CVE-2021-31919

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-30 · updated 2026-06-17
Weakness: CWE-909

Description

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.

Affected products

Rkyv Project Rkyv: before 0.6.0 — fixed in 0.6.0

How to fix

Upgrade to a fixed version: Rkyv Project Rkyv 0.6.0. Check the vendor advisory for mitigations.

References

https://rustsec.org/advisories/RUSTSEC-2021-0054.html
https://rustsec.org/advisories/RUSTSEC-2021-0054.html

Get alerted when CVE-2021-31919 or the next vulnerability affects your stack