🔒 This is a security release to provide compatibility with git's changes to address [CVE 2022-24765](https://github.blog/2022-04-12-git-security-vulnerability-announced/).
**libgit2 is not directly affected** by this vulnerability, because libgit2 does not directly invoke any executable. But we are providing these changes as a security release for any users that use libgit2 for repository discovery and then _also_ use git on that repository. In this release, we will now validate that the user opening the repository is the same user that owns the on-disk repository. This is to match git's behavior.
In addition, we are providing several correctness fixes where invalid input can lead to a crash. These may prevent possible denial of service attacks. At this time there are not known exploits to these issues.
Full list of changes:
* Validate repository directory ownership (v1.4) by @ethomson in https://github.com/libgit2/libgit2/pull/6267
* midx: Fix an undefined behavior (left-shift signed overflow) by @lhchavez in https://github.com/libgit2/libgit2/pull/6260
* fetch: support OID refspec without dst by @ethomson in https://github.com/libgit2/libgit2/pull/6251
* Fix crash when regenerating a patch with unquoted spaces in filename by @jorio in https://github.com/libgit2/libgit2/pull/6244
All users of the v1.4 release line are recommended to upgrade.
