Critical Security Vulnerability in Vim: Multiple Denial of Service and Arbitrary Code Execution Risks
Summary
RLSA-2026:66336: Important: vim security update. Affects vim versions < 2:9.1.083-9.el10_2.20. Fixed in 2:9.1.083-9.el10_2.20. How to fix ↓
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Background
Vim (Vi IMproved) is a highly configurable text editor built to enable efficient text editing. It is widely used by developers and system administrators for its powerful features and extensibility. However, recent vulnerabilities have been identified that could lead to severe security risks, including denial of service and arbitrary code execution, impacting users who rely on this tool for their daily tasks.
Vulnerability Detail
The vulnerabilities in Vim stem from improper handling of crafted inputs, including Unicode characters and spell files, leading to information disclosure and denial of service. Specific issues include out-of-bounds writes, heap buffer overflows, and insecure command handling, which can allow attackers to execute arbitrary commands or crash the editor. The vulnerabilities are tracked under multiple CVEs, with a CVSS score of 8.8 indicating a high severity level.
How To Fix
Minimum fixed version
2:9.1.083-9.el10_2.20
This is the first release that contains the fix.
sudo dnf update vimTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can avoid opening untrusted files or using crafted inputs in Vim until the package is updated. Additionally, disabling certain features related to spell checking and external command execution may reduce exposure to these vulnerabilities.
Conclusion
The recent security vulnerabilities in Vim pose significant risks to users, including potential denial of service and arbitrary code execution. It is crucial for users to update to the latest patched version to mitigate these risks. Awareness of the vulnerabilities and following best practices can help maintain a secure environment while using Vim.
See every vulnerability recorded for vim →
FAQ
The CVSS score of the vulnerabilities in Vim is 8.8, indicating a high severity level.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
The vulnerabilities include denial of service via crafted inputs, out-of-bounds writes, and arbitrary code execution through insecure command handling.
If you cannot update Vim immediately, avoid opening untrusted files and consider disabling features that may expose you to these vulnerabilities.
More information about the security issues can be found on the CVE pages listed in the references section of the vulnerability advisory.
References
Related vulnerabilities
Recent vulnerabilities recorded for vim.
