DarkFlippers/unleashed-firmware

NFC emulate ISO15693-3 Flipper crash and reboot

Open

#902 opened on May 20, 2025

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bughelp wanted

Description

Describe the bug.

During NFC ISO15693-3 emulation of a certain access card, FLIPPER crashed and was rebooted. I think I tried all the possibilities: disabling animations, debug mode and everything that can be changed in the settings. The strange thing is that the emulation of the ISO15693-3 card works fine, without hanging the Flipper only on XTREME software. In order for flipper to crash, you need to to simulate a terminal reading this card, you can use an android phone and Taginfo program. When trying to read with the phone, the same situation occurs as with the terminal - Flipper crashes and restarts. Greetings. Best Regards

Reproduction

  1. upload the NFC file from the flipper attachment: sd card/nfc;
  2. turn on the flipper;
  3. select NFC;
  4. select the previously uploaded “tech” file;
  5. emulate IT

tech.zip

Target

No response

Logs

Contributor guide

Tech stack
c
Domain
security
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Flipper Zero deviceNFC card file (tech.zip)basic knowledge of embedded debugging
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
45
Research direction
Investigate the crash during ISO15693-3 emulation. The issue is reproducible by uploading the provided tech.zip NFC file and emulating it while reading with an Android phone. Focus on the emulation handler for ISO15693-3, checking for buffer overflows or null pointer dereferences. Compare with XTREME software version where it works to identify differences.