{"id":"UBUNTU-CVE-2026-44471","details":"gitoxide is an implementation of git written in Rust. Prior to 0.21.1, a malicious tree can be constructed that will, when checked out with gitoxide, permit writing an attacker-controlled symlink into any existing directory the user has write access to. During checkout, all symlink index entries are deferred and created after regular files using a single shared gix_worktree::Stack. Internally, this uses a gix_fs::Stack. gix_fs::Stack::make_relative_path_current() caches validated path prefixes: when the previously-processed leaf component exactly matches the leading component(s) of the next path, the leaf-to-directory transition at gix-fs/src/stack.rs invokes only delegate.push_directory(), never delegate.push(). In gix_worktree::stack::delegate::StackDelegate, when the state member is State::CreateDirectoryAndAttributesStack, Attributes::push_directory() only loads attributes (from the ODB, in the clone case), and does not perform any other checks. The on-disk symlink_metadata() check and unlink-on-collision live in StackDelegate::push()'s invocation of create_leading_directory(), which is therefore bypassed for the cached prefix. The final symlink is created with plain std::os::unix::fs::symlink, which follows symlinks in parent directories. Therefore, it's possible to provide a tree with duplicate symlink and directory entries that exploits this. This vulnerability is fixed in 0.21.1.","modified":"2026-05-20T22:03:08.354296341Z","published":"2026-05-13T22:16:00Z","upstream":["CVE-2026-44471"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-44471"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-44471"},{"type":"REPORT","url":"https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-f89h-2fjh-2r9q"}],"affected":[{"package":{"name":"rust-gix-fs","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/rust-gix-fs?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.8.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-gix-fs-dev","binary_version":"0.8.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44471.json"}},{"package":{"name":"rust-gix-fs","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/rust-gix-fs?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.1-1"],"ecosystem_specific":{"binaries":[{"binary_name":"librust-gix-fs-dev","binary_version":"0.12.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44471.json"}},{"package":{"name":"rust-gix-fs","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/rust-gix-fs?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.1-1","0.16.1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.16.1-1","binary_name":"librust-gix-fs-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44471.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}