CVE-2025-40203

CVE-2025-40203 is a security vulnerability that is still awaiting full analysis and scoring. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

In the Linux kernel, the following vulnerability has been resolved: listmount: don't call path_put() under namespace semaphore Massage listmount() and make sure we don't call path_put() under the namespace semaphore. If we put the last reference we're fscked.

Frequently asked questions

What is CVE-2025-40203?
In the Linux kernel, the following vulnerability has been resolved: listmount: don't call path_put() under namespace semaphore Massage listmount() and make sure we don't call path_put() under the namespace semaphore. If we put the last reference we're fscked.
Is CVE-2025-40203 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-40203?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-40203 have an EU (EUVD) identifier?
Yes. CVE-2025-40203 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-150371.
When was CVE-2025-40203 published?
CVE-2025-40203 was published on 2025-11-12 and last updated on 2026-06-17.

References