CVE-2026-49415: Freebsd

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

During execve(2) of a SUID binary, the new virtual address space is installed before the process credentials are updated. During this window, a process running as the same user can access the target process's memory via procfs or linprocfs, because the kernel's debugging permission check still saw the original credentials. An unprivileged local user can exploit this race to modify the address space of a SUID binary before its credentials are elevated, potentially gaining full control of the affected system.

Affected products

• Freebsd Freebsd: version 14.3 only; version 14.4 only; version 15.0 only; version 15.1 only

Published 2026-08-19. Last modified 2026-09-01.