{"id":"GHSA-4v52-7q2x-v4xj","aliases":["RUSTSEC-2024-0021"],"url":"https://o3.security/vulnerability/GHSA-4v52-7q2x-v4xj","summary":"eyre: Parts of Report are dropped as the wrong type during downcast","details":"In affected versions, after a `Report` is constructed using `wrap_err` or `wrap_err_with` to attach a message of type `D` onto an error of type `E`, then using `downcast` to recover ownership of either the value of type `D` or the value of type `E`, one of two things can go wrong:\n\n- If downcasting to `E`, there remains a value of type `D` to be dropped. It is incorrectly \"dropped\" by running `E`'s drop behavior, rather than `D`'s. For example if `D` is `&str` and `E` is `std::io::Error`, there would be a call of `std::io::Error::drop` in which the reference received by the `Drop` impl does not refer to a valid value of type `std::io::Error`, but instead to `&str`.\n\n- If downcasting to `D`, there remains a value of type `E` to be dropped. When `D` and `E` do not happen to be the same size, `E`'s drop behavior is incorrectly executed in the wrong location. The reference received by the `Drop` impl may point left or right of the real `E` value that is meant to be getting dropped.\n\nIn both cases, when the `Report` contains an error `E` that has nontrivial drop behavior, the most likely outcome is memory corruption.\n\nWhen the `Report` contains an error `E` that has trivial drop behavior (for example a `Utf8Error`) but where `D` has nontrivial drop behavior (such as `String`), the most likely outcome is that downcasting to `E` would leak `D`.","published":"2024-04-05T15:08:53Z","modified":"2026-09-10T03:50:11.168374946Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"eyre","fixedVersion":"0.6.12"}],"fix":{"url":"https://github.com/eyre-rs/eyre/commit/770ac3fa1435eae3b166a4b072053360e38a0575","label":"eyre-rs/eyre@770ac3f"},"references":[{"type":"WEB","url":"https://github.com/eyre-rs/eyre/issues/141"},{"type":"WEB","url":"https://github.com/eyre-rs/eyre/commit/770ac3fa1435eae3b166a4b072053360e38a0575"},{"type":"PACKAGE","url":"https://github.com/eyre-rs/eyre"},{"type":"WEB","url":"https://rustsec.org/advisories/RUSTSEC-2024-0021.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-10T03:50:11.168374946Z"}}