High 7.8Published Nov 12, 2025

CVE-2025-40203listmount: don't call path_put() under namespace semaphore

Updated under an hour ago (Oct 26, 2026, 9:40 PM ET)

Does this affect you?

It affects Linux. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from b4c2bea8ceaa50cd42a8f73667389d801a3ecf2d before 659874b7ee4976ad9ce476e07fd36bc67b3537f1; from b4c2bea8ceaa50cd42a8f73667389d801a3ecf2d before 9c80da26fda2fdcaac7f92b5908875b3108830ff; from b4c2bea8ceaa50cd42a8f73667389d801a3ecf2d before c1f86d0ac322c7e77f6f8dbd216c65d39358ffc0	CNA record

References

References

https://git.kernel.org/stable/c/659874b7ee4976ad9ce476e07fd36bc67b3537f1
https://git.kernel.org/stable/c/9c80da26fda2fdcaac7f92b5908875b3108830ff
https://git.kernel.org/stable/c/c1f86d0ac322c7e77f6f8dbd216c65d39358ffc0

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.