SError / CPU exception panic on iPhone

SError / CPU exception is a kernel panic that makes an iPhone restart on its own, usually leaving a Panic-Full log under Analytics Data. When this error line appears, the first part to check is CPU / RAM / software. Severity is rated high, and confidence in this diagnosis is possible. Below you will find what the error means and its most common causes; to pin down what is wrong with your phone, scan the log with the Panic Scan app.

Basic information

Code

SError / CPU exception

Category

CPU / RAM

Severity

High

Confidence

Possible

Part to check

CPU / RAM / software

What it means

The CPU hit a hardware exception. Read the module name right after SError to find the faulty block.

Common causes

• Software / driver issue
• CPU, RAM
• A peripheral returned bad data

Errors in the same category

• CPU / RAMSEP PanicSecure Enclave (CPU / NAND)Critical
• CPU / RAMGPUGPU in the CPUHigh
• CPU / RAMRAM / memory controllerRAM / CPUCritical
• CPU / RAMSoC watchdog resetCPU / powerHigh
• CPU / RAMRTKit coprocessor crashCoprocessor (ISP, DCP, AOP, ANS...)Medium