CVE-2025-70290

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Published 2026-08-26. Last modified 2026-09-09.