{"id":"GHSA-pqpw-89w5-82v5","aliases":["RUSTSEC-2023-0087"],"url":"https://o3.security/vulnerability/GHSA-pqpw-89w5-82v5","summary":"`simd-json-derive` vulnerable to `MaybeUninit` misuse","details":"An invalid use of `MaybeUninit::uninit().assume_init()` in `simd-json-derive`'s derive macro can cause undefined behavior. The original code used `MaybeUninit` to avoid initialisation of the struct and then set the fields using `ptr::write`. The undefined behavior triggered by this misuse of `MaybeUninit` can lead to invlaid memory access and panics in binaries compiled in release mode (aka simd-json-derive prior to version 0.12 has UB and optimizes into some nonsense)\n\nThe version `0.12.0` removes this section of code, avoiding the use of MaybeUninit alltogether.\n","published":"2024-11-12T20:53:54Z","modified":"2025-10-28T06:29:25.755823Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"crates.io","name":"simd-json-derive","fixedVersion":"0.12.0"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/simd-lite/simd-json-derive/issues/67"},{"type":"PACKAGE","url":"https://github.com/simd-lite/simd-json-derive"},{"type":"WEB","url":"https://rustsec.org/advisories/RUSTSEC-2023-0087.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2025-10-28T06:29:25.755823Z"}}