Freed-pointer dereference via lm90 teardown race
Published Jul 19, 2026 · Updated Jul 19, 2026
Use-after-free in the Linux Kernel lm90 hardware-monitor driver from 6.0 allows attackers to dereference freed memory during device teardown. In lm90_probe(), reverse-order cleanup frees data->hwmon_dev before alert_work and report_work are canceled, allowing lm90_update_alarms() to use the stale pointer. The race requires supported sensor hardware plus module unbind or probe failure while work is pending; no privilege escalation or code execution is reported.
Summary
What happened
Use-after-free in the Linux Kernel lm90 hardware-monitor driver from 6.0 allows attackers to dereference freed memory during device teardown. In lm90_probe(), reverse-order cleanup frees data->hwmon_dev before alert_work and report_work are canceled, allowing lm90_update_alarms() to use the stale pointer. The race requires supported sensor hardware plus module unbind or probe failure while work is pending; no privilege escalation or code execution is reported.
The record
- CVE
- CVE-2026-64038
- Published
- Jul 19, 2026
- Updated
- Jul 19, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Jul 19, 2026CVE publishedPublication date reported by the CVE source.
- Jul 19, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=6.0
- Affected versionversion=f6d0775119fb905fb02eafa98d575cf8ee792d46 <479e297526aeb19c745eac5c1897f455f83dc5f8
- Affected versionversion=f6d0775119fb905fb02eafa98d575cf8ee792d46 <b09a45601094c7f4ec4db8090b825fa61e169d93
- Affected versionversion=f6d0775119fb905fb02eafa98d575cf8ee792d46 <c98107817b0f6cdf51adc5e84e75c39ee25d8b28
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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