{
  "$type": "site.standard.document",
  "bskyPostRef": {
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  "path": "/new-release-tails-7_7_3/",
  "publishedAt": "2026-05-11T22:58:58.794Z",
  "site": "https://blog.torproject.org",
  "tags": [
    "Dirty Frag",
    "15.0.12",
    "140.10.1",
    "changelog",
    "manual upgrade",
    "installation instructions",
    "For USB sticks (USB image)",
    "For DVDs and virtual machines (ISO image)",
    "Support\nsection",
    "tails",
    "releases"
  ],
  "textContent": "This release is an emergency release to fix a critical security vulnerability in the Linux kernel, as well as security vulnerabilities in _Tor Browser_ and in the _Tor_ client.\n\n## Changes and updates\n\n  * Update the _Linux_ kernel to 6.12.86, which fixes Dirty Frag, a vulnerability that could allow an application in Tails to gain administration privileges.\n\nFor example, if an attacker was able to exploit other unknown security vulnerabilities in an application included in Tails, they might then use Copy Fail to take full control of your Tails and deanonymize you.\n\nWe are not aware of this vulnerability being used in practice until now.\n\n  * Update _Tor Browser_ to 15.0.12.\n\n  * Update the _Tor_ client to 0.4.9.8.\n\n  * Update _Thunderbird_ to 140.10.1.\n\n\n\n\n## Fixed problems\n\nFor more details, read our changelog.\n\n## Get Tails 7.7.3\n\n### To upgrade your Tails USB stick and keep your Persistent Storage\n\n  * Automatic upgrades are available from Tails 7.0 or later to 7.7.3.\n\n  * If you cannot do an automatic upgrade or if Tails fails to start after an automatic upgrade, please try to do a manual upgrade.\n\n\n\n\n### To install Tails 7.7.3 on a new USB stick\n\nFollow our installation instructions.\n\nThe Persistent Storage on the USB stick will be lost if you install instead of upgrading.\n\n### To download only\n\nIf you don't need installation or upgrade instructions, you can download Tails 7.7.3 directly:\n\n  * For USB sticks (USB image)\n\n  * For DVDs and virtual machines (ISO image)\n\n\n\n\n## Support and feedback\n\nFor support and feedback, visit the Support\nsection on the Tails website.\n\n  * \n          tails\n        \n  * \n          releases\n        \n\n",
  "title": "New Release: Tails 7.7.3",
  "updatedAt": "2026-05-12T00:00:00.000Z"
}