Time-of-check Time-of-use (TOCTOU) Race Condition in PackageKit - CVE-2026-41651
Published: April 23, 2026 / Updated: May 22, 2026
Vulnerability identifier: #VU126937
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2026-41651
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vendor: Richard Hughes
Affected software:
PackageKit
PackageKit
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to a time-of-check time-of-use race condition in PackageKit when installing packages. A local user can win a race condition to install arbitrary packages as root to escalate privileges.
How to mitigate CVE-2026-41651
Install security update from vendor's website.