GHSA-655h-hg88-5qmf: Rust XCB `xcb::Connection::connect_to_fd*` functions violate I/O safety
The API of xcb::Connection has constructors which allow an arbitrary RawFd to be used as a socket connection. On either failure of these constructors or on the drop of Connection, it closes the associated file descriptor. Thus, a program which uses an OwnedFd (such as a UnixStream) as the file descriptor can close the file descriptor and continue to attempt using it or close an already-closed file descriptor, violating I/O safety.
Starting in version 1.6.0, xcb provides Connection::connect_with_fd and Connection::connect_with_fd_and_extensions as safe alternatives and deprecates the problematic functions.
References
- github.com/advisories/GHSA-655h-hg88-5qmf
- github.com/rust-x-bindings/rust-xcb
- github.com/rust-x-bindings/rust-xcb/commit/da830976870c1174e3b33eb0643177be3991c002
- github.com/rust-x-bindings/rust-xcb/issues/167
- github.com/rust-x-bindings/rust-xcb/issues/282
- github.com/rust-x-bindings/rust-xcb/pull/283
- github.com/rustsec/advisory-db/pull/2355
- rustsec.org/advisories/RUSTSEC-2025-0051.html
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