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.
Published: 2026-08-26
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Fri, 28 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 28 Aug 2026 18:45:00 +0000

Type Values Removed Values Added
Title Denx U‑Boot ZFS Filesystem Integer Overflow leading to Arbitrary Code Execution during Boot

Fri, 28 Aug 2026 07:00:00 +0000

Type Values Removed Values Added
Title Integer Overflow in Denx U‑Boot ZFS Support Enables Boot‑time Arbitrary Code Execution
Weaknesses CWE-119

Thu, 27 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-787
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Wed, 26 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
Title Integer Overflow in Denx U‑Boot ZFS Support Enables Boot‑time Arbitrary Code Execution
Weaknesses CWE-119
CWE-190

Wed, 26 Aug 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared U-boot
U-boot u-boot
Vendors & Products U-boot
U-boot u-boot

Wed, 26 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
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.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-27T19:10:50.219Z

Reserved: 2026-01-09T00:00:00.000Z

Link: CVE-2025-70290

cve-icon Vulnrichment

Updated: 2026-08-27T19:10:40.937Z

cve-icon NVD

Status : Received

Published: 2026-08-26T20:16:59.550

Modified: 2026-08-27T20:17:01.917

Link: CVE-2025-70290

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T18:30:08Z

Weaknesses