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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.

PUBLISHED Reserved 2025-04-16 | Published 2025-07-09 | Updated 2026-05-11 | Assigner Linux

Product status

Default status
unaffected

c4a16820d90199409c9bf01c4f794e1e9e8d8fd8 (git) before 142db4e76110dd80239f4e79810f85ea1735ad60
affected

c4a16820d90199409c9bf01c4f794e1e9e8d8fd8 (git) before 0748e553df0225754c316a92af3a77fdc057b358
affected

Default status
affected

6.15
affected

Any version before 6.15
unaffected

6.15.5 (semver)
unaffected

6.16 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/142db4e76110dd80239f4e79810f85ea1735ad60

git.kernel.org/...c/0748e553df0225754c316a92af3a77fdc057b358

cve.org (CVE-2025-38247)

nvd.nist.gov (CVE-2025-38247)

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