Critical Security Flaw in Vim Packages: Arbitrary Code Execution and Denial of Service
Summary
ALSA-2026:7711: Important: vim security update. Affects vim-X11 versions < 2:9.1.083-6.el10_1.3. Fixed in 2:9.1.083-6.el10_1.3. How to fix ↓
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Background
Vim (Vi IMproved) is a widely used text editor that enhances the capabilities of the original vi editor. It is known for its efficiency and extensibility, making it a favorite among developers and system administrators. However, recent vulnerabilities have been identified in various Vim packages, including vim-X11, vim-common, vim-data, vim-enhanced, vim-filesystem, vim-minimal, and xxd, which could lead to severe security risks such as arbitrary code execution and denial of service.
Vulnerability Detail
The vulnerabilities stem from multiple issues within the Vim editor, particularly in the netrw plugin and the glob() function. The first vulnerability allows for arbitrary code execution via OS command injection, which can be exploited by an attacker to execute malicious commands on the host system. The second vulnerability leads to denial of service and information disclosure through crafted swap files, potentially exposing sensitive data. Lastly, the command injection vulnerability in the glob() function also permits arbitrary code execution, compounding the risks associated with these flaws.
How To Fix
Minimum fixed version
2:9.1.083-6.el10_1.3
This is the first release that contains the fix.
sudo dnf update vim-X11Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can disable the netrw plugin in Vim to mitigate the risk of exploitation until the packages are updated. This can be done by adding the following line to your .vimrc configuration file: 'let g:loaded_netrwPlugin = 1'.
Conclusion
The identified vulnerabilities in Vim pose significant security risks, including arbitrary code execution and denial of service. It is crucial for users to update their Vim packages to the latest patched version to safeguard their systems. Additionally, utilizing tools like Vulert can help monitor for such vulnerabilities in real-time.
See every vulnerability recorded for vim-X11 →
FAQ
The main vulnerabilities include arbitrary code execution via OS command injection, denial of service through crafted swap files, and command injection in the glob() function.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. By uploading your manifest file, you can quickly determine if your application is affected.
If immediate updates are not possible, consider disabling the netrw plugin as a temporary workaround to reduce the risk of exploitation.
While specific exploits may not be publicly disclosed, the nature of the vulnerabilities allows for potential exploitation by attackers familiar with Vim's architecture.
For detailed information, refer to the CVE pages associated with the vulnerabilities: CVE-2026-28417, CVE-2026-28421, and CVE-2026-33412.
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