Description
A flaw was found in Flatpak. A Time-of-check to time-of-use (TOCTOU) race condition exists in the `org.freedesktop.Flatpak.SystemHelper` component. This vulnerability occurs because a privileged `chmod` operation executes before the OSTree repository validation within the `Deploy()` function. An attacker can exploit this timing window to redirect symlinks to arbitrary files, potentially leading to unauthorized file manipulation or information disclosure.
Metrics
CVSS 3.1 5.8/10
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:LWeakness enumeration
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
No affected versions have been published.
Timeline
- Published
- Sep 4, 2026
- Last modified
- Sep 8, 2026
- NVD status
- Awaiting Analysis