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Fencer Vulns
medium 4.2

CVE-2021-3802 json

A vulnerability found in udisks2.

published 2021-11-29 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-27061

cvss
4.2
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 60%
public exploits
0
none known

Summary

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.

Patch / fix

  • udisks_project udisks 2.9.4
  • udisks2 Debian 14, Debian 13, Debian 12 2.9.4-1

debian advisories DEBIAN-CVE-2021-3802

  • udisks2 RHEL 8 2.9.0-9.el8
  • libudisks2 RHEL 8 2.9.0-9.el8
  • udisks2-lsm RHEL 8 2.9.0-9.el8
  • udisks2-lvm2 RHEL 8 2.9.0-9.el8
  • udisks2-iscsi RHEL 8 2.9.0-9.el8

red hat advisories RHSA-2022:1820

  • udisks2 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +6 more 2.1.3-3.8.1
  • udisks2 SLE Module for Basesystem 15 SP3, openSUSE Leap 15.3 2.8.1-150200.3.3.1
  • udisks2 SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 2.9.2-150400.3.3.1

suse advisories SUSE-SU-2022:3160-1SUSE-SU-2022:3154-1SUSE-SU-2022:1919-1

  • udisks2 AlmaLinux 8 2.9.0-9.el8
  • libudisks2 AlmaLinux 8 2.9.0-9.el8
  • udisks2-lsm AlmaLinux 8 2.9.0-9.el8
  • udisks2-lvm2 AlmaLinux 8 2.9.0-9.el8
  • udisks2-iscsi AlmaLinux 8 2.9.0-9.el8

almalinux advisories ALSA-2022:1820

  • udisks2 Rocky Linux 8 2.9.0-9.el8

rocky linux advisories RLSA-2022:1820

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-3802 updated cvss 4.5

udisks2: insecure defaults in user-accessible mount helpers allow for a DoS

  • Red Hat Enterprise Linux 7 udisks2, libudisks2, udisks2-lsm, udisks2-lvm2, udisks2-iscsi
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) udisks2 2.9.0-9.el8, libudisks2 2.9.0-9.el8, udisks2-lsm 2.9.0-9.el8, udisks2-lvm2 2.9.0-9.el8, udisks2-iscsi 2.9.0-9.el8 Red Hat Enterprise Linux CRB (v. 8) udisks2 2.9.0-9.el8, libudisks2 2.9.0-9.el8, udisks2-lsm 2.9.0-9.el8, udisks2-lvm2 2.9.0-9.el8, udisks2-iscsi 2.9.0-9.el8
    fixed: vendor fix RHSA-2022:1820
  • Red Hat Enterprise Linux 9 udisks2, libudisks2, udisks2-lsm, udisks2-lvm2, udisks2-iscsi
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • syss.de https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-045.txt referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 4.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 6.3 AV:N/AC:M/Au:S/C:N/I:N/A:C

Affected products

  • n/a udisks2

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.