CVE-2026-31911

A flaw was found in libpcap. A local attacker could provide a crafted filter program containing an invalid Berkeley Packet Filter (BPF) opcode. This could cause the operating system (OS) process using libpcap to terminate, leading to a Denial of Service (DoS).

This Moderate impact flaw in libpcap allows a local attacker to cause a denial of service by providing a specially crafted BPF filter program. The vulnerability arises from the BPF interpreter's handling of invalid opcodes, leading to process termination in uncommon scenarios where untrusted BPF filters are processed.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.