# CVE-2020-15254: RUSTSEC-2020-0052 - Undefined Behavior in bounded channel

Source: https://junglewise.ai/threats/cve-2020-15254-incorrect-buffer-size-in-crossbeam-channel  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2020-06-26  
License: CC BY 4.0 with a link back

CVE-2020-15254 · Severity: low · CVSS 3.1 · Published 2020-06-26

Undefined Behavior in bounded channel

Technologies: [crossbeam-channel (crates.io)](https://junglewise.ai/threats/technologies/crossbeam-channel). Vendors: [crates.io](https://junglewise.ai/threats/vendors/crates-io).

## Quick answers

**Is CVE-2020-15254 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2020-15254 being exploited in the wild.

**How severe is CVE-2020-15254?** Low severity, with a CVSS score of 3.1, published 26 June 2020.

**Which products and versions are affected?** crossbeam-channel (crates.io) SEMVER:introduced=0.4.3,fixed=0.4.4.

**Is there a fix for CVE-2020-15254?** Yes. crossbeam-channel (crates.io): upgrade to 0.4.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2020-15254?** Check whether you run crossbeam-channel (crates.io) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- crossbeam-channel (crates.io): upgrade to 0.4.4 or later

  ```sh
  cargo update -p crossbeam-channel
  ```


## Affected products

- crossbeam-channel (crates.io) SEMVER:introduced=0.4.3,fixed=0.4.4

## Identifiers

- CVE-2020-15254
- CVE-2020-35904
- GHSA-m8h8-v6jh-c762
- GHSA-v5m7-53cv-f3hx
- RUSTSEC-2020-0052

## Related threats

- [Duplicate Advisory: crossbeam-channel Vulnerable to Double Free on Drop](https://junglewise.ai/threats/duplicate-advisory-crossbeam-channel-vulnerable-to-double-free-on-drop-006556f8)
- [RUSTSEC-2025-0024 - crossbeam-channel: double free on Drop](https://junglewise.ai/threats/cve-2025-4574-crossbeam-channel-vulnerable-to-double-free-on-drop)
- [Channel creates zero value of any type](https://junglewise.ai/threats/channel-creates-zero-value-of-any-type-7815a788)
- [RUSTSEC-2022-0019 - Channel creates zero value of any type](https://junglewise.ai/threats/rustsec-2022-0019-channel-creates-zero-value-of-any-type-97a29f80)