Security Advisory

CVE-2025-38247

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2025-07-09 10:42:28

Last updated 2026-05-11 21:24:06

Assigner Linux

State PUBLISHED

Description

In the Linux kernel, the following vulnerability has been resolved: userns and mnt_idmap leak in open_tree_attr(2) Once want_mount_setattr() has returned a positive, it does require finish_mount_kattr() to release ->mnt_userns. Failing do_mount_setattr() does not change that. As the result, we can end up leaking userns and possibly mnt_idmap as well.

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