CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2020-15254
Critical (9.8) in crossbeam project crossbeam. EPSS 2.7% chance of exploitation in the next 30 days. Fixed in crossbeam-channel 0.4.4.
Crossbeam is a set of tools for concurrent programming. In crossbeam-channel before version 0.4.4, the bounded channel incorrectly assumes that `Vec::from_iter` has allocated capacity that same as the number of iterator elements. `Vec::from_iter` does not actually guarantee that and may allocate extra memory. The destructor of the `bounded` channel reconstructs `Vec` from the raw pointer based on the incorrect assumes described above. This is unsound and causing deallocation with the incorrect capacity when `Vec::from_iter` has allocated different sizes with the number of iterator elements. This has been fixed in crossbeam-channel 0.4.4.
Severity
- EPSS
- 2.7% chance of exploitation in the next 30 days; higher than 85% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-401, CWE-119
- Published
- Modified
- Record from
- the NVD, synced
Affected
- crossbeam_project:crossbeam
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-m8h8-v6jh-c762 | crates.io | crossbeam-channel | >=0.4.3 <0.4.4 | 0.4.4 |
| GHSA-v5m7-53cv-f3hx | crates.io | crossbeam-channel | >=0.4.3 <0.4.4 | 0.4.4 |
| RUSTSEC-2020-0052 | crates.io | crossbeam-channel | >=0.4.3 <0.4.4 | 0.4.4 |