# CVE-2020-25791: RUSTSEC-2020-0041 - Multiple soundness issues in Chunk and InlineArray

Source: https://junglewise.ai/threats/cve-2020-25791-array-size-is-not-checked-in-sized-chunks  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2020-09-06  
License: CC BY 4.0 with a link back

CVE-2020-25791 · Severity: low · CVSS 3.1 · Published 2020-09-06

Multiple soundness issues in Chunk and InlineArray

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

## Quick answers

**Is CVE-2020-25791 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2020-25791 being exploited in the wild.

**How severe is CVE-2020-25791?** Low severity, with a CVSS score of 3.1, published 6 September 2020.

**Which products and versions are affected?** sized-chunks (crates.io) SEMVER:introduced=0,fixed=0.6.3, SEMVER:introduced=0.0.0-0,fixed=0.6.3.

**Is there a fix for CVE-2020-25791?** Yes. sized-chunks (crates.io): upgrade to 0.6.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2020-25791?** Check whether you run sized-chunks (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

- sized-chunks (crates.io): upgrade to 0.6.3 or later

  ```sh
  cargo update -p sized-chunks
  ```


## Affected products

- sized-chunks (crates.io) SEMVER:introduced=0,fixed=0.6.3, SEMVER:introduced=0.0.0-0,fixed=0.6.3

## Identifiers

- CVE-2020-25791
- CVE-2020-25796
- CVE-2020-25795
- CVE-2020-25793
- CVE-2020-25792
- CVE-2020-25794
- GHSA-64gv-qg2v-vxv6
- GHSA-9p9m-9xww-qjcx
- GHSA-fqpx-cq8x-9wp4
- GHSA-mp6f-p9gp-vpj9
- GHSA-rfgg-vccr-m46m
- GHSA-x54v-qxxr-93qc
- RUSTSEC-2020-0041

## Related threats

- [RUSTSEC-2026-0255 - Panic-safety unsoundness in `Chunk`, `RingBuffer`, and `InlineArray` (use-after-free / double-free)](https://junglewise.ai/threats/rustsec-2026-0255-panic-safety-unsoundness-in-chunk-ringbuffer-and-0da04c57)
- [RUSTSEC-2026-0251 - sized-chunks is unmaintained](https://junglewise.ai/threats/rustsec-2026-0251-sized-chunks-is-unmaintained-9422aba5)