6.5

CVE-2021-4147: fedoraproject fedora Improper Locking

Modified
AliasesSUSE-SU-2022:0021-1UBUNTU-CVE-2021-4147DEBIAN-CVE-2021-4147
Published 25-03-2022Last modified 03-08-2024

Vulnerability summary

CVE-2021-4147 is a medium (CVSS 6.5) Improper Locking vulnerability in fedoraproject fedora. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 10 · Related 9
DLA-3778-1SUSE-SU-2022:0031-1SUSE-SU-2022:0032-1SUSE-SU-2022:0041-1SUSE-SU-2022:0042-1SUSE-SU-2022:0045-1

Timeline

  1. 25-03-2022
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

A flaw was found in the libvirt libxl driver. A malicious guest could continuously reboot itself and cause libvirtd on the host to deadlock or crash, resulting in a denial of service condition.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Suse3 products
  • libvirt&distro=SUSE Linux Enterprise Micro 5.1< 7.1.0-6.11.1
  • libvirt&distro=SUSE Linux Enterprise Module for Basesystem 15 SP3< 7.1.0-6.11.1
  • libvirt&distro=SUSE Linux Enterprise Module for Server Applications 15 SP3< 7.1.0-6.11.1
Opensuse2 products
  • libvirt&distro=openSUSE Leap 15.3< 7.1.0-6.11.1
  • libvirt&distro=openSUSE Tumbleweed< 8.0.0-1.1
Debian1 product
  • libvirt< 7.10.0-2
Fedoraproject1 product
Netapp1 product
Redhat1 product
Ubuntu1 product
  • libvirtAll versions (No fix recorded) | < 1.3.1-1ubuntu10.31+esm1 | < 4.0.0-1ubuntu8.21 | < 6.0.0-0ubuntu8.16

7 vendors · 10 products

References

18 links
Show all 18 references