VYPR
← All advisories
Medium severity5.5NVD Advisory· Published Aug 11, 2025· Updated Jun 17, 2026

CVE-2025-38499

CVE-2025-38499

Description

In the Linux kernel, the following vulnerability has been resolved:

clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns

What we want is to verify there is that clone won't expose something hidden by a mount we wouldn't be able to undo. "Wouldn't be able to undo" may be a result of MNT_LOCKED on a child, but it may also come from lacking admin rights in the userns of the namespace mount belongs to.

clone_private_mnt() checks the former, but not the latter.

There's a number of rather confusing CAP_SYS_ADMIN checks in various userns during the mount, especially with the new mount API; they serve different purposes and in case of clone_private_mnt() they usually, but not always end up covering the missing check mentioned above.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

407

Patches

Vulnerability mechanics

References

8

News mentions

0

No linked articles in our index yet.