Stack Buffer Overflow in libalias Affects FreeBSD

CVE-2026-49420

What is CVE-2026-49420?

A vulnerability exists in the RTSP handler of libalias where outgoing packets are rewritten into a fixed-length stack buffer without adequate bounds checking. This can lead to a stack buffer overflow, which, when exploited by sending crafted RTSP traffic from within a NAT gateway, may enable an attacker to execute arbitrary code in the kernel or within the natd process, often with root privileges. Organizations relying on FreeBSD systems should take immediate action to mitigate the risks associated with this vulnerability.

References