PatchTheCVECVE-2021-28031: An issue was discovered in the scratchpad crate before 1.3.1 for Rust
CVE-2021-28031 is a critical-severity flaw (CVSS 9.8) affecting scratchpad. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.4% (top 28%) |
| CISA exploited list | No |
| Weakness | CWE-415 |
| Published | 2021-03-05 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2021-28031?
scratchpad: upgrade to 1.3.1. Exact commands for each OS are on this page.
Is CVE-2021-28031 being exploited?
CVE-2021-28031 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2021-28031 affect?
CVE-2021-28031 affects scratchpad. Severity is critical (CVSS 9.8). 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.
How urgent is CVE-2021-28031?
Priority 57/100. Critical severity; Remotely exploitable, no login, no user action