CVE-2022-2129 – CVE-2022-2129 is an out-of-bounds write vulnera... (How to Fix)

Q: What is the severity of CVE-2022-2129?

CVE-2022-2129 has a CVSS score of 7.8 (HIGH). CVE-2022-2129 is an out-of-bounds write vulnerability in Vim text editor versions prior to 8.2. This allows attackers to execute arbitrary code by tricking users into opening specially crafted files. Anyone using vulnerable Vim versions is affected, particularly developers and system administrators who use Vim for editing files.

📋 TL;DR

CVE-2022-2129 is an out-of-bounds write vulnerability in Vim text editor versions prior to 8.2. This allows attackers to execute arbitrary code by tricking users into opening specially crafted files. Anyone using vulnerable Vim versions is affected, particularly developers and system administrators who use Vim for editing files.

💻 Affected Systems

Products:

Vim text editor

Versions: All versions prior to 8.2

Operating Systems: Linux, Unix-like systems, Windows, macOS

Default Config Vulnerable: ⚠️ Yes

Notes: All Vim installations with versions before 8.2 are vulnerable regardless of configuration. Vim is commonly installed by default on many Linux distributions.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution with the privileges of the Vim user, potentially leading to full system compromise if Vim is run with elevated privileges.

🟠

Likely Case

Local privilege escalation or arbitrary code execution when users open malicious files, potentially leading to data theft or further lateral movement.

🟢

If Mitigated

Limited impact if Vim runs with minimal privileges and proper file validation is in place, though arbitrary code execution is still possible.

🌐 Internet-Facing: LOW - Vim is typically not directly exposed to the internet, though could be exploited through web interfaces or file uploads.

🏢 Internal Only: MEDIUM - High risk in development environments where users frequently open various files, lower in production systems with restricted Vim usage.

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires user interaction to open a malicious file. Proof of concept details are available in the huntr.dev bounty report.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Vim 8.2 and later

Vendor Advisory: https://github.com/vim/vim/commit/d6211a52ab9f53b82f884561ed43d2fe4d24ff7d

Restart Required: No

Instructions:

1. Update Vim using your system package manager. 2. For Debian/Ubuntu: sudo apt update && sudo apt upgrade vim. 3. For RHEL/CentOS/Fedora: sudo yum update vim or sudo dnf update vim. 4. For macOS with Homebrew: brew upgrade vim. 5. For Windows: Download latest version from vim.org.

🔧 Temporary Workarounds

Restrict Vim usage

all

Limit Vim usage to trusted users and environments only

Use alternative editors

all

Temporarily use nano, emacs, or other text editors until patched

🧯 If You Can't Patch

Run Vim with minimal privileges using sudo restrictions or SELinux/AppArmor
Implement strict file validation and scanning for all files opened in Vim

🔍 How to Verify

Check if Vulnerable:

Run 'vim --version' and check if version is less than 8.2

Check Version:

vim --version | head -1

Verify Fix Applied:

Run 'vim --version' and confirm version is 8.2 or higher

📡 Detection & Monitoring

Log Indicators:

Vim process crashes with segmentation faults
Unusual file access patterns from Vim processes

Network Indicators:

None - this is a local file-based exploit

SIEM Query:

Process:Name=vim AND (EventID=1000 OR Signal=SIGSEGV)

📊 Metadata

CVE ID: CVE-2022-2129

CVSS v3 Score: 7.8 (HIGH)

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

CWE: CWE-787

Published: June 19, 2022

Last Updated: November 3, 2025

🔗 References

https://github.com/vim/vim/commit/d6211a52ab9f53b82f884561ed43d2fe4d24ff7d Patch,Third Party Advisory
https://huntr.dev/bounties/3aaf06e7-9ae1-454d-b8ca-8709c98e5352 Exploit,Patch,Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00032.html Mailing List,Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFD2A4YLBR7OIRHTL7CK6YNMEIQ264CN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U743FMJGFQ35GBPCQ6OWMVZEJPDFVEWM/
https://security.gentoo.org/glsa/202208-32 Third Party Advisory
https://security.gentoo.org/glsa/202305-16
https://github.com/vim/vim/commit/d6211a52ab9f53b82f884561ed43d2fe4d24ff7d Patch,Third Party Advisory
https://huntr.dev/bounties/3aaf06e7-9ae1-454d-b8ca-8709c98e5352 Exploit,Patch,Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00032.html Mailing List,Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/03/msg00023.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFD2A4YLBR7OIRHTL7CK6YNMEIQ264CN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U743FMJGFQ35GBPCQ6OWMVZEJPDFVEWM/
https://security.gentoo.org/glsa/202208-32 Third Party Advisory
https://security.gentoo.org/glsa/202305-16

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