CVE-2026-74547hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 89fac11cb3e7c5860c425dba14845c09ccede39d builds before 2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344; 89fac11cb3e7c5860c425dba14845c09ccede39d builds before 4dc1518f9cc57c6db99514cafeb02dd7117d5bda; from 89fac11cb3e7c5860c425dba14845c09ccede39d before 1325975a2eab265510e6036d8bf0c0068373d332; 89fac11cb3e7c5860c425dba14845c09ccede39d builds before 1a42bd72a66205e439db1d1142442b62d393408a; 89fac11cb3e7c5860c425dba14845c09ccede39d builds before 38e6b5ce5794ff09442231cc171c2be5e900bab3; 89fac11cb3e7c5860c425dba14845c09ccede39d builds before 82d65f7ef11edcea0228745440b8b4b1f222c34c; 89fac11cb3e7c5860c425dba14845c09ccede39d builds before 5ea299c3aa42a827f6a863eeead6de3525bbb17a; from 89fac11cb3e7c5860c425dba14845c09ccede39d before cb0b7f9c43b0abbd422a7e4c2c85e91db429207c | CNA record |
References
- https://git.kernel.org/stable/c/2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344
- https://git.kernel.org/stable/c/4dc1518f9cc57c6db99514cafeb02dd7117d5bda
- https://git.kernel.org/stable/c/1325975a2eab265510e6036d8bf0c0068373d332
- https://git.kernel.org/stable/c/1a42bd72a66205e439db1d1142442b62d393408a
- https://git.kernel.org/stable/c/38e6b5ce5794ff09442231cc171c2be5e900bab3
- https://git.kernel.org/stable/c/82d65f7ef11edcea0228745440b8b4b1f222c34c
- https://git.kernel.org/stable/c/5ea299c3aa42a827f6a863eeead6de3525bbb17a
- https://git.kernel.org/stable/c/cb0b7f9c43b0abbd422a7e4c2c85e91db429207c
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.