PyO3 has a missing `Sync` bound on `PyCFunction::new_closure` closures

PyCFunction::newclosure and the temporary newclosurebound complement in the 0.21–0.22 series required the supplied closure to be Send + 'static but not Sync. The resulting PyCFunction is a Python callable that can be invoked from any Python thread, which means the closure may be called concurrent...

GHSA-CHGR-C6PX-7XPP PyO3 has a missing `Sync` bound on `PyCFunction::new_closure` closures

PyCFunction::newclosure and the temporary newclosurebound complement in the 0.21–0.22 series required the supplied closure to be Send + 'static but not Sync. The resulting PyCFunction is a Python callable that can be invoked from any Python thread, which means the closure may be called concurrent...

RUSTSEC-2026-0177 Missing `Sync` bound on `PyCFunction::new_closure` closures

PyCFunction::newclosure and the temporary newclosurebound complement in the 0.21–0.22 series required the supplied closure to be Send + 'static but not Sync. The resulting PyCFunction is a Python callable that can be invoked from any Python thread, which means the closure may be called concurrent...

EUVD-2021-1792

Malware in sbrugna...

CVE-2020-36442

An issue was discovered in the beef crate before 0.5.0 for Rust. beef::Cow has no Sync bound on its Send trait...

GHSA-4HJG-CX88-G9F9 Data races in futures-intrusive

GenericMutexGuard was given the Sync auto trait as long as T is Send due to its contained members. However, since the guard is supposed to represent an acquired lock and allows concurrent access to the underlying data from different threads, it should only be Sync when the underlying data is. Thi...

Data race in abox

Affected versions of this crate implements Send/Sync for AtomicBox without requiring T: Send/T: Sync. This allows to create data races to T: !Sync and send T: !Send to another thread. Such behavior breaks the compile-time thread safety guarantees of Rust, and allows users to incur undefined...

CVE-2020-36442

An issue was discovered in the beef crate before 0.5.0 for Rust. beef::Cow has no Sync bound on its Send trait...

CVE-2020-36442

An issue was discovered in the beef crate before 0.5.0 for Rust. beef::Cow has no Sync bound on its Send trait...

CVE-2020-36215

An issue was discovered in the hashconsing crate before 1.1.0 for Rust. Because HConsed does not have bounds on its Send trait or Sync trait, memory corruption can occur...

CVE-2020-36217

An issue was discovered in the mayqueue crate through 2020-11-10 for Rust. Because Queue does not have bounds on its Send trait or Sync trait, memory corruption can occur...

CVE-2020-36204

An issue was discovered in the im crate through 2020-11-09 for Rust. Because TreeFocus does not have bounds on its Send trait or Sync trait, a data race can occur...