CVE-2026-74552hwmon: (lm90) Only report alarms if driver is ready
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from f6d0775119fb905fb02eafa98d575cf8ee792d46 before 31ce62d36d859423dc39f9902f7c4c307b2e00e3; from f6d0775119fb905fb02eafa98d575cf8ee792d46 before 4eed33c7db5c0c573928d28d8a2c003642c679b8; from f6d0775119fb905fb02eafa98d575cf8ee792d46 before 70d9a71aa407044d70b50d356b6decf6659c4d56; from f6d0775119fb905fb02eafa98d575cf8ee792d46 before 075fce376cf852db9293481edce07c181a9b1f46; from f6d0775119fb905fb02eafa98d575cf8ee792d46 before f0b791a006512a48b6348494cb6960598fa99a58; from f6d0775119fb905fb02eafa98d575cf8ee792d46 before aa9429edf9fc0e90d6f4da19ea4b5495a54ab117 | CNA record |
References
- https://git.kernel.org/stable/c/31ce62d36d859423dc39f9902f7c4c307b2e00e3
- https://git.kernel.org/stable/c/4eed33c7db5c0c573928d28d8a2c003642c679b8
- https://git.kernel.org/stable/c/70d9a71aa407044d70b50d356b6decf6659c4d56
- https://git.kernel.org/stable/c/075fce376cf852db9293481edce07c181a9b1f46
- https://git.kernel.org/stable/c/f0b791a006512a48b6348494cb6960598fa99a58
- https://git.kernel.org/stable/c/aa9429edf9fc0e90d6f4da19ea4b5495a54ab117
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.