CVE-2025-71111

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This guarantees that arguments\nare evaluated only once (pass-by-value), preventing the race\nconditions.\n\nAdditionally, in store_fan_div, move the calculation of the minimum\nlimit inside the update lock. This ensures that the read-modify-write\nsequence operates on consistent data.\n\nAdhere to the principle of minimal changes by only converting macros\nthat evaluate arguments multiple times and are used in lockless\ncontexts."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hwmon/w83791d.c"], "versions": [{"version": "9873964d6eb24bd0205394f9b791de9eddbcb855", "lessThan": "3dceb68f6ad33156032ef4da21a93d84059cca6d", "status": "affected", "versionType": "git"}, {"version": "9873964d6eb24bd0205394f9b791de9eddbcb855", "lessThan": "bf5b03227f2e6d4360004886d268f9df8993ef8f", "status": "affected", "versionType": "git"}, {"version": "9873964d6eb24bd0205394f9b791de9eddbcb855", "lessThan": "f2b579a0c37c0df19603d719894a942a295f634a", "status": "affected", "versionType": "git"}, {"version": "9873964d6eb24bd0205394f9b791de9eddbcb855", "lessThan": 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When used\nin lockless contexts involving shared driver data, this leads to\nTime-of-Check to Time-of-Use (TOCTOU) race conditions, potentially\ncausing divide-by-zero errors.\n\nConvert the macro to a static function. This guarantees that arguments\nare evaluated only once (pass-by-value), preventing the race\nconditions.\n\nAdditionally, in store_fan_div, move the calculation of the minimum\nlimit inside the update lock. 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When used\nin lockless contexts involving shared driver data, this leads to\nTime-of-Check to Time-of-Use (TOCTOU) race conditions, potentially\ncausing divide-by-zero errors.\n\nConvert the macro to a static function. This guarantees that arguments\nare evaluated only once (pass-by-value), preventing the race\nconditions.\n\nAdditionally, in store_fan_div, move the calculation of the minimum\nlimit inside the update lock. This ensures that the read-modify-write\nsequence operates on consistent data.\n\nAdhere to the principle of minimal changes by only converting macros\nthat evaluate arguments multiple times and are used in lockless\ncontexts."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nhwmon: (w83791d) Convertir macros a funciones para evitar TOCTOU\n\nLa macro FAN_FROM_REG eval\u00faa sus argumentos m\u00faltiples veces. Cuando se usa en contextos sin bloqueo que involucran datos de controlador compartidos, esto lleva a condiciones de carrera de Tiempo de Verificaci\u00f3n a Tiempo de Uso (TOCTOU), potencialmente causando errores de divisi\u00f3n por cero.\n\nConvertir la macro a una funci\u00f3n est\u00e1tica. Esto garantiza que los argumentos se eval\u00faen solo una vez (paso por valor), previniendo las condiciones de carrera.\n\nAdem\u00e1s, en store_fan_div, mover el c\u00e1lculo del l\u00edmite m\u00ednimo dentro del bloqueo de actualizaci\u00f3n. Esto asegura que la secuencia de lectura-modificaci\u00f3n-escritura opere con datos consistentes.\n\nAdherirse al principio de cambios m\u00ednimos al convertir solo macros que eval\u00faan argumentos m\u00faltiples veces y se usan en contextos sin bloqueo."}], "id": "CVE-2025-71111", "lastModified": "2026-10-19T19:17:12.643", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-71111", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-10T20:42:13.069072Z", "version": "2.0.3"}}]}, "published": "2026-01-14T15:16:00.193", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3dceb68f6ad33156032ef4da21a93d84059cca6d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/670d7ef945d3a84683594429aea6ab2cdfa5ceb4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a9fb6e8835a22f5796c1182ed612daed3fd273af"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bf5b03227f2e6d4360004886d268f9df8993ef8f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c8cf0c2bdcccc6634b6915ff793b844e12436680"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f2b579a0c37c0df19603d719894a942a295f634a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f94800fbc26ccf7c81eb791707b038a57aa39a18"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-367"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-362"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: hwmon: (w83791d) Convert macros to functions to avoid TOCTOU", "id": "2429573", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429573"}, "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": ["No description is available for this CVE."], "name": "CVE-2025-71111", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-01-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-71111\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-71111\nhttps://lore.kernel.org/linux-cve-announce/2026011412-CVE-2025-71111-1547@gregkh/T"], "threat_severity": "Low"}

{}