Always-Incorrect Control Flow Implementation in FreeBSD - CVE-2026-49414
Published: June 11, 2026
Vulnerability identifier: #VU134363
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-49414
CWE-ID: CWE-670
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: FreeBSD Foundation
Affected software:
FreeBSD
FreeBSD
Detailed vulnerability description
The vulnerability allows a local user to weaken address space layout randomization protections for setuid executables.
The vulnerability exists due to improper initialization order in the ELF image activator when executing a setuid PIE binary after disabling ASLR with procctl(2). A local user can call procctl(2) before execve(2) to weaken address space layout randomization protections for setuid executables.
This issue affects setuid or setgid PIE binaries and can make exploitation of a separate memory corruption vulnerability significantly easier.
How to mitigate CVE-2026-49414
Install security update from vendor's website.