CVE-2022-2206 in vim
Summary
by MITRE • 06/27/2022
Out-of-bounds Read in GitHub repository vim/vim prior to 8.2.
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Analysis
by VulDB Data Team • 05/24/2026
The vulnerability identified as CVE-2022-2206 represents a critical out-of-bounds read flaw discovered in the popular vim text editor repository prior to version 8.2. This issue manifests within the vim codebase and affects users who utilize the editor for text manipulation and file handling operations. The vulnerability stems from inadequate input validation mechanisms that fail to properly bounds-check memory accesses during specific text processing operations. The flaw allows an attacker to potentially read memory locations outside the intended buffer boundaries, which could expose sensitive data or lead to system instability. This type of vulnerability falls under the category of memory safety issues that have been extensively documented in cybersecurity literature and are commonly associated with buffer over-read conditions that can be exploited for information disclosure or privilege escalation attacks.
The technical implementation of this out-of-bounds read vulnerability occurs when vim processes certain text input or file operations that trigger improper memory access patterns. The flaw specifically affects how the editor handles particular string manipulations or file parsing routines where buffer boundaries are not adequately validated before memory access operations. When an attacker can craft malicious input that exploits this condition, the program may attempt to read data from memory locations that are not properly allocated or accessible, potentially exposing system information, user credentials, or other sensitive data. This vulnerability aligns with CWE-125, which describes out-of-bounds read conditions in software implementations, and represents a classic example of memory safety violations that have been the subject of numerous security research papers and industry best practices documentation. The vulnerability's impact is particularly concerning given vim's widespread deployment across various operating systems and its frequent use in development environments and server configurations.
The operational impact of CVE-2022-2206 extends beyond simple memory corruption issues as it can potentially enable attackers to extract confidential information from system memory, leading to data breaches or further exploitation opportunities. In environments where vim is used for editing configuration files, source code, or sensitive documents, an attacker could leverage this vulnerability to access information that should remain protected. The attack surface is broad since vim is commonly installed on development workstations, servers, and cloud environments where it serves as a primary text editing tool for system administrators, developers, and security professionals. This vulnerability can be particularly dangerous when combined with other exploitation techniques, as it may serve as a stepping stone for more sophisticated attacks. The vulnerability affects not just individual user systems but also enterprise environments where vim is deployed at scale, making it a significant concern for security teams responsible for maintaining system integrity and protecting sensitive data assets.
Mitigation strategies for CVE-2022-2206 primarily involve immediate patching of affected vim installations to version 8.2 or later, which contains the necessary code fixes to address the out-of-bounds read condition. System administrators should prioritize updating all vim installations across their infrastructure, particularly in environments where the editor is used for handling sensitive data or where it may be exposed to untrusted input. Additional protective measures include implementing input validation controls, restricting vim usage in high-security environments, and monitoring for suspicious file access patterns that might indicate exploitation attempts. Organizations should also consider implementing application whitelisting policies that limit execution of potentially vulnerable software versions and establish incident response procedures for detecting and responding to exploitation attempts. The vulnerability's classification as a memory safety issue aligns with ATT&CK technique T1059.007 for scripting languages, where attackers might leverage such flaws to execute malicious code through text processing operations, making comprehensive security monitoring essential for early detection and response.