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cnvd-2021-39556

An issue was discovered in the pyo3 crate before 0.12.4 for Rust. There is a reference-counting error and use-after-free in From<Py<T>>.

Affected: crates.io: pyo3

An issue was discovered in the pyo3 crate before 0.12.4 for Rust. There is a reference-counting error and use-after-free in From<Py<T>>.

Affected: crates.io: pyo3

A bug in `From<Py<T>>` would lead to an extra reference count decrement, often leading to use-after-free issues.