CVE-2026-76925

Published: Sep 4, 2026Modified: Sep 4, 2026

5.8

Vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L

Exploitability: 1.0 / Impact: 4.7

Source: secalert@redhat.com

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.

Related CWEs

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.

References (2)

https://access.redhat.com/security/cve/CVE-2026-76925

Source: secalert@redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2520099

Source: secalert@redhat.com

Timeline

No history available yet.