CVE-2025-39754: mm/smaps: fix race between smaps_hugetlb_range and migration
CSIRTS triage
- What
- Race condition exists between smaps_hugetlb_range and page migration, potentially causing memory corruption or information disclosure.
- Who is affected
- Systems with huge pages enabled where concurrent smaps reading and page migration occur.
- Urgency
- Medium priority; race condition affects memory tracking reliability, though not currently exploited.
- Action
- Apply Linux kernel patch synchronizing smaps_hugetlb_range with migration, or update to a patched kernel version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-39754
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.
- Low exploitation riskCVE-2025-397540.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-39754 | coverage & exploitation status | NVD · CVE.org |
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