Tails 6.15.1
This release is an emergency release to fix important security vulnerabilities in Tor Browser.
Changes and updates
Update Tor Browser to 14.5.2, which fixes Mozilla Foundation Security Advisory 2025-37. 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.
Update Thunderbird to 128.10.1.
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. ( #15028)
Fixed problems
Fix the Unsafe Browser appearing in the window list with the Tor Browser icon. ( #20934)
Make reporting an error using WhisperBack more robust. ( #20921)
Fix USB tethering. ( #20940)
For more details, read our changelog.
Tails 6.15.1 is a critical update aimed at resolving security vulnerabilities in the Tor Browser. The updates encompass Tor Browser 14.5.2, Thunderbird 128.10.1, and the elimination of Tor Browser and Tor Browser folders. Additional improvements encompass addressing Unsafe Browser concerns, enhancing the robustness of WhisperBack error reporting, and rectifying USB tethering issues.
