Linux Kernel Time-of-Check Time-of-Use (TOCTOU) Race Condition Vulnerability (CVE-2025-38352)
Severity: high · Patch status: patched · Since 2025-09-04 · CVE-2025-38352
Linux kernel contains a time-of-check time-of-use (TOCTOU) race condition vulnerability that has a high impact on confidentiality, integrity, and availability. CISA added CVE-2025-38352 to its Known Exploited Vulnerabilities catalog on Sep 4, 2025, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Sep 25, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
