{"id":"CVE-2026-74685","summary":"hwmon: (ltc4282) Clamp negative current limits","details":"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/ltc4282.c:ltc4282_write_curr() {\n        /* need to pass it in millivolt */\n        u32 in = DIV_ROUND_CLOSEST_ULL((u64)val * st-\u003ersense, 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.","modified":"2026-08-24T11:47:20.435123263Z","published":"2026-08-22T15:32:51.493Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74685.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/046e56b53c09375ef39903514496aa5508db9729"},{"type":"WEB","url":"https://git.kernel.org/stable/c/60e06c4dba696173982393252a40ceb7dd2eec18"},{"type":"WEB","url":"https://git.kernel.org/stable/c/de58b90a4d1417c15b693eb04c0ce6bc925d84c6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e253dd5f9f6d875a317895bf43ec9534ed7523cb"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74685.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74685"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cbc29538dbf7d7400f1ffc5dd5713e6a551463a0"},{"fixed":"60e06c4dba696173982393252a40ceb7dd2eec18"},{"fixed":"de58b90a4d1417c15b693eb04c0ce6bc925d84c6"},{"fixed":"046e56b53c09375ef39903514496aa5508db9729"},{"fixed":"e253dd5f9f6d875a317895bf43ec9534ed7523cb"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74685.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.9.0"},{"fixed":"6.12.104"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.45"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74685.json"}}],"schema_version":"1.9.0"}