Review reviewHigh

CVE-2026-46728

denx U-Boot, u-boot, barebox

Das U-Boot before 2026.04 allows FIT (Flat Image Tree) signature verification bypass because hashed-nodes is omitted from a hash.

CVSS
8.8
EPSS
0.16%
5.55% percentile
CISA KEV
Not listed
Published
2026.05.17
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.16%
Technical severityCVSS 8.8

Vulnerability overview

Das U-Boot before 2026.04 allows FIT (Flat Image Tree) signature verification bypass because hashed-nodes is omitted from a hash.

Affected product and versions

Product
denx U-Boot, u-boot, barebox
Affected versions
< 2026.04, >= 2013.07 <= 2025.10, >= 2016.03.0 < 2025.09.3, >= 2025.10.0 < 2026.03.1
Fixed versions
2025.09.3, 2026.03.1

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that denx U-Boot, u-boot, barebox and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
CWE-346
CVE-2026-46728 — denx U-Boot, u-boot, barebox | SECUFOCUS NOW