In FreeBSD before 11.2-STABLE(r343782), 11.2-RELEASE-p9, 12.0-STABLE(r343781), and 12.0-RELEASE-p3, kernel callee-save registers are not properly sanitized before return from system calls, potentially allowing some kernel data used in the system call to be exposed.
The product does not properly “clean up” and remove temporary or supporting resources after they have been used.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Freebsd | Freebsd | 11.2 (including) | 11.2 (including) |
| Freebsd | Freebsd | 12.0 (including) | 12.0 (including) |