TOCTOU race-condition vulnerability in Insyde InsydeH2O with Kernel 5.2 before version 05.27.29, Kernel 5.3 before version 05.36.29, Kernel 5.4 version before 05.44.13, and Kernel 5.5 before version 05.52.13 allows an attacker to alter data and code used by the remainder of the boot process.
The product checks the state of a resource before using that resource, but the resource’s state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Insydeh2o | Insyde | 5.2 (including) | 5.2.05.27.29 (excluding) |
| Insydeh2o | Insyde | 5.3 (including) | 5.3.05.36.29 (excluding) |
| Insydeh2o | Insyde | 5.4 (including) | 5.4.05.44.13 (excluding) |
| Insydeh2o | Insyde | 5.5 (including) | 5.5.05.52.13 (excluding) |