CVE-2022-2819 in vim
Summary
by MITRE • 08/15/2022
Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.0210.
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Analysis
by VulDB Data Team • 05/27/2026
The heap-based buffer overflow vulnerability identified as CVE-2022-2819 affects the popular text editor vim version prior to 9.0.0210 and represents a critical security flaw that can be exploited to execute arbitrary code on affected systems. This vulnerability resides within the vim source code repository and demonstrates the classic characteristics of heap memory corruption issues that have plagued software applications for decades. The flaw occurs when the application processes certain input data structures that exceed allocated memory boundaries, leading to unpredictable behavior and potential system compromise.
The technical implementation of this buffer overflow stems from inadequate bounds checking within vim's memory management routines, specifically when handling dynamic heap allocations for buffer operations. Attackers can craft malicious input that triggers the vulnerability during normal text processing operations, particularly when vim encounters malformed data structures or extended character sequences. The flaw manifests as a heap-based buffer overflow, meaning that the application writes beyond the allocated memory region on the heap, potentially overwriting adjacent memory locations and corrupting critical data structures. This type of vulnerability is classified under CWE-122 as "Heap-based Buffer Overflow" and represents a fundamental memory safety issue that can be exploited through various attack vectors including file processing, network input handling, or user interaction scenarios.
The operational impact of CVE-2022-2819 extends beyond simple denial of service conditions to encompass full system compromise potential when exploited in the right context. Since vim is widely deployed across enterprise environments, development workstations, and server infrastructure, the vulnerability presents a significant risk to organizations that rely on this text editing tool for daily operations. The attack surface includes scenarios where users open malicious files, process untrusted input streams, or interact with compromised network services that utilize vim for text processing. Security researchers have documented that exploitation can lead to arbitrary code execution, privilege escalation, and persistent access to affected systems, making this vulnerability particularly dangerous in enterprise and cloud environments where vim is extensively used for configuration management and system administration tasks.
Mitigation strategies for CVE-2022-2819 should prioritize immediate patching of affected vim installations to version 9.0.0210 or later, which contains the necessary memory bounds checking fixes and heap management improvements. System administrators should implement comprehensive monitoring for suspicious file access patterns and input processing activities that may indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1059.006 for Command and Scripting Interpreter, as exploitation often involves crafting malicious input to trigger the buffer overflow during script execution or text processing operations. Organizations should also consider implementing application whitelisting policies that restrict vim execution to trusted environments, combined with regular security assessments of text processing workflows that may inadvertently expose systems to this vulnerability through legitimate use cases. Network segmentation and input validation controls should be strengthened to prevent exploitation through web-based or network-accessible vim instances that process untrusted content from external sources.