AIKIDO-2026-898934
flatpak is vulnerable to Link Following
52
Medium Risk
This Affects:
flatpakTL;DR
When regenerating the runtime linker cache, Flatpak writes to ~/.var/app/$appid/.ld.so, a path a sandboxed app fully controls. A malicious app can replace that file with a symlink so that the cache regeneration writes its output at an arbitrary location outside the sandbox. The filename and content are fixed, which limits exploitability, but the write still escapes the sandbox. The fix hardens the symlink switch and cache regeneration to use fd-based operations.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
flatpak is vulnerable to Link Following in versions 0.0.1 - 1.18.0.
How to fix this
Upgrade the flatpak library to the patch version.
Are You Affected?
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SOC 2Compliant
ISO 27001Compliant