{"id":"CVE-2026-74685","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (ltc4282) Clamp negative current limits\n\nWhen a negative value is passed to ltc4282_write_curr(), the signed long\nval is cast directly to u64:\n\ndrivers/hwmon/ltc…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (ltc4282) Clamp negative current limits\n\nWhen a negative value is passed to ltc4282_write_curr(), the signed long\nval is cast directly to u64:\n\ndrivers/hwmon/ltc…","severity":"none","published":"2026-08-22","updated":"2026-10-14","sourceUpdated":"2026-10-14T13:10:00.187","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74685","references":[{"url":"https://git.kernel.org/stable/c/046e56b53c09375ef39903514496aa5508db9729","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/60e06c4dba696173982393252a40ceb7dd2eec18","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/de58b90a4d1417c15b693eb04c0ce6bc925d84c6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e253dd5f9f6d875a317895bf43ec9534ed7523cb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00209,"epssPercentile":0.10256,"ingestedAt":"2026-10-14T13:30:58.537Z","slug":"CVE-2026-74685","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (ltc4282) Clamp negative current limits\n\nWhen a negative value is passed to ltc4282_write_curr(), the signed long\nval is cast directly to u64:\n\ndrivers/hwmon/ltc4282.c:ltc4282_write_curr() {\n        /* need to pass it in millivolt */\n        u32 in = DIV_ROUND_CLOSEST_ULL((u64)val * st->rsense, DECA * MICRO);\n        ...\n}\n\nThis cast converts negative inputs into large positive values. The\nsubsequent division result overflows the u32 in variable, truncating\nto a pseudo-random positive value. When this is passed to\nltc4282_write_voltage_byte(), it is clamped to the maximum limit instead\nof zero.\n\nClamp val to 0 and to the maximum supported upper limit before the cast\nand assign the result to a 64-bit temporary variable before the division\nto avoid the underflow and an also possible overflow.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}