Bug 2539621

Summary: CVE-2026-96807 flatpak: Flatpak: Low integrity or availability impact via symlink manipulation [fedora-43]
Product: [Fedora] Fedora Reporter: Vladimir Vasilev <vvasilev>
Component: flatpakAssignee: David King <amigadave>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 43CC: amigadave, debarshir, gnome-sig, kalevlember, renner0
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["272fd745-7eba-4179-8672-1577a735baec"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On:    
Bug Blocks: 2539543    

Description Vladimir Vasilev 2026-09-23 18:24:57 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

In Flatpak before 1.18.1, a malicious sandboxed app can replace ~/.var/app/$appid/.ld.so with a symlink, causing regenerate_ld_cache to write files at an arbitrary location. The filenames and content are not attacker controlled, making this hard to exploit.