CVE-2026-46728 Details
Description
Das U-Boot before 2026.04 allows FIT (Flat Image Tree) signature verification bypass because hashed-nodes is omitted from a hash.
A vulnerability exists in Das U-Boot versions through 2025.10 and in Barebox versions 2016.03.0 prior to 2026.04, allowing a bypass of the Flat Image Tree (FIT) signature verification. This issue arises because the 'hashed-nodes' property, which indicates which nodes were included in the signature hash, is not properly validated. An attacker with local or physical access can exploit this by modifying the 'hashed-nodes' property to deceive the bootloader into loading unverified images. The vulnerability can lead to unauthorized code execution, potentially compromising the kernel and, depending on the bootloader and platform, other system components such as the hypervisor or trusted services.
Users can update to Barebox versions 2026.03.1 or 2025.09.3, or to U-Boot versions 2026.07-rc2 or 2026.04-rc4, which include patches for this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 18, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/barebox/barebox/security/advisories/GHSA-3fvj-q26p-j6h4 | [email protected] | ExploitPatchVendor Advisory |
| https://github.com/u-boot/u-boot/commit/2092322b31cc8b1f8c9e2e238d1043ae0637b241 | [email protected] | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-346 | Origin Validation Error | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| denx u-boot | >= 2013.07, < 2026.04 2026.04 rc1 2026.04 rc2 2026.04 rc3 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 11, 2026 | Reanalysis | [email protected] |
| Jul 14, 2026 | Initial Analysis | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 16, 2026 | New CVE Received | [email protected] |