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Vulnerability record · CVE-2025-70290 · published 26 August 2026

CVE-2025-70290: Integer overflow vulnerability

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.

9.8 CVSS 3.1 Critical EPSS 0.67% · top 49.9% CWE-190 · Integer overflowCWE-787 · Out-of-bounds write Deferred
9.8CVSS 3.1 base score
0.67%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
9 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

LinkTags
http://u-boot.com
https://gist.github.com/c0zy1/4d9648d10a5ff07bda2771ea1298e469

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-70290), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.