"impactScore":3.6}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-367"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.6.95","matchCriteriaId":"1C7D3F86-080A-4F34-855C-33AACBE752AC"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.35","matchCriteriaId":"E569FD34-0076-4428-BE17-EECCF867611C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.15.4","matchCriteriaId":"DFD174C5-1AA2-4671-BDDC-1A9FCC753655"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*","matchCriteriaId":"6D4894DB-CCFE-4602-B1BF-3960B2E19A01"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*","matchCriteriaId":"09709862-E348-4378-8632-5A7813EDDC86"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/14c9ede9ca4cd078ad76a6ab9617b81074eb58bf","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/4d646f627d3b7ed1cacca66e598af8bcd632d465","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/83e2ba8971ccd8fc08319fc7593288f070d80a76","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/d95d87841d2a575bed3691884e8fedef57d7710d","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}]}