An issue was discovered in the beef crate before 0.5.0 for Rust.
Affected versions of this crate did not have a T: Sync bound in the Send impl for Cow<'_, T, U>. This allows users to create data races by making Cow contain types that are (Send && !Sync) like Cell<_> or RefCell<_>.
Such data races can lead to memory corruption.
The flaw was corrected in commit d1c7658 by adding trait bounds T: Sync and T::Owned: Send to the Send impl for Cow<'_, T, U>.
{
"nvd_published_at": "2021-08-08T06:15:00Z",
"severity": "HIGH",
"cwe_ids": [
"CWE-119",
"CWE-362"
],
"github_reviewed": true,
"github_reviewed_at": "2021-08-09T21:50:28Z"
}