Exit Zen
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[[!meta title="Tails 6.15.1"]]
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[[!meta date="Tue, 20 May 2025 00:00:00 +0000"]]
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[[!pagetemplate template="news.tmpl"]]
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[[!tag announce]]
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This release is an emergency release to fix important security vulnerabilities in Tor Browser.
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<h1 id="changes">Changes and updates</h1>
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Update *Tor Browser* to [14.5.2](https://blog.torproject.org/new-release-tor-browser-1452), which fixes [Mozilla Foundation Security Advisory 2025-37](https://www.mozilla.org/en-US/security/advisories/mfsa2025-37/). These vulnerabilities allow an attacker to perform an out-of-bounds read or write on a JavaScript object, but [don't allow breaking out of the Firefox sandbox](https://blog.mozilla.org/security/2025/05/17/firefox-security-response-to-pwn2own-2025/).
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- Update *Thunderbird* to [128.10.1](https://www.thunderbird.net/en-US/thunderbird/128.10.1esr/releasenotes/).
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Remove the *Tor Browser* and *Tor Browser (persistent)* folders: they are not necessary anymore, thanks to the more flexible confinement of *Tor Browser* we introduced in [[Tails 6.14.1|news/version_6.14.1]]. ([[!tails_ticket 15028]])
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<h1 id="fixes">Fixed problems</h1>
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Fix the *Unsafe Browser* appearing in the window list with the *Tor Browser* icon. ([[!tails_ticket 20934]])
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Make reporting an error using *WhisperBack* more robust. ([[!tails_ticket 20921]])
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- Fix *USB tethering*. ([[!tails_ticket 20940]])
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For more details, read our [[!tails_gitweb debian/changelog desc="changelog"]].
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<h1 id="get">Get Tails 6.15.1</h1>
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To upgrade your Tails USB stick and keep your Persistent Storage
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- Automatic upgrades are available from Tails 6.0 or later to 6.15.1.
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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 6.15.1 on a new USB stick
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Follow our installation instructions:
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