CVE-2026-74552
hwmon: (lm90) Only report alarms if driver is ready
Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (lm90) Only report alarms if driver is ready Userspace can read sysfs attributes before driver registration is complete, immediately after devm_hwmon_device_register_with_info() has been called. At that time, data->hwmon_dev is not yet initialized. This can trigger a NULL pointer access since lm90_update_device() and with it lm90_update_alarms_locked() will be called. This call schedules report_work and lm90_report_alarms(), which passes the still-NULL data->hwmon_dev to hwmon_notify_event() and triggers a NULL pointer dereference. Fix the problem by only scheduling the report and alert workers data->hwmon_dev is set.
INFO
Published Date :
Aug. 15, 2026, 1:18 p.m.
Last Modified :
Aug. 15, 2026, 1:18 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74552
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
- Only schedule report and alert workers when data->hwmon_dev is set.
- Apply kernel patches or update to a fixed Linux kernel version.
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-2026-74552.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74552 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-2026-74552
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-2026-74552 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74552 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': 'f6d0775119fb905fb02eafa98d575cf8ee792d46', 'lessThan': '4eed33c7db5c0c573928d28d8a2c003642c679b8', 'versionType': 'git'}, {'status': 'affected', 'version': 'f6d0775119fb905fb02eafa98d575cf8ee792d46', 'lessThan': '70d9a71aa407044d70b50d356b6decf6659c4d56', 'versionType': 'git'}, {'status': 'affected', 'version': 'f6d0775119fb905fb02eafa98d575cf8ee792d46', 'lessThan': '075fce376cf852db9293481edce07c181a9b1f46', 'versionType': 'git'}, {'status': 'affected', 'version': 'f6d0775119fb905fb02eafa98d575cf8ee792d46', 'lessThan': 'f0b791a006512a48b6348494cb6960598fa99a58', 'versionType': 'git'}, {'status': 'affected', 'version': 'f6d0775119fb905fb02eafa98d575cf8ee792d46', 'lessThan': 'aa9429edf9fc0e90d6f4da19ea4b5495a54ab117', 'versionType': 'git'}], 'programFiles': ['drivers/hwmon/lm90.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.0'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.0', '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/lm90.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: hwmon: (lm90) Only report alarms if driver is ready Userspace can read sysfs attributes before driver registration is complete, immediately after devm_hwmon_device_register_with_info() has been called. At that time, data->hwmon_dev is not yet initialized. This can trigger a NULL pointer access since lm90_update_device() and with it lm90_update_alarms_locked() will be called. This call schedules report_work and lm90_report_alarms(), which passes the still-NULL data->hwmon_dev to hwmon_notify_event() and triggers a NULL pointer dereference. Fix the problem by only scheduling the report and alert workers data->hwmon_dev is set. Added Reference https://git.kernel.org/stable/c/075fce376cf852db9293481edce07c181a9b1f46 Added Reference https://git.kernel.org/stable/c/4eed33c7db5c0c573928d28d8a2c003642c679b8 Added Reference https://git.kernel.org/stable/c/70d9a71aa407044d70b50d356b6decf6659c4d56 Added Reference https://git.kernel.org/stable/c/aa9429edf9fc0e90d6f4da19ea4b5495a54ab117 Added Reference https://git.kernel.org/stable/c/f0b791a006512a48b6348494cb6960598fa99a58