CVE-2022-0351

What it actually does

Out-of-bounds memory read before the start of a buffer in the vim text editor that can lead to local arbitrary code execution or process crash when processing crafted input.

Why it matters to the business

Local attackers can execute code on developer or administrator workstations that use vim, potentially leading to workstation compromise, data theft, or lateral movement with elevated urgency for organizations where vim is a core editing tool.

How an attack unfolds

An attacker prepares a specially crafted file or command-line input that triggers the buffer underflow when opened or processed by an affected vim binary; the resulting memory corruption is leveraged to gain code execution in the context of the user running vim.

How to fix it

Upgrade vim/vim to the commit 98056533b96b6b5d8849641de93185dd7bcadc44 or later; rebuild and redeploy any locally compiled installations; verify the updated binary reports the fixed version string.

How to confirm the fix worked

Run the updated vim binary against the original proof-of-concept input and confirm it no longer crashes or exhibits the underflow; compare build hash against the referenced commit; scan package repositories for the fixed release tag.

Typical attack path

1. Craft malicious file or input designed to trigger buffer underflow in vim
2. Deliver the file to the target via email, download, or shared storage
3. Convince the victim to open the file using the vulnerable vim binary
4. Exploit the memory corruption to execute attacker-controlled code locally

How to detect it

Review shell history, process creation logs, and file-access telemetry for unexpected vim invocations on crafted files; look for vim processes that terminate abnormally or spawn unusual child processes shortly after opening documents.

What your security team should do

• Immediately upgrade all vim installations to the commit 98056533b96b6b5d8849641de93185dd7bcadc44 or newer
• Block execution of known vulnerable vim binaries via endpoint policy until patched
• Monitor EPSS and exploit-availability feeds for any rise in observed in-the-wild use