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CVE-2021-4192

28
FAUCET Score

CVE-2021-4192 is a Use-After-Free vulnerability affecting Vim, with potential impact on Apple, Debian, and Fedora Project systems. It carries a high CVSS score of 7.8, indicating a significant risk due to its local attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or notable community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 8.2.3949CPE matchmatch criteria
cpe:2.3:a:vim:vim:*:*:*:*:*:*:*:*
34CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
10.15.7CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:10.15.7:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.73%
Probability of exploitation in next 30 days
EPSS Percentile
75.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0173 is in the 74th percentile among its peer group of 11,621 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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: 18930-16820Fixed in: 8.2.4006-1
microsoftpatch availablevia msrc
Product: 18812-16823Fixed in: 8.2.4081-1
microsoftpatch availablevia msrc
Product: cm1 vim 8.2.4006-1 on CBL Mariner 1.0Fixed in: 8.2.4006-1
microsoftpatch availablevia msrc
Product: cbl2 vim 8.2.4081-1 on CBL Mariner 2.0Fixed in: 8.2.4081-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 8.2.4006-1
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 8.2.4006-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 8.2.4081-1
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 8.2.4081-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: vim-2:8.0.1763-16.el8_5.4
View patch

Vendor Advisories (3)

microsoft2022-Jan/CVE-2021-4192

CVE-2021-4192

Jan 11, 2022
redhatCVE-2021-4192Moderate

vim: use-after-free in win_linetabsize()

Dec 31, 2021
microsoft2021-Dec/CVE-2021-4192Important

Use After Free in vim/vim

Dec 14, 2021

References

seclists.org / fulldisclosure/2022/Jul/14
Mailing ListThird Party Advisory
seclists.org / fulldisclosure/2022/Mar/29
Mailing ListThird Party Advisory
seclists.org / fulldisclosure/2022/May/35
Mailing ListThird Party Advisory
github.com / vim/vim/commit/4c13e5e6763c6eb36a343a2b8235ea227202e952
PatchThird Party Advisory
huntr.dev / bounties/6dd9cb2e-a940-4093-856e-59b502429f22
ExploitThird Party Advisory
lists.debian.org / debian-lts-announce/2022/03/msg00018.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2022/11/msg00009.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/3FH2J57GDA2WMBS6J56F6QQRA6BXQQFZ
security.gentoo.org / glsa/202208-32
Third Party Advisory
support.apple.com / kb/HT213183
Release NotesThird Party Advisory
support.apple.com / kb/HT213256
Third Party Advisory
support.apple.com / kb/HT213343
Third Party Advisory
openwall.com / lists/oss-security/2022/01/15/1
Mailing ListThird Party Advisory