CVE-2021-26305

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-01-29 · updated 2026-06-17
Weakness: CWE-908

Description

An issue was discovered in Deserializer::read_vec in the cdr crate before 0.2.4 for Rust. A user-provided Read implementation can gain access to the old contents of newly allocated heap memory, violating soundness.

Affected products

Cdr Project Cdr: before 0.2.4 — fixed in 0.2.4

How to fix

Upgrade to a fixed version: Cdr Project Cdr 0.2.4. Check the vendor advisory for mitigations.

References

https://rustsec.org/advisories/RUSTSEC-2021-0012.html
https://rustsec.org/advisories/RUSTSEC-2021-0012.html

Get alerted when CVE-2021-26305 or the next vulnerability affects your stack