CVE-2025-38247
Last modified
CVE-2025-38247 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 0.12% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 6.15, < 6.15.5 | — |
| Linux | Linux Kernel | 6.16 | Rc1 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-38247?
How severe is CVE-2025-38247?
How do I fix CVE-2025-38247?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2025
- CVE-2025-38241In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-38242In the Linux kernel, the following vulnerability has been re…4.7
- CVE-2025-38243In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-38244In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-38245In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2025-38246In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-38248In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2025-38249In the Linux kernel, the following vulnerability has been re…7.1
- CVE-2025-3825A vulnerability, which was classified as problematic, has be…4.1
- CVE-2025-38250In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2025-38251In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-38252In the Linux kernel, the following vulnerability has been re…5.5
Are you affected by CVE-2025-38247?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST