RUSTSEC-2023-0087

    Dashboard / Vulnerabilities / RUSTSEC-2023-0087

    RUSTSEC-2023-0087

    Published: 14 Oct 2023Last Modified: 28 Oct 2025

    Summary: `MaybeUninit` misuse in `simd-json-derive`

    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) The `0.12.0` removes this section of code, avoiding the use of MaybeUninit alltogether.

    References: https://crates.io/crates/simd-json-derive, https://rustsec.org/advisories/RUSTSEC-2023-0087.html, https://github.com/simd-lite/simd-json-derive/issues/67

    Affected packages

    Package

    Name: simd-json-derive

    Purl: pkg:cargo/simd-json-derive

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0.0.0-0
    Fixed -0.12.0

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    RUSTSEC-2023-0087 | CVE-DB