CVE-2022-1897 in vim
Summary
by MITRE • 05/27/2022
Out-of-bounds Write in GitHub repository vim/vim prior to 8.2.
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Analysis
by VulDB Data Team • 04/12/2026
The vulnerability identified as CVE-2022-1897 represents a critical out-of-bounds write flaw discovered in the popular text editor vim prior to version 8.2. This issue was reported in the github repository vim/vim and constitutes a severe security weakness that could potentially allow remote code execution or system compromise. The vulnerability stems from improper bounds checking during specific text processing operations within the vim editor's codebase, creating a scenario where malicious input could trigger memory corruption. Such flaws typically arise when software fails to validate input data against expected boundaries, allowing attackers to write data beyond allocated memory regions. The out-of-bounds write condition creates opportunities for exploitation through buffer overflow techniques that can be leveraged to execute arbitrary code or cause denial of service conditions.
The technical implementation of this vulnerability involves scenarios where vim processes certain input sequences that trigger memory allocation and manipulation routines without adequate boundary validation. When processing specific text patterns or file formats, the editor's internal functions may attempt to write data beyond the intended memory buffer limits. This type of flaw aligns with CWE-787, which specifically addresses out-of-bounds write vulnerabilities in software systems. The vulnerability's exploitation potential is heightened by the widespread use of vim across various operating systems and platforms, making it an attractive target for attackers seeking to compromise systems through remote execution vectors. Attackers could potentially craft malicious input files or network traffic that, when processed by the vulnerable vim version, would trigger the out-of-bounds write condition.
The operational impact of CVE-2022-1897 extends beyond simple denial of service scenarios to include potential remote code execution capabilities that could allow attackers to gain unauthorized system access. Systems running vulnerable versions of vim are at risk when processing untrusted input through the editor, particularly in environments where users might encounter malicious files or when vim is used in automated processing pipelines. The vulnerability's presence in a widely deployed text editor creates a significant risk surface that could be exploited in various attack scenarios including web application exploitation, file transfer protocols, or automated system administration tasks. Organizations using vim in production environments should consider the potential for privilege escalation or lateral movement if the editor is used with elevated permissions or in system management contexts.
Mitigation strategies for CVE-2022-1897 primarily focus on immediate software updates to version 8.2 or later where the vulnerability has been addressed through proper bounds checking implementations. System administrators should prioritize patching affected installations across all platforms where vim is deployed, particularly in server environments, development workstations, and automated systems that process user input through the editor. Additional protective measures include implementing input validation controls, restricting vim usage in privileged contexts, and monitoring for anomalous file processing activities that might indicate exploitation attempts. The remediation process should also involve comprehensive vulnerability assessments to identify all systems running vulnerable versions of vim and ensure proper patch management procedures are in place to prevent similar issues in the future. Organizations should also consider implementing security controls aligned with the ATT&CK framework's mitigation strategies for software exploitation techniques, particularly focusing on input validation and privilege separation to reduce the attack surface for such vulnerabilities.