CVE-2022-1968 in vim
Summary
by MITRE • 06/02/2022
Use After Free 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-2022-1968 represents a critical use-after-free condition within the vim text editor repository prior to version 8.2. This type of vulnerability occurs when a program continues to reference memory after it has been freed, creating potential avenues for arbitrary code execution. The issue manifests in the vim editor's handling of specific memory allocation patterns during normal operation, particularly when processing certain file formats or executing commands that trigger memory management operations.
The technical flaw stems from improper memory management within vim's internal codebase where allocated memory blocks are not properly validated before subsequent access operations. This use-after-free condition typically arises when the editor processes complex file structures or executes commands that manipulate memory regions without adequate bounds checking or reference validation. The vulnerability is categorized under CWE-416 which specifically addresses the use of freed memory, making it a direct descendant of well-known memory safety issues that have plagued software systems for decades. The flaw exists in the editor's core memory management routines and can be triggered through normal editing operations.
The operational impact of CVE-2022-1968 extends beyond simple memory corruption, as it creates potential for remote code execution when an attacker can control the input processed by vim. This vulnerability can be exploited in scenarios where vim processes untrusted files or when users open maliciously crafted documents. The attack surface includes web-based editors, automated processing systems, and any environment where vim handles external input without proper sanitization. According to ATT&CK framework category T1203, this vulnerability could enable privilege escalation and persistent access through code injection techniques, making it particularly dangerous in enterprise environments where vim is commonly used for system administration tasks.
Mitigation strategies for CVE-2022-1968 primarily focus on immediate patching of vim installations to version 8.2 or later where the memory management issues have been resolved. Organizations should implement comprehensive patch management policies that prioritize security updates for core system tools like vim. Additionally, input validation measures should be enforced through sandboxing mechanisms and restricted execution environments when vim processes untrusted content. Security monitoring should include detection of anomalous memory access patterns and potential exploitation attempts. The vulnerability highlights the importance of regular security audits and memory safety reviews in software development practices, particularly for widely-used system utilities that handle diverse input formats. System administrators should also consider implementing network segmentation and access controls to limit potential exploitation vectors, while maintaining detailed logging of vim usage patterns for security analysis purposes.