Description
The (1) execve and (2) fexecve system calls in the FreeBSD kernel 8.4 before p11, 9.1 before p14, 9.2 before p7, and 10.0 before p4 destroys the virtual memory address space and mappings for a process before all threads have terminated, which allows local users to cause a denial of service (triple-fault and system reboot) via a crafted system call, which triggers an invalid page table pointer dereference.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | kfreebsd-9 | 9.0-10+deb70.7 | DSA-2952-1 |
Advisories 1
- DSA-2952-1 kfreebsd-9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-2952 vendor-advisory
- 59034 third-party-advisory
- http://www.freebsd.org/security/advisories/FreeBSD-EN-14%3A06.exec.asc