CVE-2026-33243
HighCVSS 8.2Exploitation Probability (EPSS)
Low risk1th percentile - higher than 1% of all known CVEs
Summary
W barebox, bootloaderze, występuje podatność na weryfikację podpisu FIT, która pozwala atakującemu na oszukanie bootloadera w celu uruchomienia innych obrazów niż te, które zostały zweryfikowane w ramach podpisanej konfiguracji. Problem dotyczy wersji od 2016.03.0 do przed 2026.03.1 oraz odpowiednich backportów do 2025.09.3.
Risk Assessment
Wykorzystanie tej podatności może prowadzić do uruchomienia nieautoryzowanych obrazów, co stwarza poważne zagrożenie dla integralności systemu i bezpieczeństwa danych w organizacji.
Recommendation
Zaleca się aktualizację do wersji barebox 2026.03.1 lub zastosowanie backportu do 2025.09.3, aby usunąć tę podatność.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

