CVE-2025-38247 — Missing Release of Resource after Effective Lifetime in Linux
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 92.28%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJul 9
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6
Affected Packages3 packages
▶CVEListV5linux/linuxc4a16820d90199409c9bf01c4f794e1e9e8d8fd8 — 142db4e76110dd80239f4e79810f85ea1735ad60+2
Patches
🔴Vulnerability Details
2OSV▶
CVE-2025-38247: 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 retur↗2025-07-09
GHSA▶
GHSA-3w4f-86g3-p6vp: 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 ret↗2025-07-09