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Unpatchable usbliter8 exploit targets iPhone chips

Feeds.4Sysops •IT News • June 19, 2026

Security researchers have identified a hardware-level vulnerability named usbliter8 that affects Apple's A12 and A13 Bionic chips. This flaw resides in the BootROM, which is the initial code executed by the processor during the device startup process. Because this code is etched into the silicon and cannot be modified, the vulnerability is considered unpatchable through software updates. Source

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Unpatchable usbliter8 Exploit Targets Apple A12 and A13 Devices A newly disclosed BootROM vulnerability, named usbliter8, affects Apple devices with A12 and A13 chips, including iPhone XS, XR, and 11 models. This exploit allows attackers to gain control over the device's boot process by sending specially crafted USB packets during Device Firmware Update (DFU) mode. The vulnerability arises from flaws in the Synopsys DesignWare USB controller and cannot be patched due to its presence in immutable SecureROM code. Affected devices include older iPads and Apple Watches powered by S4 and S5 chips. The exploit requires physical access to the device, making widespread exploitation less likely. However, it opens avenues for compromising the Secure Enclave, which protects sensitive user data. Researchers from Paradigm Shift disclosed the vulnerability on June 18, 2026, coordinating with Apple prior to public release. Users are advised to upgrade to newer hardware to mitigate risks. 29 sources 68

Unpatchable usbliter8 exploit targets iPhone chips

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