🚨 CVE-2026-6244
libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check whether the immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division by zero.
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GitHub
CVE-2026-6244: Avoid division by zero via pcap_offline_filter(). · the-tcpdump-group/libpcap@98bb921
The current revision of pcapint_filter_with_aux_data() for "div x" and
"mod x" correctly rejects the packet if X is zero, but for "div #k" and
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September 5, 2026 53
