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[[!meta title="Tails 4.2.2 is out"]]
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This release is an emergency release to fix a critical security vulnerability in *Tor Browser*.
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Updates
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Update *Tor Browser* to [9.0.4](https://blog.torproject.org/new-release-tor-browser-904).
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This fixes a [[!mfsa 2020-03 desc="critical vulnerability"]]
in the JavaScript JIT compiler of *Firefox* and *Tor Browser*.
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Mozilla is aware of targeted attacks in the wild abusing this
vulnerability.
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This vulnerability only affects the *standard* [[security
level|doc/anonymous_internet/Tor_Browser#security-level]] of *Tor
Browser*. The *safer* and *safest* security levels are not affected.
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Fixed problems
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Avoid a 2-minutes delay when restarting after doing an automatic upgrade. ([[!tails_ticket 17026]])
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For more details, read our [[!tails_gitweb debian/changelog desc="changelog"]].
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Known issues
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None specific to this release.
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See the list of [[long-standing issues|support/known_issues]].
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Get Tails 4.2.2
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To upgrade your Tails USB stick and keep your persistent storage
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- Automatic upgrades are available from 4.2 to 4.2.2.
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Users of Tails 4.0, 4.1, and 4.1.1 have to upgrade to 4.2 first and
then to 4.2.2.
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If you cannot do an automatic upgrade or if Tails fails to start after an automatic upgrade, please try to do a [[manual upgrade|doc/upgrade/#manual]].
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To install Tails on a new USB stick
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Follow our installation instructions:
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