New stable release: Tor 0.4.6.6

We have a new stable release today. If you build Tor from source, you can download the source...
We have a new stable release today. If you build Tor from source, you can download the source...
After months of work, we have a new stable release series! If you build Tor from source, you can download the source code for 0.4.6.5 on the download page. Packages should be available within the next several weeks, with a new Tor Browser around the end of the week.
Because this release includes security fixes, we are also releasing updates for our other supported releases. You can find their source at https://dist.torproject.org:
Tor 0.4.6.5 is the first stable release in its series. The 0.4.6.x series includes numerous features and bugfixes, including a significant improvement to our circuit timeout algorithm that should improve observed client performance, and a way for relays to report when they are overloaded.
This release also includes security fixes for several security issues, including a denial-of-service attack against onion service clients, and another denial-of-service attack against relays. Everybody should upgrade to one of 0.3.5.15, 0.4.4.9, 0.4.5.9, or 0.4.6.5.
Below are the changes since 0.4.5.8. For a list of changes since 0.4.6.4-rc, see the ChangeLog file.
There's a new release candidate available for download. If you build Tor from source, you can download the source code for 0.4.6.4-rc from the download page on the website. Packages should be available over the coming weeks, with a new alpha Tor Browser release likely next week.
Remember, this is a not a stable release yet: but we still hope that people will try it out and look for bugs before the official stable release comes out in June.
Tor 0.4.6.4-rc fixes a few bugs from previous releases. This, we hope, the final release candidate in its series: unless major new issues are found, the next release will be stable.
There's a new release candidate available for download. If you build Tor from source, you can download the source code for Tor 0.4.6.3-rc from the download page on the website. Packages should be available over the coming weeks, with a new Tor Browser release likely next week.
Tor 0.4.6.3-rc is the first release candidate in its series. It fixes a few small bugs from previous versions, and adds a better error message when trying to use (no longer supported) v2 onion services.
Though we anticipate that we'll be doing a bit more clean-up between now and the stable release, we expect that our remaining changes will be fairly simple. There will likely be at least one more release candidate before 0.4.6.x is stable.
We have a new stable release today. If you build Tor from source, you can download the source code for Tor 0.4.5.8 on the download page. Packages should be available within the next several weeks, with a new Tor Browser likely next week.
Tor 0.4.5.8 fixes several bugs in earlier version, backporting fixes from the 0.4.6.x series.
There's a new alpha release available for download. If you build Tor from source, you can download the source code for 0.4.6.2-alpha from the download page on the website. Packages should be available over the coming weeks, with a new alpha Tor Browser release likely some time next week.
Remember, this is an alpha release: you should only run this if you'd like to find and report more bugs than usual.
Tor 0.4.6.2-alpha is the second alpha in its series. It fixes several small bugs in previous releases, and solves other issues that had enabled denial-of-service attacks and affected integration with other tools.
There's a new alpha release available for download. If you build Tor from source, you can download the source code for 0.4.6.1-alpha from the download page on the website. Packages should be available over the coming weeks, with a new alpha Tor Browser release likely next week.
Remember, this is an alpha release: you should only run this if you'd like to find and report more bugs than usual.
Tor 0.4.6.1-alpha is the first alpha release in the 0.4.6.x series. It improves client circuit performance, adds missing features, and improves some of our DoS handling and statistics reporting. It also includes numerous smaller bugfixes.
Below are the changes since 0.4.5.7. (Note that this release DOES include the fixes for the security bugs already fixed in 0.4.5.7.)
After months of work, we have a new stable release series! If you build Tor from source, you can download the source code for 0.4.5.6 on the download page. Packages should be available within the next several weeks, with a new Tor Browser likely next week.
The Tor 0.4.5.x release series is dedicated to the memory of Karsten Loesing (1979-2020), Tor developer, cypherpunk, husband, and father. Karsten is best known for creating the Tor metrics portal and leading the metrics team, but he was involved in Tor from the early days. For example, while he was still a student he invented and implemented the v2 onion service directory design, and he also served as an ambassador to the many German researchers working in the anonymity field. We loved him and respected him for his patience, his consistency, and his welcoming approach to growing our community.
This release series introduces significant improvements in relay IPv6 address discovery, a new "MetricsPort" mechanism for relay operators to measure performance, LTTng support, build system improvements to help when using Tor as a static library, and significant bugfixes related to Windows relay performance. It also includes numerous smaller features and bugfixes.
Below are the changes since 0.4.4.7. For a list of changes since 0.4.5.5-rc, see the ChangeLog file.
We have a new stable release today. If you build Tor from source, you can download the source code for 0.4.4.7 on the download page. Packages should be available within the next several weeks, with a new Tor Browser later this month.
We're also releasing updates for older stable release series. You can download 0.3.5.13 (changelog) and 0.4.3.8 (changelog) from dist.torproject.org. Note that the 0.4.3.x series will no longer be supported after 15 February.
Tor 0.4.4.7 backports numerous bugfixes from later releases, including one that made v3 onion services more susceptible to denial-of-service attacks, and a feature that makes some kinds of DoS attacks harder to perform.
There's a new release candidate available for download. If you build Tor from source, you can download the source code for 0.4.5.4-rc from the download page on the website. Packages should be available over the coming weeks, with a new alpha Tor Browser release likely around this coming Tuesday.
Tor 0.4.5.4-rc is the second release candidate in its series. It fixes several bugs present in previous releases.
We expect that the stable release will be the same, or almost the same, as this release candidate, unless serious bugs are found.