CVE-2025-38247 Information

Jul 10, 2025 cve

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.

Reference

https://git.kernel.org/stable/c/0748e553df0225754c316a92af3a77fdc057b358 https://git.kernel.org/stable/c/142db4e76110dd80239f4e79810f85ea1735ad60

CNNVD-202507-1284 (Published: 2025-07-09)

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