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CVE-2025-38352: Linux Kernel Time-of-Check Time-of-Use (TOCTOU) Race Condition Vulnerability

criticalknown exploitedpublic exploitCVE-2025-38352
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Linux kernel contains a time-of-check time-of-use (TOCTOU) race condition vulnerability that has a high impact on confidentiality, integrity, and availability.

CSIRTS triage

vendor: Linuxproduct: KernelOther
What
The vulnerability is a time-of-check time-of-use (TOCTOU) race condition affecting confidentiality, integrity, and availability.
Who is affected
Users of the Linux kernel.
Urgency
Remediation is urgent due to active exploitation and critical impact.
Action
Apply the latest kernel updates.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-09-04
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-38352

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-38352coverage & exploitation statusNVD · CVE.org

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