CVE-2025-38217

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-38217", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.995Z", "datePublished": "2025-07-04T13:37:34.532Z", "dateUpdated": "2026-05-11T21:23:30.209Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:23:30.209Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hwmon/ftsteutates.c"], "versions": [{"version": "1c5759d8ce054961b454af69568a41e7e3210ee1", "lessThan": "d95d87841d2a575bed3691884e8fedef57d7710d", "status": "affected", "versionType": "git"}, {"version": "1c5759d8ce054961b454af69568a41e7e3210ee1", "lessThan": "83e2ba8971ccd8fc08319fc7593288f070d80a76", "status": "affected", "versionType": "git"}, {"version": "1c5759d8ce054961b454af69568a41e7e3210ee1", "lessThan": "4d646f627d3b7ed1cacca66e598af8bcd632d465", "status": "affected", "versionType": "git"}, {"version": "1c5759d8ce054961b454af69568a41e7e3210ee1", "lessThan": "14c9ede9ca4cd078ad76a6ab9617b81074eb58bf", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hwmon/ftsteutates.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.95", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.35", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.15.4", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.6.95"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.15.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.16"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d95d87841d2a575bed3691884e8fedef57d7710d"}, {"url": "https://git.kernel.org/stable/c/83e2ba8971ccd8fc08319fc7593288f070d80a76"}, {"url": "https://git.kernel.org/stable/c/4d646f627d3b7ed1cacca66e598af8bcd632d465"}, {"url": "https://git.kernel.org/stable/c/14c9ede9ca4cd078ad76a6ab9617b81074eb58bf"}], "title": "hwmon: (ftsteutates) Fix TOCTOU race in fts_read()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/hwmon/ftsteutates.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d95d87841d2a575bed3691884e8fedef57d7710d", "status": "affected", "version": "1c5759d8ce054961b454af69568a41e7e3210ee1", "versionType": "git"}, {"lessThan": "83e2ba8971ccd8fc08319fc7593288f070d80a76", "status": "affected", "version": "1c5759d8ce054961b454af69568a41e7e3210ee1", "versionType": "git"}, {"lessThan": "4d646f627d3b7ed1cacca66e598af8bcd632d465", "status": "affected", "version": "1c5759d8ce054961b454af69568a41e7e3210ee1", "versionType": "git"}, {"lessThan": "14c9ede9ca4cd078ad76a6ab9617b81074eb58bf", "status": "affected", "version": "1c5759d8ce054961b454af69568a41e7e3210ee1", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/hwmon/ftsteutates.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"lessThan": "6.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.95", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.35", "versionType": "semver"}, {"lessThanOrEqual": "6.15.*", "status": "unaffected", "version": "6.15.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.16", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1C7D3F86-080A-4F34-855C-33AACBE752AC", "versionEndExcluding": "6.6.95", "versionStartIncluding": "6.3", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E569FD34-0076-4428-BE17-EECCF867611C", "versionEndExcluding": "6.12.35", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "DFD174C5-1AA2-4671-BDDC-1A9FCC753655", "versionEndExcluding": "6.15.4", "versionStartIncluding": "6.13", "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", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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 ejecuci\u00f3n TOCTOU en fts_read() En la funci\u00f3n fts_read(), al manejar hwmon_pwm_auto_channels_temp, el c\u00f3digo accede a la variable compartida data->fan_source[channel] dos veces sin mantener ning\u00fan bloqueo. Primero se compara con FTS_FAN_SOURCE_INVALID y, si la comprobaci\u00f3n es correcta, se vuelve a leer cuando se usa como argumento de la macro BIT(). Esto crea una condici\u00f3n de ejecuci\u00f3n de tiempo de comprobaci\u00f3n a tiempo de uso (TOCTOU). Otro hilo que ejecute fts_update_device() puede modificar el valor de data->fan_source[channel] entre la comprobaci\u00f3n y su uso. Si el valor se cambia a FTS_FAN_SOURCE_INVALID (0xff) durante esta ventana, se llamar\u00e1 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 devoluci\u00f3n de valores incorrectos al espacio de usuario. Para solucionarlo, lea data->fan_source[channel] en una variable local una vez, eliminando as\u00ed la condici\u00f3n de ejecuci\u00f3n. Adem\u00e1s, a\u00f1ada una comprobaci\u00f3n de los l\u00edmites para garantizar que el valor sea menor que BITS_PER_LONG antes de pasarlo a la macro BIT(), lo que aumenta la robustez del c\u00f3digo frente a comportamientos indefinidos. Este posible error fue detectado por una herramienta de an\u00e1lisis est\u00e1tico experimental desarrollada por nuestro equipo."}], "id": "CVE-2025-38217", "lastModified": "2026-06-17T09:16:24.533", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-07-04T14:15:30.227", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-367"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: hwmon: (ftsteutates) Fix TOCTOU race in fts_read()", "id": "2376378", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2376378"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nhwmon: (ftsteutates) Fix TOCTOU race in fts_read()\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.\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.\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.\nThis possible bug was found by an experimental static analysis tool\ndeveloped by our team."], "name": "CVE-2025-38217", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-07-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-38217\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-38217\nhttps://lore.kernel.org/linux-cve-announce/2025070424-CVE-2025-38217-d1ab@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-13T21:47:50.937606+00:00", "updated": "2025-07-13T21:47:50.937657+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}