# CVE-2026-6554

## Summary

- **CVE ID:** CVE-2026-6554
- **Severity:** MEDIUM
- **CVSS Score:** 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-835
- **Published:** Sep 5, 2026
- **Last Modified:** Sep 8, 2026

## Description

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.

## Affected Products

- The Tcpdump Group — libpcap (0)

## References

- [CNA](https://github.com/the-tcpdump-group/libpcap/commit/ff3c83475ac303c6b681c52ad0b6e14795a8e0ce)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.10%
- **EPSS Percentile:** 0.9

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._