Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-44225

21
FAUCET Score

CVE-2021-44225 describes an access control bypass vulnerability in Keepalived through version 2.2.4, affecting Fedora and Keepalived products. The flaw stems from insufficient D-Bus policy restrictions, allowing any user to inspect and manipulate properties of unrelated D-Bus system services. Rated Medium severity (CVSS 5.4), this vulnerability could lead to limited confidentiality and integrity impacts with low attack complexity and no user interaction required. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.2.4CPE matchmatch criteria
cpe:2.3:a:keepalived:keepalived:*:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
35CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.08%
Probability of exploitation in next 30 days
EPSS Percentile
61.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0108 is in the 75th percentile among its peer group of 21,977 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (10)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 18947-16820Fixed in: 2.0.10-7
microsoftpatch availablevia msrc
Product: 18948-16823Fixed in: 2.2.7-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 2.0.10-7
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 2.0.10-7
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 2.2.7-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 2.2.7-1
microsoftpatch availablevia msrc
Product: cm1 keepalived 2.0.10-7 on CBL Mariner 1.0Fixed in: 2.0.10-7
microsoftpatch availablevia msrc
Product: cbl2 keepalived 2.2.7-1 on CBL Mariner 2.0Fixed in: 2.2.7-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: keepalived-0:2.1.5-8.el8
View patch

Vendor Advisories (3)

microsoft2021-Dec/CVE-2021-44225

CVE-2021-44225

Dec 14, 2021
redhatCVE-2021-44225Moderate

keepalived: dbus access control bypass

Nov 26, 2021
microsoft2021-Nov/CVE-2021-44225Moderate

In Keepalived through 2.2.4 the D-Bus policy does not sufficiently restrict the message destination allowing any user to inspect and manipulate any property. This leads to access-control bypass in some situations in which an unrelated D-Bus system service has a settable (writable) property

Nov 9, 2021

References

github.com / acassen/keepalived/commit/7977fec0be89ae6fe87405b3f8da2f0b5e415e3d
PatchThird Party Advisory
github.com / acassen/keepalived/pull/2063
Third Party Advisory
lists.debian.org / debian-lts-announce/2023/04/msg00012.html
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/5226RYNMNB7FL4MSJDIBBGPUWH6LMRYV
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/6O2R6EXURJQFPFPYFWRCZLUYVWQCLSZM