Race Condition Affecting kernel-source package, versions <6.4.0-150700.53.84.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.09% (1st percentile)

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  • Snyk IDSNYK-SLES157-KERNELSOURCE-21161131
  • published17 Oct 2026
  • disclosed16 Oct 2026

Introduced: 16 Oct 2026

NewCVE-2026-64038  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 kernel-source to version 6.4.0-150700.53.84.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-source package and not the kernel-source package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

In 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.

CVSS Base Scores

version 3.1