Time-of-check Time-of-use (TOCTOU) Race Condition Affecting xapi-project/varstored package, versions [,1.3.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-XAPIPROJECTVARSTORED-17912417
- published9 Jul 2026
- disclosed9 Jul 2026
- creditUnknown
Introduced: 9 Jul 2026
CVE-2025-58151 (opens in a new tab)How to fix?
Upgrade xapi-project/varstored to version 1.3.2 or higher.
Overview
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition in the communication process with OVMF involving mapped guest memory. An attacker can manipulate an index used in a jump table by exploiting a race condition between the time a buffer is checked and the time it is used, potentially leading to unauthorized code execution or data corruption.