Get a Demo

Let's Patch It!

Book a short call with one our specialists, we'll walk you through how Endor Patches work, and ask you a few questions about your environment (like your primary programming languages and repository management). We'll also send you an email right after you fill out the form, feel free to reply with any questions you have in advance!

CVE

CVE-2026-33243

barebox: FIT Signature Verification Bypass Vulnerability
Back to all
CVE

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.

Package Versions Affected

Package Version
patch Availability
No items found.

Automatically patch vulnerabilities without upgrading

Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request

CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.2
-
3.1
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33243.json, https://github.com/barebox/barebox/security/advisories/GHSA-3fvj-q26p-j6h4, https://nvd.nist.gov/vuln/detail/CVE-2026-33243, https://github.com/barebox/barebox/commit/aca01795056d51060cb096f9a1ea309361743e05

Severity

8.2

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
8.2
EPSS Probability
0.00003%
EPSS Percentile
0.0014%
Introduced Version
1d8493e63b13954cb16d0304285271dfac208758,1f40283a172d1c4b81befe5745a85027a5607551,2013.07
Fix Available
51e471d3e84e105e906dd449179f53a5e5c63847,1d386a53086d28a0c4eda138ae9408a418b97b7e,2026.04

Fix Critical Vulnerabilities Instantly

Secure your app without upgrading.
Fix Without Upgrading