CVE-2026-49421

The kernel function that implements unlinkat2 and funlinkat2 validated the ATRESOLVEBENEATH flag but failed to pass it through to the underlying path lookup. The flag was silently dropped, so path resolution was not actually restricted. A process that uses ATRESOLVEBENEATH with unlinkat2 or...

The vulnerability of system calls unlinkat and funlinkat in the kernels of FreeBSD allows a attacker to compromise the integrity of the protected information.

The vulnerability of the unlinkat and funlinkat system calls in FreeBSD operating systems is related to authentication errors. Exploiting this vulnerability can allow an attacker to compromise the integrity of the protected information...