Race condition in the _get_masked_mode function in Lib/os.py in Python 3.2 through 3.5, when exist_ok is set to true and multiple threads are used, might allow local users to bypass intended file permissions by leveraging a separate application vulnerability before the umask has been set to the expected value.
| Product | Vendor | Version |
|---|---|---|
| n/a | n/a | < 10.0.19043.1766 |