What is CVE-2021-28031?

CVE-2021-28031 is a critical-severity vulnerability in Scratchpad Project, classified under Double Free. CVSS score: 9.8/10. Published 2021-03-05.

How severe is CVE-2021-28031?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Double Free in Scratchpad Project

CVE-2021-28031

An issue was discovered in the scratchpad crate before 1.3.1 for Rust. The move_elements function can have a double-free upon a panic in a user-provided f function.

Vulnerability class: Double Free

Published 2021-03-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (70.8th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Scratchpad Project

Weakness classification (CWE)

CWE-415 — Double Free

References

rustsec.org/advisories/RUSTSEC-2021-0030.html (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-28031?: CVE-2021-28031 is a critical-severity vulnerability in Scratchpad Project, classified under Double Free. CVSS score: 9.8/10. Published 2021-03-05.
How severe is CVE-2021-28031?: Critical severity. CVSS v3 base score is 9.8 out of 10.