Bug 2481091 (CVE-2026-48831)

Summary: CVE-2026-48831 wine: Wine: Sandbox escape via blind execution of EXE files
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Wine. Wine's desktop file registers itself to handle Windows executable (EXE) files. In some configurations, opening an EXE file can cause it to run automatically with the user's permissions, without further prompts. This allows an attacker to bypass security sandboxes like Flatpak and Snap, potentially leading to unauthorized code execution and increased privileges on the system.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2481183, 2481184    
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Description OSIDB Bzimport 2026-05-24 22:01:10 UTC 
Wine ships a .desktop file that registers itself as a MIME handler for EXE files and several other Windows executable file types. In some configurations, handling of an EXE file causes that file to be blindly executed with the permissions of the invoker. This allows escaping Flatpak and Snap sandboxes, because MIME handlers are not intended for use by code interpreters and loaders. NOTE: some parties feel that this is not a bug to be addressed in Wine, because there is no known solution that avoids a severe loss of usability (Wine could be a binfmt-misc handler, but binfmt-misc does not exist on all platforms supported by Wine).