Strix
57.6K

CVE-2026-74547

UnknownEPSS 0.17%

Last modified

CVE-2026-74547 is a vulnerability of currently unknown severity. 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. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.17%

6.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 89fac11cb3e7c5860c425dba14845c09ccede39d, < 2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344; >= 89fac11cb3e7c5860c425dba14845c09ccede39d, < 4dc1518f9cc57c6db99514cafeb02dd7117d5bda; >= 89fac11cb3e7c5860c425dba14845c09ccede39d, < 1325975a2eab265510e6036d8bf0c0068373d332; >= 89fac11cb3e7c5860c425dba14845c09ccede39d, < 1a42bd72a66205e439db1d1142442b62d393408a; >= 89fac11cb3e7c5860c425dba14845c09ccede39d, < 38e6b5ce5794ff09442231cc171c2be5e900bab3; >= 89fac11cb3e7c5860c425dba14845c09ccede39d, < 82d65f7ef11edcea0228745440b8b4b1f222c34c; >= 89fac11cb3e7c5860c425dba14845c09ccede39d, < 5ea299c3aa42a827f6a863eeead6de3525bbb17a; >= 89fac11cb3e7c5860c425dba14845c09ccede39d, < cb0b7f9c43b0abbd422a7e4c2c85e91db429207c
LinuxLinux2.6.29

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74547?
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 severe is CVE-2026-74547?
Severity scoring for CVE-2026-74547 is pending analysis. The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74547?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-74547?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST