CVE-2026-74685: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: hwmon: (ltc4282) Clamp negative current limits When a negative value is passed to ltc4282_write_curr(), the signed long val is cast directly to u64: drivers/hwmon/ltc4282.c:ltc4282_write_curr() { /* need to pass it in millivolt */ u32 in = DIV_ROUND_CLOSEST_ULL((u64)val * st->rsense, DECA * MICRO); ... } This cast converts negative inputs into large positive values. The subsequent division result overflows the u32 in variable, truncating to a pseudo-random positive value. When this is passed to ltc4282_write_voltage_byte(), it is clamped to the maximum limit instead of zero. Clamp val to 0 and to the maximum supported upper limit before the cast and assign the result to a 64-bit temporary variable before the division to avoid the underflow and an also possible overflow.

Засегнати продукти

• Linux Linux: cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 преди 60e06c4dba696173982393252a40ceb7dd2eec18; cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 преди de58b90a4d1417c15b693eb04c0ce6bc925d84c6; cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 преди 046e56b53c09375ef39903514496aa5508db9729; cbc29538dbf7d7400f1ffc5dd5713e6a551463a0 преди e253dd5f9f6d875a317895bf43ec9534ed7523cb
• Linux Linux: 6.9; преди 6.9; 6.12.104 до 6.12.*; 6.18.45 до 6.18.*; 7.1.9 до 7.1.*; от 7.2 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-74685
• https://nvd.nist.gov/vuln/detail/CVE-2026-74685
• https://git.kernel.org/stable/c/60e06c4dba696173982393252a40ceb7dd2eec18
• https://git.kernel.org/stable/c/de58b90a4d1417c15b693eb04c0ce6bc925d84c6
• https://git.kernel.org/stable/c/046e56b53c09375ef39903514496aa5508db9729
• https://git.kernel.org/stable/c/e253dd5f9f6d875a317895bf43ec9534ed7523cb