Zephyr Project Files

This is a bugfix release for Zephyr 4.2.1. This will be the final release of Zephyr 4.2, as it has now reached EOL status: https://docs.zephyrproject.org/4.2.0/releases/index.html#supported-releases

The following issues are addressed by this release:

[#55186] posix: fnmatch: fix known bugs [#61464] USB device stack (new and old) assertion on STM32 [#84934] USB devices broken on STM32F723XX MCUs after clock enable changes [#92397] Missing fallback to a base board.dts when using a board variant without specific dts file [#93668] esp32s3: pr 91027 results in periph_rtc_dig_clk8m_get_freq() returning zero [#93943] Unable to build LVGL samples on Ubuntu 22.04 for native_sim [#93986] Unable to build LVGL with picolibc from source/module [#96841] FRDM_K64F: arch.arm.user.stack.float test fail [#97269] Improve UVC compliance and support MacOS [#97304] arch: arm: start threads on privileged stack [#97593] Flash writing is broken for some dual-bank STM32H7 variants [#98077] wifi: credentials: Unable to connect with multiple SSIDs saved [#98231] Build System: defconfig: Base defconfig not used on fully qualified oot board [#98469] drivers: bluetooth: h4: insufficient buffer for header + payload [#98668] drivers: entropy: non-stop RNG ISR firing on STM32WB09 [#98768] STM32F303 bxCAN: Last 2 bytes corrupted on TX pin, but registers are correct [#98936] net: ICMPv4 packets can be reported to ICMPv6 handlers (and vice versa) [#99369] Zephyr 4.2 release notes indicate wrong TF-M version [#99412] drivers/ethernet/eth_native_tap uses a deprecated kconfig option in 4.2 [#99682] net: lib: dns: Unpacking query name can overflow the destination buffer [#99797] MCUmgr: OS: DateTime: Millisecond parsing erroneous [#99895] npcx9m6f_evb and frdm_k64f: kernel.common.stack_protection_arm_fpu_sharing fails [#100212] No event code filterint for LVGL pointer process [#100296] west packages pip --install fails with permission error [#100754] bt test commands not working/crashing for nRF54LM20A DK board [#101236] NXP: Failed to disable random-mac-address in ethernet driver. [#102307] CI runner out of disk on backports to 4.2 [#102338] macos-13 runner used in v4.2-branch [#102393] Bluetooth: Mesh: Missing provisioning PDU length check can result in out of bound write [#102395] Bluetooth: Mesh: Invalid SegN in provisioning PDU may result in out-of-bound write [#102635] gpio: mcux: Potential infinite interrupt hang when configuring [#103029] NVS startup fails after power loss during final ATE write [#99535] Issue with STM32 Ethernet and KSZ8081 Phy [#104208] IPv4/6 fragmentation memory leak [#104248] DNS query packet length check [#104253] driver: clock_control: RCC_BDCR_LSEDRV_Pos undefined using STM32L0 [#104652] net: socketcan: length not always verified [#104748] [mcumgr] error codes of group "stat" incorrect [#104948] net: lib: socket: tls: Potential out-of-bounds write in socket_op_vtable::connect [#105374] drivers: gpio: sam: callback called when interrupt disabled