What is CVE-2021-45685?

CVE-2021-45685 is a critical-severity vulnerability in Columnar Project, classified under Use of Uninitialized Resource. CVSS score: 9.8/10. Published 2021-12-27.

How severe is CVE-2021-45685?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Columnar Project

CVE-2021-45685

An issue was discovered in the columnar crate through 2021-01-07 for Rust. ColumnarReadExt::read_typed_vec may read from uninitialized memory locations.

Published 2021-12-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Columnar Project

Weakness classification (CWE)

CWE-908 — Use of Uninitialized Resource

References

rustsec.org/advisories/RUSTSEC-2021-0087.html (Third Party Advisory)
raw.githubusercontent.com/rustsec/advisory-db/main/crates/columnar/RUSTSEC-2021… (Third Party Advisory)

Frequently asked questions

What is CVE-2021-45685?: CVE-2021-45685 is a critical-severity vulnerability in Columnar Project, classified under Use of Uninitialized Resource. CVSS score: 9.8/10. Published 2021-12-27.
How severe is CVE-2021-45685?: Critical severity. CVSS v3 base score is 9.8 out of 10.