OpenWrt 21.02.7 - Service Release - 1 May 2023

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 OpenWrt 21.02.7, r16847-f8282da11e

The OpenWrt community is proud to announce the newest stable release of the OpenWrt 21.02 stable version series. It fixes security issues and brings a bug fix.

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

An upgrade from OpenWrt 19.07 or 21.02 to OpenWrt 21.02.7 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 now end of life following the OpenWrt Security support guidelines. We encourage all users of the OpenWrt 21.02 stable series to upgrade to OpenWrt 22.03. We will not fix any security problems, even severe ones in the OpenWrt 21.02 release branch any more.

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-21.02.7 for the full changelog.

  • CVE-2023-0464: openssl: Excessive Resource Usage Verifying X.509 Policy Constraints
  • CVE-2023-0465: openssl: Invalid certificate policies in leaf certificates are silently ignored
  • None
  • Fix UBI (Unsorted Block Images) bug which prevented some devices from booting
  • Update uclient from 2021-05-14 to 2023-04-13

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.

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  • Last modified: 2023/05/01 21:35
  • by hauke