{"id":"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","aliases":["RUSTSEC-2023-0087"],"modified":"2025-10-28T06:29:25.755823Z","published":"2024-11-12T20:53:54Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2024-11-12T20:53:54Z","nvd_published_at":null,"cwe_ids":[]},"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"}],"affected":[{"package":{"name":"simd-json-derive","ecosystem":"crates.io","purl":"pkg:cargo/simd-json-derive"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.12.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/11/GHSA-pqpw-89w5-82v5/GHSA-pqpw-89w5-82v5.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U"}]}