Is CVE-2021-3903 in the CISA KEV catalog?

No. CVE-2021-3903 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3903?

CVE-2021-3903 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2021-3903?

CVE-2021-3903 has an EPSS score of 0.60% (44th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3903?

Upgrade vim on debian 12 to 2:8.2.3565-1 or later. Fixes are available for 27 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3903

HIGH

7.8

CVSS v3

NVD

Description

vim is vulnerable to Heap-based Buffer Overflow

CWE-122Heap-based Buffer Overflow CWE-787Out-of-bounds Write

How to fix

Remediation Available

vimDebian

Fixed in:2:8.2.3565-1CVE-2021-3903

vimRed Hat / RHEL

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vimRocky

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-X11Red Hat / RHEL

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-X11Rocky

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-X11-debuginfoRocky

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-X11-debuginfoRed Hat / RHEL

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-commonRed Hat / RHEL

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-commonRocky

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-common-debuginfoRed Hat / RHEL

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-common-debuginfoRocky

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-debuginfoRed Hat / RHEL

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-debuginfoRocky

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-debugsourceRocky

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-debugsourceRed Hat / RHEL

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-enhancedRocky

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-enhancedRed Hat / RHEL

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-enhanced-debuginfoRed Hat / RHEL

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-enhanced-debuginfoRocky

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-filesystemRocky

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-filesystemRed Hat / RHEL

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-minimalRed Hat / RHEL

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-minimalRocky

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-minimal-debuginfoRocky

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vim-minimal-debuginfoRed Hat / RHEL

Fixed in:2:8.2.2637-21.el9RHSA-2024:9405

vimUbuntu

Fixed in:2:7.4.052-1ubuntu3.1+esm4USN-5147-1

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

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

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

VimWindows application

Affected:8.2.3564Fixed in:8.2.3564Bram Moolenaar et al.

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

0.60%probability of exploitation in 30 days

44thpercentile

Moderate risk: more likely to be exploited than 44% of all known CVEs.

References

Patch2

Third-Party Advisory2

Other references3

Related Vulnerabilities

Other CWE-122 (Heap-based Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2024-26256	High	7.8	88%	-	Fix
CVE-2020-25687	Medium	5.9	87%	-	Fix
CVE-2009-3459	High	8.8	86%	KEV	Fix
CVE-2021-21017	High	8.8	86%	KEV	-
CVE-2020-25683	Medium	5.9	86%	-	Fix

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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 2024-11-21.