CVE-2026-74547None▾ SunlitIn 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 sched…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= 89fac11cb3e7c5860c425dba14845c09ccede39d < 2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344Linux >= 89fac11cb3e7c5860c425dba14845c09ccede39d < 4dc1518f9cc57c6db99514cafeb02dd7117d5bdaLinux >= 89fac11cb3e7c5860c425dba14845c09ccede39d < 1325975a2eab265510e6036d8bf0c0068373d332Linux >= 89fac11cb3e7c5860c425dba14845c09ccede39d < 1a42bd72a66205e439db1d1142442b62d393408aLinux >= 89fac11cb3e7c5860c425dba14845c09ccede39d < 38e6b5ce5794ff09442231cc171c2be5e900bab3Linux >= 89fac11cb3e7c5860c425dba14845c09ccede39d < 82d65f7ef11edcea0228745440b8b4b1f222c34cLinux >= 89fac11cb3e7c5860c425dba14845c09ccede39d < 5ea299c3aa42a827f6a863eeead6de3525bbb17aLinux >= 89fac11cb3e7c5860c425dba14845c09ccede39d < cb0b7f9c43b0abbd422a7e4c2c85e91db429207cLinux 2.6.29Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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