| Package | Affected versions | Patched versions |
|---|---|---|
| openshift container platform | = 3.11 | |
| virtualization host | = 4.0 |
The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.
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