What is CVE-2026-6244?

CVE-2026-6244 is a medium-severity vulnerability in The Tcpdump Group Libpcap, classified under Divide By Zero. CVSS score: 5.5/10. Published 2026-09-05.

How severe is CVE-2026-6244?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in The Tcpdump Group Libpcap

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.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

The Tcpdump Group Libpcap

Weakness classification (CWE)

CWE-369 — Divide By Zero

References

security@tcpdump.org (patch)

Frequently asked questions

What is CVE-2026-6244?: CVE-2026-6244 is a medium-severity vulnerability in The Tcpdump Group Libpcap, classified under Divide By Zero. CVSS score: 5.5/10. Published 2026-09-05.
How severe is CVE-2026-6244?: Medium severity. CVSS v3 base score is 5.5 out of 10.