CVE-2026-31911: The Tcpdump Group Libpcap

Medium severity, CVSS 5.5. EPSS: 0.1% chance of exploitation in the next 30 days.

libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an invalid opcode. In particular uncommon use cases a crafted filter program can terminate the OS process.

Affected products

• The Tcpdump Group Libpcap: before 1.10.7 (fixed in 1.10.7)

Published 2026-09-05. Last modified 2026-09-08.