CVE-2026-49414 ASLR bypass for setuid executables via procctl(2)
An unprivileged local user can bypass ASLR for setuid binaries, facilitating exploitation of memory corruption vulnerabilities in FreeBSD.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-49414?
CVE-2026-49414 is a high-severity vulnerability in Freebsd Freebsd, published on 27 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The ELF image activator cleared per-process ASLR preference flags for setuid binaries after the code that computes the PIE base address, rather than before. As a result, a user-requested ASLR disable was still in effect at the point where the base address was chosen.
An unprivileged local user can disable ASLR for a setuid PIE binary by calling procctl(2) before execve(2). This makes exploitation of any separate memory corruption vulnerability in that binary significantly easier.
Weakness: CWE-179
Which versions are affected by CVE-2026-49414?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2026-49414?
No fix has been published for CVE-2026-49414 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-49414 being exploited?
There is no known exploitation of CVE-2026-49414 in the wild and no public exploit code.