CVE-2026-6554 [MEDIUM] – libpcap BPF interpreter treats the offset in the ‘ja L’ BPF instruction as a signed intege

libpcap BPF interpreter treats the offset in the ‘ja L’ BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. In particular uncommon use cases a crafted filter program can cause the interpreter to loop infinitely.