https://devzone.nordicsemi.com/f/nordic-q-a/127672/kernel-panic-nfc-context-is-bigger-than-expected-ncs-v3-2-2-zephyr-v4-2-99Hello, My application crashes with a Kernel Panic (ZEPHYR FATAL ERROR 4) during NFC communication : ASSERTION FAIL [ header.ctx_size &lt;= 16 ] @ WEST_TOPDIR/nrf/subsys/nfc/lib/platform_internal_thread.c:122 NFC context is bigger than expected. Een-USTelligent Community 13Tue, 07 Apr 2026 11:41:12 GMThttps://devzone.nordicsemi.com/thread/564505?ContentTypeID=1Tue, 07 Apr 2026 11:41:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d18726b8-4157-45b4-8800-f9c16e8e2f86Vidar Berg<p>Hello,</p> <p>The context size is configurable through the CONFIG_NFC_LIB_CTX_MAX_SIZE Kconfig symbol. Default is 16 bytes, but it can be configured for up to 255 bytes depending on how much is required for your application.</p> <p><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1775562069100v2.png" alt=" " /></p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>