– In 2024, researchers demonstrated that the RPMB authentication scheme in eMMCs from major manufacturers could be bypassed using Electromagnetic Fault Injection (EMFI). The CVE associated with Samsung eMMC chips (CVE‑2024‑31955) describes a code‑bypass vulnerability that allowed an attacker to write to the RPMB without the correct key. When a device or chipset is described as “patched,” it means the manufacturer has issued firmware updates or hardware revisions that close these EMFI or other attack vectors, making unauthorized RPMB writing much harder.
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Because the eMMC specification states that the RPMB key cannot be erased once written, standard hardware programmers cannot reset it. To achieve a clean state on a used chip, developers and engineering teams patch the internal controller firmware of the SK Hynix eMMC. clean rpmb emmc skhynix patched
Cleaning RPMB can also mean programming a new key that matches your SoC. To do this: – In 2024, researchers demonstrated that the RPMB