What is CVE-2021-3802?

CVE-2021-3802 is a medium-severity vulnerability in Udisks Project, classified under Improper Input Validation. CVSS score: 4.2/10. Published 2021-11-29.

How severe is CVE-2021-3802?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Improper input validation in Udisks Project

CVE-2021-3802

A vulnerability found in udisks2. This flaw allows an attacker to input a specially crafted image file/USB leading to kernel panic. The highest threat from this vulnerability is to system availability.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2021-11-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.1th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000

Affected products

Udisks Project
Fedoraproject Fedora — versions 34
Red Hat Enterprise Linux — versions 8.0
Udisks2 — versions udisks-2.9.4

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-045.txt (Exploit, Third Party Advisory, Mitigation)
lists.debian.org/debian-lts-announce/2023/04/msg00009.html (mailing-list)

Frequently asked questions

What is CVE-2021-3802?: CVE-2021-3802 is a medium-severity vulnerability in Udisks Project, classified under Improper Input Validation. CVSS score: 4.2/10. Published 2021-11-29.
How severe is CVE-2021-3802?: Medium severity. CVSS v3 base score is 4.2 out of 10.