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CVE-2026-11835

5.7 Moyenne

Publiée le 04/08/2026 à 02:16 · Modifiée le 24/10/2026 à 01:10 · En attente d'analyse NVD · Source : b01ddd03-5ef6-483b-b2c5-acba77f1a554

Description

Time-of-check time-of-use (TOCTOU) vulnerability combined with missing input validation in Caliptra Core ROM (UpdateResetFlow::run()) in subsystem mode allows a compromised local attacker to silently bypass secure boot by supplying an AXI staging address that is not validated against the strap-configured SS_EXTERNAL_STAGING_AREA_BASE_ADDR, enabling firmware to be modified between verification and loading into ICCM. Attestation continues to report the originally verified image digest, masking the compromise. Exploitation requires a compromised MCU firmware with AXI manager access to unprotected SRAM reachable by Caliptra. This issue affects Core ROM: 2.1.0 through 2.1.1.

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Produits concernés

Scores CVSS

VersionScoreSourceVecteur
4.0 5.7 Moyenne b01ddd03-5ef6-483b-b2c5-acba77f1a554 CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Faiblesses (CWE)

Références

Ailleurs