CVE-2026-64213 (GCVE-0-2026-64213)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:23 – Updated: 2026-07-24 15:23
VLAI
Title
hwmon: (lm90) Add lock protection to lm90_alert
Summary
In the Linux kernel, the following vulnerability has been resolved: hwmon: (lm90) Add lock protection to lm90_alert Sashiko reports: lm90_alert() executes in the smbus alert context and calls lm90_update_confreg() to disable the hardware alert line, without acquiring hwmon_lock. Concurrently, sysfs write operations (such as lm90_write_convrate) hold the hwmon_lock, temporarily modify data->config, and then restore it. If an alert interrupt occurs concurrently with a sysfs write, the sysfs path will overwrite the alert handler's modifications to data->config and the hardware register. This unintentionally re-enables the hardware alert line while the alarm is still active, causing an interrupt storm. Add the missing lock to lm90_alert() to solve the problem.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f , < bed1fc32e0eb653806fa98afcf55f9a311fc4ce2 (git)
Affected: 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f , < b0b66aae8a94c3663d47e4000b0e81b89ce32186 (git)
Affected: 7a1d220ccb0cc2b808eb176fb05bf55a38179f3f , < 873e919e3101063a7a75989510ccfc125a4391cf (git)
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Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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