8.2

CVE-2026-33243

barebox: FIT Signature Verification Bypass Vulnerability

barebox is a bootloader. In barebox from version 2016.03.0 to before version 2026.03.1 (and the corresponding backport to 2025.09.3), an attacker could exploit a FIT signature verification vulnerability to trick the bootloader into booting different images than those that were verified as part of a signed configuration. mkimage(1) sets the hashed-nodes property of the FIT signature node to list which nodes of the FIT were hashed as part of the signing process as these will need to be verified later on by the bootloader. However, hashed-nodes itself is not part of the hash and could therefore be modified to allow booting different images than those that have been verified. This issue has been patched in barebox versions 2026.03.1 and backported to 2025.09.3.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Denx ≫ U-boot Version >= 2013.07 < 2026.04
Denx ≫ U-boot Version2026.04 Updaterc1
Denx ≫ U-boot Version2026.04 Updaterc2
Denx ≫ U-boot Version2026.04 Updaterc3
Pengutronix ≫ Barebox Version >= 2016.03.0 < 2025.09.3
Pengutronix ≫ Barebox Version >= 2025.10.0 < 2026.03.1
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.11% 0.014
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 8.2 1.5 6
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE-345 Insufficient Verification of Data Authenticity

The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

https://github.com/barebox/barebox/security/advisories/GHSA-3fvj-q26p-j6h4
Patch
Vendor Advisory
https://github.com/barebox/barebox/commit/aca01795056d51060cb096f9a1ea309361743e05
Patch