https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-04T15:15:38.158399+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2020-35905 CVE-2020-35905 2026-10-04T15:15:38.160901+00:00

An issue was discovered in the futures-util crate before 0.3.7 for Rust. MutexGuard::map can cause a data race for certain closure situations (in safe code).

 https://cve.radiocsirt.org/vuln/ghsa-rh4w-94hh-9943 GHSA-rh4w-94hh-9943 — MutexGuard::map can cause a data race in safe code 2026-10-04T15:15:38.160946+00:00

Affected: crates.io: futures-util

Affected versions of the crate had a Send/Sync implementation for MappedMutexGuard that only considered variance on T, while MappedMutexGuard dereferenced to U.

This could of led to data races in safe Rust code when a closure used in MutexGuard::map() returns U that is unrelated to T.

The issue was fixed by fixing Send and Sync implementations, and by adding a PhantomData<&'a mut U> marker to the MappedMutexGuard type to tell the compiler that the guard is over U too.