Fix was already merged to Android, however, there are millions of devices that will never be updated. The nice question: can this be used for temp-rooting? Vulnerabilities can be a blessing sometimes...
Luckily, almost all (if not just all) these millions of devices which will never be updated never ever received the vulnerable version in the first place. The bug was only introduced in 5.8 and due to how hardware vendors work phones are still stuck in 4.19 ages (or better, 5.4. but no 5.10 besides Pixel 6)
Based on the description, sounds like it should be quite possible.