Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.3, < 6.18.34 |
References
- https://git.kernel.org/stable/c/873e919e3101063a7a75989510ccfc125a4391cfPatch
- https://git.kernel.org/stable/c/b0b66aae8a94c3663d47e4000b0e81b89ce32186Patch
- https://git.kernel.org/stable/c/bed1fc32e0eb653806fa98afcf55f9a311fc4ce2Patch
FAQ
What is CVE-2026-64213?
CVE-2026-64213 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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_...
How severe is CVE-2026-64213?
CVE-2026-64213 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-64213?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.