CVE & CISA-KEV Catalog

CVE-2021-3928

HIGH
7.8
CVSS v3
NVD

Description

vim is vulnerable to Use of Uninitialized Variable

CWE-457CWE-908

How to fix

Remediation Available
vim-X11Amazon
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:8.2.4006-1.amzn2.0.1
vim-commonAmazon
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
vim-common-debuginfoAmazon
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
vim-dataAmazon
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:9.0.1160-1.amzn2023.0.2
vim-debuginfoAmazon
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
vim-debugsourceAmazon
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
vim-default-editorAmazon
Fixed in:2:9.0.1160-1.amzn2023.0.2
vim-enhancedAmazon
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
vim-enhanced-debuginfoAmazon
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
vim-filesystemAmazon
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:9.0.1160-1.amzn2023.0.2
vim-minimalAmazon
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:8.2.4006-1.amzn2.0.1
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
vim-minimal-debuginfoAmazon
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
Fixed in:2:9.0.1160-1.amzn2023.0.2
vimDebian
Fixed in:2:8.2.3995-1CVE-2021-3928
Fixed in:2:8.2.3995-1CVE-2021-3928
Fixed in:2:8.2.3995-1CVE-2021-3928
vimUbuntu
Fixed in:2:7.4.052-1ubuntu3.1+esm4USN-5147-1

This Ubuntu release reached end-of-life on 2019-04-02.

Fixed in:2:7.4.1689-3ubuntu1.5+esm3USN-5147-1

This Ubuntu release reached end-of-life on 2021-04-02.

Fixed in:2:8.0.1453-1ubuntu1.7USN-5147-1

This Ubuntu release reached end-of-life on 2023-05-31. Extended security maintenance is available until 2028-04-01.

Fixed in:2:8.1.2269-1ubuntu5.4USN-5147-1

This Ubuntu release reached end-of-life on 2025-05-31. Extended security maintenance is available until 2030-04-02.

VimWindows application
Affected:8.2.3582Fixed in:8.2.3582Bram Moolenaar et al.

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

0.64%probability of exploitation in 30 days
49thpercentile

Moderate risk: more likely to be exploited than 49% of all known CVEs.

References

Mitigation1

Related Vulnerabilities

Other CWE-457 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2025-5777High7.5100%KEV + RansomFix
CVE-2009-0901High8.837%--
CVE-2021-40418Critical9.818%--
CVE-2019-11038Medium5.34.3%-Fix
CVE-2021-31435High7.82.8%--
CVE-2021-46570High7.82.1%-Fix

Common questions

How do I fix CVE-2021-3928?

Published advisories record a fix for 15 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2021-3928 being actively exploited?

Not that we know of. CVE-2021-3928 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.64% is the estimated probability that it will be exploited in the next 30 days. That is higher than 49% of all scored CVEs.

How severe is CVE-2021-3928?

CVE-2021-3928 has a CVSS v3 base score of 7.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2021-3928 affect?

Published advisories record a fix for vim-X11 (Amazon), vim-common (Amazon), vim-common-debuginfo (Amazon), vim-data (Amazon), and 11 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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CVE-2021-3928 severity badge

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.