# CVE-2026-31911

## Summary

- **CVE ID:** CVE-2026-31911
- **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-617
- **Published:** Sep 5, 2026
- **Last Modified:** Sep 8, 2026

## Description

libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an invalid opcode.  In particular uncommon use cases a crafted filter program can terminate the OS process.

## Affected Products

- The Tcpdump Group — libpcap (0)

## References

- [CNA](https://github.com/the-tcpdump-group/libpcap/commit/a715bcdde830299cba4171514385cb17ec19b6e9)

## Exploitation Prediction (EPSS)

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

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._