CVE-2025-38499

MEDIUM EPSS 3.5%
Published Aug 11, 202510mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Aug 11, 2025 10mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns What we want is to verify there is that clone won't expose something hidden by a mount we wouldn't be able to undo. "Wouldn't be able to undo" may be a result of MNT_LOCKED on a child, but it may also come from lacking admin rights in the userns of the namespace mount belongs to. clone_private_mnt() checks the former, but not the latter. There's a number of rather confusing CAP_SYS_ADMIN checks in various userns during the mount, especially with the new mount API; they serve different purposes and in case of clone_private_mnt() they usually, but not always end up covering the missing check mentioned above.

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
3.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 16

VendorProductVersionRange
linuxlinux_kernel*≥4.4.281  –  <4.5
linuxlinux_kernel*≥4.9.280  –  <4.10
linuxlinux_kernel*≥4.14.244  –  <4.15
linuxlinux_kernel*≥4.19.204  –  <4.20
linuxlinux_kernel*≥5.4.141  –  <5.5
linuxlinux_kernel*≥5.10.59  –  <5.11
linuxlinux_kernel*≥5.13.11  –  <5.14
linuxlinux_kernel*≥5.14.1  –  <5.15.190
linuxlinux_kernel*≥5.16  –  <6.1.147
linuxlinux_kernel*≥6.2  –  <6.6.100
linuxlinux_kernel*≥6.7  –  <6.12.40
linuxlinux_kernel*≥6.13  –  <6.15.3
linuxlinux_kernel5.14any
linuxlinux_kernel5.14any
linuxlinux_kernel5.14any
debiandebian_linux11.0any

References 8

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-082556.html
  • git.kernel.org https://git.kernel.org/stable/c/36fecd740de2d542d2091d65d36554ee2bcf9c65
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/38628ae06e2a37770cd794802a3f1310cf9846e3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c28f922c9dcee0e4876a2c095939d77fe7e15116
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d717325b5ecf2a40daca85c61923e17f32306179
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dc6a664089f10eab0fb36b6e4f705022210191d2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e77078e52fbf018ab986efb3c79065ab35025607
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
    Third Party Advisory

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/36fecd740de2d542d2091d65d36554ee2bcf9c65
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/38628ae06e2a37770cd794802a3f1310cf9846e3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c28f922c9dcee0e4876a2c095939d77fe7e15116
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d717325b5ecf2a40daca85c61923e17f32306179
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/dc6a664089f10eab0fb36b6e4f705022210191d2
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e77078e52fbf018ab986efb3c79065ab35025607
    Patch