CVE-2021-32810

crossbeam-deque is a package of work-stealing deques for building task
schedulers when programming in Rust. In versions prior to 0.7.4 and 0.8.0,
the result of the race condition is that one or more tasks in the worker
queue can be popped twice instead of other tasks that are forgotten and
never popped. If tasks are allocated on the heap, this can cause double
free and a memory leak. If not, this still can cause a logical bug. Crates
using Stealer::steal, Stealer::steal_batch, or
Stealer::steal_batch_and_pop are affected by this issue. This has been
fixed in crossbeam-deque 0.8.1 and 0.7.4.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993146&gt;