Affected versions of this crate did not guard against panic within the user-provided function f (2nd parameter of fn maparray), and thus panic within f causes double drop of a single object.
The flaw was corrected in the 0.4.0 release by wrapping the object vulnerable to a double drop within ManuallyDrop.
// cvss v3.1 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Checked 2026-09-28 at 19:47 UTC. The most recent advisory here was published 2021-08-25. Updated continuously from NVD, GHSA, OSV and CNA feeds.