Unknown

CVE-2026-74547 — hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread

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.

Published Aug 15, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.18%

ahead of 7% of scored CVEs · Oct 29, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 89fac11cb3e7c5860c425dba14845c09ccede39d and < 2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344≥ 89fac11cb3e7c5860c425dba14845c09ccede39d and < 4dc1518f9cc57c6db99514cafeb02dd7117d5bda≥ 89fac11cb3e7c5860c425dba14845c09ccede39d and < 1325975a2eab265510e6036d8bf0c0068373d332≥ 89fac11cb3e7c5860c425dba14845c09ccede39d and < 1a42bd72a66205e439db1d1142442b62d393408a≥ 89fac11cb3e7c5860c425dba14845c09ccede39d and < 38e6b5ce5794ff09442231cc171c2be5e900bab3≥ 89fac11cb3e7c5860c425dba14845c09ccede39d and < 82d65f7ef11edcea0228745440b8b4b1f222c34c≥ 89fac11cb3e7c5860c425dba14845c09ccede39d and < 5ea299c3aa42a827f6a863eeead6de3525bbb17a≥ 89fac11cb3e7c5860c425dba14845c09ccede39d and < cb0b7f9c43b0abbd422a7e4c2c85e91db429207c and 1 more version 2.6.29	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 29, 2026 · 14 reading(s) · max 0.18%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 15, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/cb0b7f9c43b0abbd422a7e4c2c85e91db429207c
NIST National Vulnerability Database
git.kernel.org/stable/c/4dc1518f9cc57c6db99514cafeb02dd7117d5bda
NIST National Vulnerability Database
git.kernel.org/stable/c/1325975a2eab265510e6036d8bf0c0068373d332
NIST National Vulnerability Database
git.kernel.org/stable/c/82d65f7ef11edcea0228745440b8b4b1f222c34c
NIST National Vulnerability Database
git.kernel.org/stable/c/5ea299c3aa42a827f6a863eeead6de3525bbb17a
NIST National Vulnerability Database
git.kernel.org/stable/c/2c4c4d7cadd10b50b5489183bbbb9eb95f6f8344
NIST National Vulnerability Database
git.kernel.org/stable/c/38e6b5ce5794ff09442231cc171c2be5e900bab3
NIST National Vulnerability Database
git.kernel.org/stable/c/1a42bd72a66205e439db1d1142442b62d393408a
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-99216 Drivers: hv: Don't reset VMBus connection state on error/exit paths 2d
Unknown CVE-2026-99215 power: supply: core: prevent unregistering a power supply while a callback runs 2d
Unknown CVE-2026-99207 scsi: target: Disable interrupts while holding delayed_cmd_lock 2d
Unknown CVE-2026-99208 drm/xe/oa: Zero OA buffer at allocation 2d
Unknown CVE-2026-99209 drm/xe: skip eviction of a BO with no resource 2d
Unknown CVE-2026-99210 accel/rocket: clear rdev on device init failure 2d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-74547 is "hwmon: (adt7470) Fix busy-loop and I2C flooding in update thread", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.18% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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