Time-of-check Time-of-use (TOCTOU) Race Condition in Xen - CVE-2025-58151
Published: January 27, 2026
Vulnerability identifier: #VU122071
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:U/U:Clear
CVE-ID: CVE-2025-58151
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Xen Project
Affected software:
Xen
Xen
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in varstored. A local user with kernel level access in a VM can escalate privilege via gaining code execution within varstored.
How to mitigate CVE-2025-58151
Install updates from vendor's website.