# [Tails 7.4.2](
https://tails.net/news/version_7.4.2/)
This release is an emergency release to fix critical security vulnerabilities
in the _Linux_ kernel.
# Changes and updates
* Update the _Linux_ kernel to 6.12.69, which fixes [DSA 6126-1](
https://lists.debian.org/debian-security-announce/2026/msg00035.html), multiple security vulnerabilities that could allow an application in Tails to gain administration privileges.
For example, if an attacker was able to exploit other unknown security
vulnerabilities in an application included in Tails, they might then use DSA
6126-1 to take full control of your Tails and deanonymize you.
This attack is very unlikely, but could be performed by a strong attacker,
such as a government or a hacking firm. We are not aware of this attack being
used in practice.
* Update _Thunderbird_ to [140.7.1](
https://www.thunderbird.net/en-US/thunderbird/140.7.1esr/releasenotes/).
# Fixed problems
* Fix opening the Wi-Fi settings from the _Tor Connection_ assistant. ([#18587](
https://gitlab.tails.boum.org/tails/tails/-/issues/18587))
* Fix reopening _Electrum_ when it was not closed cleanly. ([#21390](
https://gitlab.tails.boum.org/tails/tails/-/issues/21390))
* Fix applying the language saved to the USB stick in the Welcome Screen. ([#21383](
https://gitlab.tails.boum.org/tails/tails/-/issues/21383))
For more details, read our
[changelog](
https://gitlab.tails.boum.org/tails/tails/-/blob/master/debian/changelog).
# Get Tails 7.4.2
## To upgrade your Tails USB stick and keep your Persistent Storage
* Automatic upgrades are available from Tails 7.0 or later to 7.4.2.
* If you cannot do an automatic upgrade or if Tails fails to start after an automatic upgrade, please try to do a [manual upgrade](
https://tails.net/doc/upgrade/index.en.html#manual).
## To install Tails 7.4.2 on a new USB stick
Follow our installation instructions:
* [Install from Windows](
https://tails.net/install/windows/index.en.html)
* [Install from macOS](
https://tails.net/install/mac/index.en.html)
* [Install from Linux](
https://tails.net/install/linux/index.en.html)
* [Install from Debian or Ubuntu using the command line and GnuPG](
https://tails.net/install/expert/index.en.html)
The Persistent Storage on the USB stick will be lost if you install instead of
upgrading.
## To download only
If you don't need installation or upgrade instructions, you can download Tails
7.4.2 directly:
* [For USB sticks (USB image)](
https://tails.net/install/download/index.en.html)
* [For DVDs and virtual machines (ISO image)](
https://tails.net/install/download-iso/index.en.html)
URL: <
https://tails.net/news/version_7.4.2/>
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