CVE-2022-2874 in vim
Summary
by MITRE • 08/18/2022
NULL Pointer Dereference in GitHub repository vim/vim prior to 9.0.0223.
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Analysis
by VulDB Data Team • 05/28/2026
The vulnerability identified as CVE-2022-2874 represents a critical null pointer dereference flaw discovered in the popular Vim text editor repository maintained by GitHub. This vulnerability affects versions of Vim prior to 9.0.0223 and stems from improper handling of memory references during specific operational conditions. The flaw manifests when the software attempts to access a memory location through a null pointer, which can lead to unexpected program termination or system instability. Such vulnerabilities are particularly concerning in text editing applications that are widely deployed across diverse computing environments and used by developers, system administrators, and end users who may not be aware of potential security implications. The vulnerability exists within the core functionality of Vim's codebase and represents a fundamental issue in memory management that could be exploited by malicious actors to disrupt normal operations.
The technical implementation of this null pointer dereference occurs within Vim's internal processing mechanisms where certain functions fail to properly validate pointer states before attempting memory access operations. When specific user inputs or file processing scenarios are encountered, the application attempts to dereference a pointer that has not been properly initialized or has been explicitly set to null, resulting in a segmentation fault or access violation. This type of vulnerability falls under the CWE-476 category of NULL Pointer Dereference, which is classified as a common weakness in software development practices. The flaw typically occurs in contexts where conditional logic fails to account for all possible pointer states, particularly when dealing with dynamically allocated memory or complex data structures that may not always contain valid references. The vulnerability's exploitation requires specific input conditions that trigger the problematic code path, making it somewhat more targeted than other types of memory corruption vulnerabilities.
The operational impact of CVE-2022-2874 extends beyond simple application crashes, as it can potentially enable more sophisticated attack vectors depending on the execution environment. When exploited, this vulnerability can cause denial of service conditions that may disrupt critical development workflows or system administration tasks where Vim is extensively used. In server environments where Vim serves as a primary text editing tool for configuration management or automated processes, such a vulnerability could lead to significant operational disruptions. The vulnerability also presents potential for privilege escalation scenarios, particularly when Vim is executed with elevated privileges or in environments where it serves as a component of larger security or automation frameworks. From an attacker's perspective, this vulnerability aligns with ATT&CK technique T1059.001 for command and scripting interpreter usage, as it could be leveraged to gain unauthorized access to systems or compromise the integrity of text-based development environments.
Mitigation strategies for CVE-2022-2874 primarily involve immediate patching of affected Vim installations to version 9.0.0223 or later, which contains the necessary code modifications to prevent null pointer dereference conditions. System administrators should prioritize updating all instances of Vim across their infrastructure, particularly in environments where the editor is used for critical system management tasks. Additional protective measures include implementing proper input validation for all file processing operations, enabling sandboxing mechanisms when executing Vim in untrusted environments, and conducting regular security assessments of text editing tools used in production systems. Organizations should also consider implementing network segmentation and access controls to limit potential exploitation of this vulnerability, as well as establishing incident response procedures that account for denial of service scenarios involving critical text processing tools. The fix addresses the root cause by ensuring proper null pointer validation and memory state management throughout the application's processing flow, aligning with industry best practices for secure coding and memory management.