Description
Das U-Boot before 2026.04 allows FIT (Flat Image Tree) signature verification bypass because hashed-nodes is omitted from a hash.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| denx | U-Boot | < 2026.04 | 2026.04 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | u-boot | 2025.01-3.2 | — |
| Debian 13 | u-boot | 2025.01-3+deb13u1 | — |
| Debian 12 | u-boot | 2023.01+dfsg-2+deb12u3 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | u-boot | No fix yet | — |
| Ubuntu 26.04 LTS | u-boot | No fix yet | — |
| Ubuntu 25.10 | u-boot | No fix yet | — |
| Ubuntu 24.04 LTS | u-boot +1 | No fix yet | — |
| Ubuntu 22.04 LTS | u-boot +1 | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | u-boot | No fix yet | — |
| Ubuntu Pro 18.04 LTS | u-boot | No fix yet | — |
| Ubuntu Pro 16.04 LTS | u-boot | No fix yet | — |
Advisories 1
- WID-SEC-2026-2060 DENX U-Boot: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Jun 24, 2026