CVE-2026-76925: Time-of-check Time-of-use (TOCTOU) Race Condition in Red Hat Red Hat Enterprise Linux 10
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.
CVE-2026-76925: Time-of-check Time-of-use (TOCTOU) Race Condition in Red Hat Red Hat Enterprise Linux 10
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.
CVSS v3.1
Score 5.8medium
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-08-19T22:57:38.204Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-76925","vendor":"Red Hat"}]
Threat ID: 6a9b36afacd9273b4946fe4e
Added to database: 09/04/2026, 21:22:55 UTC
Last updated: 09/04/2026, 22:07:20 UTC
Views: 6
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