# CVE-2025-70290

## Summary

- **CVE ID:** CVE-2025-70290
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Aug 26, 2026
- **Last Modified:** Aug 27, 2026

## Description

An issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability in the ZFS filesystem support can be triggered by malformed on-disk metadata. The issue may result in incorrect memory allocation followed by out-of-bounds memory access, potentially leading to a crash or arbitrary code execution during the boot process.

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](http://u-boot.com)
- [CNA](https://gist.github.com/c0zy1/4d9648d10a5ff07bda2771ea1298e469)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.46%
- **EPSS Percentile:** 38.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._