CVE-2026-74546
hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read
Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read If the fan data becomes 0 between the FAN_DATA_VALID() check and the FAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash due to a race with a concurrent update of the cached fan value. Fix a TOCTOU issue by reading fan data once.
INFO
Published Date :
Aug. 15, 2026, 1:17 p.m.
Last Modified :
Aug. 15, 2026, 1:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74546
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Apply the Linux kernel patch for the adt7470 driver.
- Update the Linux kernel to a fixed version.
- Read fan data once to resolve TOCTOU race condition.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-74546.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74546 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-74546
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-74546 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74546 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'fc958a61ff6d34a0ec42744d3ff524ee202b2e9f', 'lessThan': 'd328175045176f85c15c369bd21dc551351e7935', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc958a61ff6d34a0ec42744d3ff524ee202b2e9f', 'lessThan': '832069bec79cf6f903441c5769d3cdba95d0af33', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc958a61ff6d34a0ec42744d3ff524ee202b2e9f', 'lessThan': '96ad57d31763559d376416cdf3bf5ae79bbbebec', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc958a61ff6d34a0ec42744d3ff524ee202b2e9f', 'lessThan': '76963b04b2d1c648d69949d8dd521e1ff7f40b51', 'versionType': 'git'}, {'status': 'affected', 'version': 'fc958a61ff6d34a0ec42744d3ff524ee202b2e9f', 'lessThan': '1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3', 'versionType': 'git'}], 'programFiles': ['drivers/hwmon/adt7470.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.15'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.15', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.151', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.103', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.44', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/hwmon/adt7470.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: hwmon: (adt7470) Fix divide-by-zero TOCTOU crash in fan speed read If the fan data becomes 0 between the FAN_DATA_VALID() check and the FAN_PERIOD_TO_RPM() conversion, it will result in a divide-by-zero crash due to a race with a concurrent update of the cached fan value. Fix a TOCTOU issue by reading fan data once. Added Reference https://git.kernel.org/stable/c/1b46fe9dc8f8de59310f37e6c5e5c0e05ded46c3 Added Reference https://git.kernel.org/stable/c/76963b04b2d1c648d69949d8dd521e1ff7f40b51 Added Reference https://git.kernel.org/stable/c/832069bec79cf6f903441c5769d3cdba95d0af33 Added Reference https://git.kernel.org/stable/c/96ad57d31763559d376416cdf3bf5ae79bbbebec Added Reference https://git.kernel.org/stable/c/d328175045176f85c15c369bd21dc551351e7935