This release is an emergency release to fix a critical security vulnerability in Tor Browser.

Updates

• Update Tor Browser to 9.0.4.

  This fixes a critical vulnerability in the JavaScript JIT compiler of Firefox and Tor Browser.

  Mozilla is aware of targeted attacks in the wild abusing this vulnerability.

  This vulnerability only affects the standard security level of Tor Browser. The safer and safest security levels are not affected.

Fixed problems

• Avoid a 2-minutes delay when restarting after doing an automatic upgrade. (#17026)

For more details, read our changelog.

Known issues

None specific to this release.

See the list of long-standing issues.

Get Tails 4.2.2

To upgrade your Tails USB stick and keep your Persistent Storage

• Automatic upgrades are available from 4.2 to 4.2.2.

  Users of Tails 4.0, 4.1, and 4.1.1 have to upgrade to 4.2 first and then to 4.2.2.

• If you cannot do an automatic upgrade or if Tails fails to start after an automatic upgrade, please try to do a manual upgrade.

To install Tails on a new USB stick

Follow our installation instructions:

• Install from Windows
• Install from macOS
• Install from Linux

To download only

If you don't need installation or upgrade instructions, you can directly download Tails 4.2.2:

• For USB sticks (USB image)
• For DVDs and virtual machines (ISO image)

What's coming up?

Tails 4.3 is scheduled for February 11.

We need your help and there are many ways to contribute to Tails (donating is only one of them). Come talk to us!