UBUNTU-CVE-2026-76925
Dashboard / Vulnerabilities / UBUNTU-CVE-2026-76925
Summary:
Details: 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.
References: https://ubuntu.com/security/CVE-2026-76925, https://www.cve.org/CVERecord?id=CVE-2026-76925
Affected packages
Package
Name: flatpak
Purl: pkg:deb/ubuntu/flatpak?arch=source&distro=esm-apps%2Fbionic
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -None
Affected versions
0.8.7-5
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
