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CVE-2020-25794

25
FAUCET Score

CVE-2020-25794 describes a memory-safety issue within the Chunk implementation of the sized-chunks Rust crate, affecting versions up to 0.6.2. Specifically, a panic during a clone operation can lead to memory corruption. This vulnerability carries a CVSS score of 7.5 (High), indicating a high impact on availability (A:H) with low attack complexity (AC:L) and no user interaction required (UI:N). There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.6.2CPE matchmatch criteria
cpe:2.3:a:sized-chunks_project:sized-chunks:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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 Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.73%
Probability of exploitation in next 30 days
EPSS Percentile
75.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0173 is in the 58th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 19064-16820Fixed in: 1.47.0-3
microsoftpatch availablevia msrc
Product: cm1 rust 1.47.0-3 on CBL Mariner 1.0Fixed in: 1.47.0-3
rustpatch availablevia ghsa
Product: sized-chunksFixed in: 0.6.3
ubuntupatch availablevia ubuntu_usn
Product: rust-sized-chunks (focal)Fixed in: 0.3.1-1ubuntu0.1~esm1

Vendor Advisories (3)

ubuntuUSN-8118-1

sized-chunks vulnerabilities

Mar 23, 2026
rustGHSA-rfgg-vccr-m46mhigh

Missing release of memory in sized-chunks

Aug 25, 2021
microsoft2020-Sep/CVE-2020-25794Important

An issue was discovered in the sized-chunks crate through 0.6.2 for Rust. In the Chunk implementation clone can have a memory-safety issue upon a panic.

Sep 8, 2020

References

github.com / bodil/sized-chunks/issues/11
ExploitPatchThird Party Advisory
rustsec.org / advisories/RUSTSEC-2020-0041.html
Third Party Advisory