CVE-2026-31912: The Tcpdump Group Libpcap

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

libpcap BPF interpreter detects neither reaching the end of the filter program buffer due to lack of a return instruction nor executing a jump instruction with an offset that translates to a pointer outside of the buffer. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer on 64-bit architectures and in the entire address space on 32-bit architectures.

Affected products

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

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