# CVE-2026-31912

## Summary

- **CVE ID:** CVE-2026-31912
- **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-1285, CWE-823, CWE-125
- **Published:** Sep 5, 2026
- **Last Modified:** Sep 8, 2026

## Description

libpcap BPF interpreter detects neither reaching the end of the filter program buffer due to lack of a return instruction nor executing a jump instruction with an offset that translates to a pointer outside of the buffer.  In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer on 64-bit architectures and in the entire address space on 32-bit architectures.

## Affected Products

- The Tcpdump Group — libpcap (0)

## References

- [CNA](https://github.com/the-tcpdump-group/libpcap/commit/d3f358d3cffbe1ecb94d5284b3e81f052a0adcb9)

## Exploitation Prediction (EPSS)

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

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