Buffer Issue in libpcap BPF Interpreter Leads to Process Termination Risk

CVE-2026-31911

What is CVE-2026-31911?

The libpcap BPF interpreter may encounter a serious vulnerability where encountering an invalid opcode in a BPF instruction can lead to an abrupt process termination. This occurs particularly in uncommon use cases where a specially crafted filter program is executed, potentially compromising the stability of the operating system process. This vulnerability highlights the necessity for vigilance in handling BPF instructions and reinforces the importance of patching to maintain operational integrity.

References