CVE-2026-64213
In the Linux kernel, the following vulnerability has been resolved: hwmon: (lm90) Add lock protection to lm90_alert Sashiko reports: lm90_alert() executes in t…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linux | Linux Kernel | from 5.3 before 6.18.34 from 6.19 before 7.0.11 Version 7.1 |
References
- NVD record
- CVE.org record
- https://git.kernel.org/stable/c/02b88fa993582b4fe228b4143b330b0bb9f28353
- https://git.kernel.org/stable/c/165ef777ec6f634a5e4b8d9b0dadca8ef91fa90e
- https://git.kernel.org/stable/c/1dc6a3469b5427e3bfd19010d7755ebc6019abc1
- https://git.kernel.org/stable/c/873e919e3101063a7a75989510ccfc125a4391cf
- https://git.kernel.org/stable/c/b0b66aae8a94c3663d47e4000b0e81b89ce32186
- https://git.kernel.org/stable/c/bed1fc32e0eb653806fa98afcf55f9a311fc4ce2