CVE-2022-2571

What it actually does

Heap-based buffer overflow in Vim that can lead to arbitrary code execution or denial of service when processing crafted input.

Why it matters to the business

Attackers could gain control of developer or administrator workstations that use Vim, potentially leading to source code theft, lateral movement, or ransomware deployment; however, low exploit prevalence reduces immediate widespread risk.

How an attack unfolds

An attacker creates a specially crafted file that triggers the heap overflow in Vim's input handling routines; the victim is tricked into opening the file locally, allowing the overflow to corrupt memory and execute attacker-controlled code.

How to fix it

Upgrade vim/vim to commit 4e677b9c40ccbc5f090971b31dc2fe07bf05541d or later release equivalent to 9.0.0101 or newer.

How to confirm the fix worked

Verify installed Vim version reports 9.0.0101 or higher; attempt to open known trigger files in a controlled environment and confirm absence of crashes or unexpected memory behavior.

Typical attack path

1. Craft malicious file exploiting the buffer overflow condition
2. Deliver file via email, download link, or shared repository
3. Victim opens file with vulnerable Vim version under local context
4. Overflow occurs during parsing, enabling shellcode execution or crash

How to detect it

Review system logs for Vim process crashes or unexpected child process spawns; inspect user file access history for recently opened suspicious documents around the time of any anomalous behavior.

What your security team should do

• Prioritize patching all Vim installations to the fixed commit within standard change windows
• Restrict execution of untrusted files with Vim on developer endpoints
• Monitor EPSS and KEV updates for any increase in observed exploitation