CVE-2026-6554: high-severity vulnerability in The Tcpdump Group libpcap
infinte loop in libpcap before 1.10.7
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.4%
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. A crafted filter program or the 'protochain' primitive used on a crafted network packet can cause the interpreter to loop infinitely.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
The Tcpdump Group · libpcapRelated CVEs — The Tcpdump Group libpcap
In the same product, most dangerous first.
CVE-2024-8006MEDIUMNULL pointer dereference in libpcap before 1.10.5 with remote packet capture supportEPSS 0.2%CVE-2023-7256MEDIUMDouble-free in libpcap before 1.10.5 with remote packet capture support.EPSS 0.2%CVE-2026-18313MEDIUMrpcapd memory leak in libpcap before 1.10.7EPSS 0.2%CVE-2026-18238MEDIUMOOBR in rpcap client in libpcap before 1.10.7EPSS 0.2%CVE-2026-6244MEDIUMdivision by zero in libpcap before 1.10.7EPSS 0.1%CVE-2025-11964LOWOOBW in utf_16le_to_utf_8_truncated() in libpcapEPSS 0.1%