CVE-2026-74547
Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread When userspace configures 'auto_update_interval' to 0 via sysfs, the background kthread executes schedule_timeout_interruptible(0), which returns immediately. If 'num_temp_sensors' is concurrently or previously set to 0, the msleep_interruptible() delay inside adt7470_read_temperatures() also becomes 0. This combination forces the background thread into a tight, unbounded busy-loop, hogging the CPU and flooding the I2C bus with a continuous stream of transactions. Fix this vulnerability by raising the lower limit of the clamp_val in auto_update_interval_store() from 0 to 500 milliseconds. This guarantees a reasonable minimum sleep window between sensor updates, protecting the system from intentional or accidental I2C bus denial of service.
How to fix
- Linux Linux2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344, 4dc1518f9cc57c6db99514cafeb02dd7117d5bda, 1325975a2eab265510e6036d8bf0c0068373d332, 1a42bd72a66205e439db1d1142442b62d393408a, 38e6b5ce5794ff09442231cc171c2be5e900bab3, 82d65f7ef11edcea0228745440b8b4b1f222c34c, 5ea299c3aa42a827f6a863eeead6de3525bbb17a, cb0b7f9c43b0abbd422a7e4c2c85e91db429207c or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 89fac11cb3e7c5860c425dba14845c09ccede39d ≤ v < 2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344, 89fac11cb3e7c5860c425dba14845c09ccede39d ≤ v < 4dc1518f9cc57c6db99514cafeb02dd7117d5bda, 89fac11cb3e7c5860c425dba14845c09ccede39d ≤ v < 1325975a2eab265510e6036d8bf0c0068373d332, 89fac11cb3e7c5860c425dba14845c09ccede39d ≤ v < 1a42bd72a66205e439db1d1142442b62d393408a, 89fac11cb3e7c5860c425dba14845c09ccede39d ≤ v < 38e6b5ce5794ff09442231cc171c2be5e900bab3, 89fac11cb3e7c5860c425dba14845c09ccede39d ≤ v < 82d65f7ef11edcea0228745440b8b4b1f222c34c, 89fac11cb3e7c5860c425dba14845c09ccede39d ≤ v < 5ea299c3aa42a827f6a863eeead6de3525bbb17a, 89fac11cb3e7c5860c425dba14845c09ccede39d ≤ v < cb0b7f9c43b0abbd422a7e4c2c85e91db429207c, 2.6.29 | 2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344, 4dc1518f9cc57c6db99514cafeb02dd7117d5bda, 1325975a2eab265510e6036d8bf0c0068373d332, 1a42bd72a66205e439db1d1142442b62d393408a, 38e6b5ce5794ff09442231cc171c2be5e900bab3, 82d65f7ef11edcea0228745440b8b4b1f222c34c, 5ea299c3aa42a827f6a863eeead6de3525bbb17a, cb0b7f9c43b0abbd422a7e4c2c85e91db429207c |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.