CVE-2022-2175

What it actually does

Buffer over-read in Vim's file parsing logic allowing out-of-bounds memory access when processing crafted input, resulting in information disclosure or process crash.

Why it matters to the business

Developers and operators using affected Vim versions risk editor crashes or leakage of sensitive data in memory when opening untrusted files, disrupting editing workflows and potentially exposing confidential information.

How an attack unfolds

An attacker crafts a malicious file that triggers the buffer over-read during Vim's parsing routines. The victim opens the file locally in a vulnerable Vim instance (user interaction required), causing the over-read to execute and leak memory contents or crash the editor.

How to fix it

Upgrade vim/vim to the fixed commit 98056533b96b6b5d8849641de93185dd7bcadc44 or later. Rebuild from source or obtain a patched package for the distribution in use.

How to confirm the fix worked

Verify Vim reports the fixed commit or version 8.2+. Test opening known trigger files in a controlled environment and confirm absence of crashes or unexpected memory access.

Typical attack path

1. Craft a file designed to trigger buffer over-read in Vim parsing
2. Deliver the file to the target via email, download, or shared storage
3. Victim opens the file using a vulnerable Vim binary
4. Vim processes the file and performs the out-of-bounds read
5. Attacker observes crash or obtains leaked memory data

How to detect it

Monitor system logs and Vim crash reports for segmentation faults or memory errors during file open operations; review process execution history for unexpected Vim invocations on suspicious files.

What your security team should do

• Prioritize updating all Vim installations to the fixed commit
• Restrict opening of untrusted files in Vim until patched
• Include Vim in regular software inventory and patch cycles