hwmon: (lm90) Stop work before releasing hwmon device

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64038
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:44 UTC
Updated2026-07-19 16:17:44 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: hwmon: (lm90) Stop work before releasing hwmon device Sashiko reports: In lm90_probe(), the devm action to cancel the alert_work and report_work (lm90_restore_conf) is registered in lm90_init_client() before devm_hwmon_device_register_with_info() is called. Because devm executes cleanup actions in reverse order during module unbind or probe failure, the hwmon device is unregistered and freed first. If lm90_alert_work() or lm90_report_alarms() runs in the window between the hwmon device being freed and the delayed works being cancelled, lm90_update_alarms() will dereference the freed data->hwmon_dev here. Fix the problem by canceling the workers separately after registering the hwmon device and before registering the interrupt handler. This ensures that the workers are canceled after interrupts are disabled and before the hwmon device is released. Add "shutdown" flag to indicate that device shutdown is in progress to prevent workers from being re-armed.

Risk And Classification

EPSS: 0.001660000 probability, percentile 0.061700000 (date 2026-07-20)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f6d0775119fb905fb02eafa98d575cf8ee792d46 c98107817b0f6cdf51adc5e84e75c39ee25d8b28 git Not specified
CNA Linux Linux affected f6d0775119fb905fb02eafa98d575cf8ee792d46 479e297526aeb19c745eac5c1897f455f83dc5f8 git Not specified
CNA Linux Linux affected f6d0775119fb905fb02eafa98d575cf8ee792d46 b09a45601094c7f4ec4db8090b825fa61e169d93 git Not specified
CNA Linux Linux affected 6.0 Not specified
CNA Linux Linux unaffected 6.0 semver Not specified
CNA Linux Linux unaffected 6.18.34 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.11 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/479e297526aeb19c745eac5c1897f455f83dc5f8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b09a45601094c7f4ec4db8090b825fa61e169d93 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c98107817b0f6cdf51adc5e84e75c39ee25d8b28 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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