JAILBREAKING MY CAR'S NAVIGATION SYSTEM JUST SO I CAN CHANGE THE TIME

Summary from the TLDR Dev newsletter

A Renault's clock settings were inaccessible without a legitimate navigation SD card, turning a daylight-saving adjustment into a firmware reverse-engineering project. QEMU emulation exposed how a script parser's file writes and Linux's core-dump handling could combine into code execution. The eventual fix changed the stored GPS time offset from 180 minutes to 120.