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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-74552

hwmon: (lm90) Only report alarms if driver is ready

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • f6d0775119fb905fb02eafa98d575cf8ee792d46 to < 31ce62d36d859423dc39f9902f7c4c307b2e00e3affected
  • f6d0775119fb905fb02eafa98d575cf8ee792d46 to < 4eed33c7db5c0c573928d28d8a2c003642c679b8affected
  • f6d0775119fb905fb02eafa98d575cf8ee792d46 to < 70d9a71aa407044d70b50d356b6decf6659c4d56affected
  • f6d0775119fb905fb02eafa98d575cf8ee792d46 to < 075fce376cf852db9293481edce07c181a9b1f46affected
  • f6d0775119fb905fb02eafa98d575cf8ee792d46 to < f0b791a006512a48b6348494cb6960598fa99a58affected
  • f6d0775119fb905fb02eafa98d575cf8ee792d46 to < aa9429edf9fc0e90d6f4da19ea4b5495a54ab117affected

Linux Linux

Default version status: affected

  • 6.0affected
  • 0 to < 6.0unaffected
  • 6.1.183 to ≤ 6.1.*unaffected
  • 6.6.151 to ≤ 6.6.*unaffected
  • 6.12.103 to ≤ 6.12.*unaffected
  • 6.18.44 to ≤ 6.18.*unaffected
  • 7.1.8 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References