Unrated severityNVD Advisory· Published Jul 9, 2025· Updated Jul 28, 2025
userns and mnt_idmap leak in open_tree_attr(2)
CVE-2025-38247
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.
Affected products
2- Linux/Linuxv5Range: 6.15
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2News mentions
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