What is CVE-2021-33637?

CVE-2021-33637 is a high-severity vulnerability in Openeuler Isula, classified under Improper Initialization. CVSS score: 8.4/10. Published 2023-10-29.

How severe is CVE-2021-33637?

High severity. CVSS v3 base score is 8.4 out of 10.

Is CVE-2021-33637 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Openeuler Isula

CVE-2021-33637

When the isula export command is used to export a container to an image and the container is controlled by an attacker, the attacker can escape the container.

Vulnerability class: Dirty Pipe (CVE-2022-0847)

Published 2023-10-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (10.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Openeuler Isula — versions 2.0.8-20210518.144540, 2.0.18-10, 2.1.2
Openeuler Isulad — versions 0

Weakness classification (CWE)

CWE-665 — Improper Initialization

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.openeuler.org/zh/security/security-bulletins/detail/ (Vendor Advisory)
gitee.com/src-openeuler/iSulad/pulls/627/files (Patch)
gitee.com/src-openeuler/iSulad/pulls/600/files (Patch)

Frequently asked questions

What is CVE-2021-33637?: CVE-2021-33637 is a high-severity vulnerability in Openeuler Isula, classified under Improper Initialization. CVSS score: 8.4/10. Published 2023-10-29.
How severe is CVE-2021-33637?: High severity. CVSS v3 base score is 8.4 out of 10.
Is CVE-2021-33637 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.