PatchTheCVECVE-2021-31919: An issue was discovered in the rkyv crate before 0.6.0 for Rust
CVE-2021-31919 is a high-severity flaw (CVSS 7.5) affecting rkyv. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
An issue was discovered in the rkyv crate before 0.6.0 for Rust. When an archive is created via serialization, the archive content may contain uninitialized values of certain parts of a struct.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.1% (top 35%) |
| CISA exploited list | No |
| Weakness | CWE-909 |
| Published | 2021-04-30 |
| 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-2021-31919?
rkyv: upgrade to 0.6.0. Exact commands for each OS are on this page.
Is CVE-2021-31919 being exploited?
CVE-2021-31919 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-2021-31919 affect?
CVE-2021-31919 affects rkyv. Severity is high (CVSS 7.5). An issue was discovered in the rkyv crate before 0.6.0 for Rust. When an archive is created via serialization, the archive content may contain uninitialized values of certain parts of a struct.
How urgent is CVE-2021-31919?
Priority 48/100. High severity; Remotely exploitable, no login, no user action