rust-gix-fs — security advisory

{
  "id": "af8eac95e65fee189448b213ab4c18a1a967d1069f2a52ce01c9baebc96eb986",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-44471",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-44471",
    "summary": "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.",
    "evidence": "osv:DEBIAN-CVE-2026-44471",
    "products": [
      {
        "name": {
          "value": "rust-gix-fs",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.12.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.16.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.16.1-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.21.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.22.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.22.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.24.0-1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "rust-gix-fs",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.16.1-2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "0.12.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "0.16.1-1",
            "evidence": "/affected/1/versions"
          }
        ]
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2026-44471",
      "aliases": [
        "DEBIAN-CVE-2026-44471"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "rust-gix-fs",
            "purl": "pkg:deb/debian/rust-gix-fs?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "0.12.1-1",
            "0.16.1-1",
            "0.16.1-2",
            "0.21.1-1",
            "0.22.0-1",
            "0.22.1-1",
            "0.24.0-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44471.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0.16.1-2"
                }
              ]
            }
          ],
          "package": {
            "name": "rust-gix-fs",
            "purl": "pkg:deb/debian/rust-gix-fs?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "0.12.1-1",
            "0.16.1-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44471.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-27T10:01:40.242808032Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-44471"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-44471"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-44471",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 461354,
  "published_at": "2026-05-13T22:16:46.057+00:00"
}