CVE-2025-38247

MEDIUM EPSS 2.1%
Published Jul 9, 202511mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jul 9, 2025 11mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥6.15  –  <6.15.5
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any
linuxlinux_kernel6.16any

References 2

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

Remediation

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