CVE-2025-22134
📋 TL;DR
CVE-2025-22134 is a heap-buffer overflow vulnerability in Vim that occurs when switching buffers using the :all command while visual mode is active. This allows attackers to potentially execute arbitrary code or cause application crashes. Users running vulnerable Vim versions with visual mode enabled are affected.
💻 Affected Systems
- Vim
📦 What is this software?
Vim by Vim
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if Vim is used to process malicious files or network content.
Likely Case
Application crash (segmentation fault) causing denial of service and potential data loss in unsaved buffers.
If Mitigated
Limited to local user impact with no privilege escalation if proper sandboxing is in place.
🎯 Exploit Status
Exploitation requires user interaction (enabling visual mode and executing :all command). No public exploits available as of advisory date.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Vim patch v9.1.1003
Vendor Advisory: https://github.com/vim/vim/security/advisories/GHSA-5rgf-26wj-48v8
Restart Required: No
Instructions:
1. Update Vim to version with patch v9.1.1003 or later. 2. For package managers: 'sudo apt update && sudo apt upgrade vim' (Debian/Ubuntu) or 'sudo yum update vim' (RHEL/CentOS). 3. For source compilation: Download latest Vim source and compile with './configure && make && sudo make install'.
🔧 Temporary Workarounds
Avoid visual mode with :all command
allPrevent triggering the vulnerability by ensuring visual mode is not active when using :all command.
vim -c ':set visualbell' -c ':set noerrorbells'
Disable visual mode
allTemporarily disable visual mode functionality to prevent exploitation.
vim -c ':set novisualmode'
🧯 If You Can't Patch
- Restrict Vim usage to trusted users only via sudoers or access controls.
- Implement application whitelisting to prevent unauthorized Vim execution.
🔍 How to Verify
Check if Vulnerable:
Run 'vim --version' and check if patch 9.1.1003 is listed. If not present and version is below 9.1.1003, system is vulnerable.Check Version:
vim --version | grep -i 'patch'Verify Fix Applied:
After patching, run 'vim --version' and confirm 'Included patches: 1-1003' or higher appears in output.📡 Detection & Monitoring
Log Indicators:
- Segmentation fault logs in system logs (dmesg, /var/log/messages)
- Vim crash reports with signal 11 (SIGSEGV)
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
Process:Name='vim' AND EventID='1000' OR Signal='11'