OpenWrt 21.02.4 - Service Release - 12 October 2022

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 OpenWrt 21.02.4, r16685-82ebc173b3
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The OpenWrt community is proud to announce the newest stable release of the OpenWrt 21.02 stable version series. It fixes security issues, improves device support, and brings a few bug fixes.

Download firmware images via the Firmware Selector or directly from our download servers:

• Download firmware image for your device (firmware selector)
• Download firmware images directly from OpenWrt download servers

An upgrade from OpenWrt 19.07 or 22.02 to OpenWrt 21.02.4 is supported in many cases with the help of the sysupgrade utility which will also attempt to preserve the configuration. A configuration backup is advised nonetheless when upgrading to OpenWrt 21.02. (see “Upgrading” below).

The OpenWrt 21.02 stable series is in security maintenance only mode. It is projected to go end of life on 6. April 2023 following the OpenWrt Security support guidelines. We encourage all users of the OpenWrt 21.02 stable series to upgrade to OpenWrt 22.03.

The OpenWrt project is a Linux operating system targeting embedded devices. It is a complete replacement for the vendor-supplied firmware of a wide range of wireless routers and non-network devices. See the Table of Hardware for supported devices. For more information about OpenWrt project organization, see the About OpenWrt pages.

Do you want to be informed about important changes such as new releases and security fixes?

We have a new mailing list for this, as well as RSS options: see Important changes and announcements.

Only the main changes are listed below. See changelog-21.02.4 for the full changelog.

• wolfssl: Fix security problem (CVE-2022-34293, CVE-2022-38152, CVE-2022-38153 and CVE-2022-39173)
  • See Security Advisory 2022-10-04-1
• zlib: Fix security problem (CVE-2022-37434)
• openssl: Fix security problem (CVE-2022-1292, CVE-2022-2068 and CVE-2022-2097)

• Support for the following devices was added:
  • Wavlink WL-WN579X3
  • Sitecom WLR-4100 v1 002
  • Banana Pi M2 Berry
  • YunCore AX820/HWAP-AX820
  • MikroTik RouterBOARD hAP ac lite
  • MikroTik RouterBOARD mAP
• Youku YK1: speed up spi frequency for YK-L1, split YK1 to YK-L1 and YK-L1c
• ZBTLink ZBT-WG2626: add reset GPIO for PCIe port 1
• ZBTLink ZBT-WE1026 5G: fix watchdog reset
• Asus RT-AC57U: fix WPS button level
• Archer VR2600: fix switch ports numbering
• ZyXEL NBG-419N v2: Fix booting
• Linksys MR8300: add WAN port
• ramips: several fixes and improvements to mt7620 Ethernet
• bcm53xx:
  • Disable GRO by default at kernel level
  • Enable & setup packet steering
• ipq40xx: fix ar40xx driver
• bcm4908:
  • Enable NVMEM U-Boot env data driver
  • Backport mtd parser for Broadcom's U-Boot partition
  • fix -EPROBE_DEFER support in bcm4908_enet

• kernel:
  • Fix IPv6 flow offloading (FS#3373)
  • Backport LEDs driver for BCMBCA devices
  • Backport mtd dynamic partition patch
  • Fix possible mtd NULL pointer dereference
• mac80211: fix QCA9561 PA bias
• mac80211: disable ft-over-ds by default
• mt76: backport fix encap offload ethernet type check
• hostapd fixes and improvements:
  • Add support for enabling link measurements
  • Fix uninitialized pointer
• zlib: backport null dereference fix
• build system:
  • Switch from xxd tool to xxdi.pl script
  • Check TLS certificates by default when downloading over HTTPS
  • feeds: use git-src-full to allow Git versioning
  • Fix build warnings with grep-3.8
  • Add compatibility with Python 3.11

• Update Linux kernel from 5.4.188 to 5.4.215
• Update openssl from 1.1.1n to 1.1.1q
• Update wolfssl from 5.2.0 to 5.5.1
• Update wireless-regdb from 2021.08.28 to 2022.08.12
• Update intel-microcode from 20210608 to 20220809
• Update exfat from 5.12.3 to 5.19.1
• Update iwinfo from 2021-04-30 to 2022-04-26

Upgrading from OpenWrt 21.02 is straightforward thanks to the sysupgrade utility: sysupgrade from web interface or sysupgrade from command-line.

An upgrade from OpenWrt 19.07 to OpenWrt 21.02 is supported in many cases, including preserving configuration. A configuration backup is advised nonetheless when upgrading from OpenWrt 19.07.

None so far.

See reporting bugs if you encounter issues with this release.