CVE-2022-3134 in vim
Summary
by MITRE • 09/07/2022
Use After Free in GitHub repository vim/vim prior to 9.0.0388.
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Analysis
by VulDB Data Team • 05/10/2026
This vulnerability represents a use-after-free condition in the popular vim text editor repository, specifically affecting versions prior to 9.0.0388. The flaw occurs when the software attempts to access memory that has already been freed, creating a potential exploitation vector for malicious actors. Such vulnerabilities typically arise from improper memory management where the program fails to properly track object lifetimes and references. The vulnerability is classified under CWE-416 which specifically addresses the use of freed memory, making it a critical concern for system security. When a user opens a maliciously crafted file or encounters specific editing scenarios, the application may attempt to reference memory that has already been deallocated, potentially leading to arbitrary code execution or denial of service conditions.
The technical implementation of this use-after-free vulnerability involves the editor's handling of memory allocations during file processing and text manipulation operations. Attackers can craft specific input files that trigger the vulnerable code path, causing the application to free memory associated with certain data structures while simultaneously maintaining references to those structures. This creates a window where the freed memory can be reallocated and modified by other processes, leading to unpredictable behavior when the original code attempts to access the freed memory location. The vulnerability is particularly dangerous because vim is widely used across multiple platforms and environments, making it an attractive target for exploit development. The flaw can be exploited through various attack vectors including file processing, remote code execution, and privilege escalation scenarios, especially when vim is used in automated systems or with untrusted input.
The operational impact of this vulnerability extends beyond simple exploitation to encompass broader security implications for systems relying on vim for text processing. Organizations using vulnerable versions of vim face potential risks including unauthorized code execution, data corruption, and system compromise when users interact with malicious content. The vulnerability affects both local and remote attack scenarios, as it can be triggered through file-based attacks, web-based editing sessions, or automated processing pipelines where vim is invoked with untrusted input. From an attack perspective, this vulnerability aligns with ATT&CK techniques involving privilege escalation and execution through software exploitation, as attackers can leverage the use-after-free condition to gain elevated privileges or execute malicious code within the application context. The widespread adoption of vim across Unix-like systems, Windows environments, and containerized deployments amplifies the potential impact, as the vulnerability affects a critical component of many software development and system administration workflows.
Mitigation strategies for this vulnerability involve immediate patching of affected installations to version 9.0.0388 or later, which contains the necessary memory management fixes. System administrators should prioritize updating vim installations across all environments where the editor is used, particularly in development, testing, and production systems. Additional protective measures include implementing input validation for files processed by vim, restricting vim execution in privileged contexts, and monitoring for suspicious file processing activities. Security teams should also consider deploying application whitelisting policies that restrict vim usage to trusted environments and ensure proper sandboxing when processing untrusted content. The vulnerability demonstrates the critical importance of proper memory management in software development and highlights the necessity of thorough code review processes, particularly for applications handling user input. Organizations should implement comprehensive vulnerability management programs that include regular security assessments, automated patch deployment, and continuous monitoring for similar memory-related issues in other software components.