PatchTheCVECVE-2020-35903: An issue was discovered in the dync crate before 0.5.0 for Rust
CVE-2020-35903 is a medium-severity flaw (CVSS 5.5) affecting dync. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue was discovered in the dync crate before 0.5.0 for Rust. VecCopy allows misaligned element access because u8 is not always the type in question.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.5 (Medium) |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 68%) |
| CISA exploited list | No |
| Published | 2020-12-31 |
| 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-2020-35903?
dync: upgrade to 0.5.0. Exact commands for each OS are on this page.
Is CVE-2020-35903 being exploited?
CVE-2020-35903 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-2020-35903 affect?
CVE-2020-35903 affects dync. Severity is medium (CVSS 5.5). An issue was discovered in the dync crate before 0.5.0 for Rust. VecCopy allows misaligned element access because u8 is not always the type in question.
How urgent is CVE-2020-35903?
Priority 32/100. Public exploit reference