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CVE-2021-26954

18
FAUCET Score

CVE-2021-26954 describes a double-free vulnerability in the qwutils Rust crate prior to version 0.3.1, specifically within the insert_slice_clone function when a Clone panic occurs. This medium-severity vulnerability (CVSS 5.3) can lead to a denial of service (availability impact) and can be triggered remotely with low attack complexity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.3.1CPE matchmatch criteria
cpe:2.3:a:qwutils_project:qwutils:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.36%
Probability of exploitation in next 30 days
EPSS Percentile
68.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0136 is in the 50th percentile among its peer group of 23,725 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

rustpatch availablevia ghsa
Product: qwutilsFixed in: 0.3.1

Vendor Advisories (1)

rustGHSA-68p4-pjpf-xwcqmedium

insert_slice_clone can double drop if Clone panics.

May 24, 2022

References

rustsec.org / advisories/RUSTSEC-2021-0018.html
ExploitVendor Advisory