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Linux Kernel CVE-2025-38412

MEDIUM
2025-07-25 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Information Disclosure Linux Debian Red Hat Dell Debian Linux Suse
5.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
5.5 MEDIUM

Local sysfs access requires standard user privileges (PR:L, AV:L); kernel crash yields A:H with no confidentiality or integrity impact.

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
6.1 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jul 30, 2026 - 08:53 vuln.today
CVE Published
Jul 25, 2025 - 14:15 nvd
MEDIUM 5.5

DescriptionNVD

In the Linux kernel, the following vulnerability has been resolved:

platform/x86: dell-wmi-sysman: Fix WMI data block retrieval in sysfs callbacks

After retrieving WMI data blocks in sysfs callbacks, check for the validity of them before dereferencing their content.

AnalysisAI

Denial of service in the Linux kernel's dell-wmi-sysman platform driver allows a local low-privileged user to crash the system by triggering an invalid pointer dereference in sysfs callbacks. The driver fails to validate WMI data block pointers after retrieval before dereferencing them, affecting Dell hardware running unpatched kernel versions including the 6.16-rc series and Debian Linux 11.0. No active exploitation has been confirmed - EPSS sits at the 5th percentile and the vulnerability is absent from CISA KEV, making this a low-urgency patch for most environments.

Technical ContextAI

The dell-wmi-sysman module is a platform/x86 Linux kernel driver that surfaces Dell BIOS and firmware configuration attributes through the sysfs virtual filesystem via WMI (Windows Management Instrumentation) data blocks. When sysfs read or write callbacks invoke WMI to retrieve these data blocks, the driver previously did not check the returned pointer for validity before dereferencing it. This constitutes a null or invalid pointer dereference flaw (consistent with CWE-476), where a failed WMI query returning a null or garbage block reference causes a kernel oops or panic. CPE data confirms the affected product is cpe:2.3:o:linux:linux_kernel across multiple stable branches, with explicit enumeration of 6.16-rc1 through 6.16-rc4, as well as Debian Linux 11.0. The fix adds mandatory validity checks between retrieval and dereference in all affected sysfs callbacks.

RemediationAI

Apply the upstream kernel patches published across six commits targeting multiple stable branches: the primary references are https://git.kernel.org/stable/c/0deb3eb78ebf225cb41aa9b2b2150f46cbfd359e, https://git.kernel.org/stable/c/5df3b870bc389a1767c72448a3ce1c576ef4deab, https://git.kernel.org/stable/c/68e9963583d11963ceca5d276e9c44684509f759, and the remaining three commits at the same tree. Exact patched release version numbers per stable branch are not independently confirmed beyond the commit references - users should pull the latest stable kernel point release for their branch. Debian Bullseye users should apply the update announced at https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html. If immediate patching is not possible on affected Dell Linux systems, unloading the dell-wmi-sysman kernel module via 'modprobe -r dell-wmi-sysman' eliminates the attack surface; the trade-off is loss of BIOS attribute management through sysfs for Dell-specific settings until the module is reloaded or the system is patched.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
Container suse/hpc/warewulf4-x86_64/sle-hpc-node:15.6.17.8.103 Image SLES15-SP6 Image SLES15-SP6-BYOS Image SLES15-SP6-BYOS-Azure Image SLES15-SP6-BYOS-EC2 Image SLES15-SP6-BYOS-GCE Image SLES15-SP6-CHOST-BYOS Image SLES15-SP6-CHOST-BYOS-Aliyun Image SLES15-SP6-CHOST-BYOS-Azure Image SLES15-SP6-CHOST-BYOS-EC2 Image SLES15-SP6-CHOST-BYOS-GCE Image SLES15-SP6-CHOST-BYOS-GDC Image SLES15-SP6-CHOST-BYOS-SAP-CCloud Image SLES15-SP6-EC2 Image SLES15-SP6-EC2-ECS-HVM Image SLES15-SP6-GCE Image SLES15-SP6-HPC-BYOS Image SLES15-SP6-HPC-BYOS-Azure Image SLES15-SP6-HPC-BYOS-EC2 Image SLES15-SP6-HPC-BYOS-GCE Image SLES15-SP6-HPC-EC2 Image SLES15-SP6-HPC-GCE Image SLES15-SP6-Hardened-BYOS Image SLES15-SP6-Hardened-BYOS-Azure Image SLES15-SP6-Hardened-BYOS-EC2 Image SLES15-SP6-Hardened-BYOS-GCE Image SLES15-SP6-SAP Image SLES15-SP6-SAP-Azure Image SLES15-SP6-SAP-EC2 Image SLES15-SP6-SAP-GCE Image SLES15-SP6-SAPCAL Image SLES15-SP6-SAPCAL-Azure Image SLES15-SP6-SAPCAL-EC2 Image SLES15-SP6-SAPCAL-GCE Affected
Container suse/sl-micro/6.0/base-os-container:2.1.3-7.44 Container suse/sl-micro/6.1/base-os-container:2.2.1-5.27 Image SL-Micro Image SL-Micro-Azure Image SL-Micro-BYOS-Azure Image SL-Micro-BYOS-EC2 Image SL-Micro-BYOS-GCE Image SL-Micro-EC2 Image SLE-Micro Image SLE-Micro-Azure Image SLE-Micro-BYOS Image SLE-Micro-BYOS-Azure Image SLE-Micro-BYOS-EC2 Image SLE-Micro-BYOS-GCE Image SLE-Micro-EC2 Image SLE-Micro-GCE Image SUSE-Multi-Linux-Manager-Proxy-BYOS-Azure Image SUSE-Multi-Linux-Manager-Proxy-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Proxy-BYOS-GCE Image SUSE-Multi-Linux-Manager-Server-Azure-llc Image SUSE-Multi-Linux-Manager-Server-Azure-ltd Image SUSE-Multi-Linux-Manager-Server-BYOS-Azure Image SUSE-Multi-Linux-Manager-Server-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Server-BYOS-GCE Image SUSE-Multi-Linux-Manager-Server-EC2-llc Image SUSE-Multi-Linux-Manager-Server-EC2-ltd Affected
Container suse/sl-micro/6.0/kvm-os-container:2.1.3-6.67 Container suse/sl-micro/6.1/kvm-os-container:2.2.1-5.29 Affected
Container suse/sl-micro/6.0/rt-os-container:2.1.3-7.76 Container suse/sl-micro/6.1/rt-os-container:2.2.1-5.14 Affected
Image SLES-Azure-3P Image SLES-Azure-Basic Image SLES-Azure-Standard Image SLES-BYOS-Azure Image SLES-BYOS-EC2 Image SLES-BYOS-GCE Image SLES-CHOST-BYOS-Aliyun Image SLES-CHOST-BYOS-Azure Image SLES-CHOST-BYOS-EC2 Image SLES-CHOST-BYOS-GCE Image SLES-CHOST-BYOS-GDC Image SLES-CHOST-BYOS-SAP-CCloud Image SLES-EC2 Image SLES-EC2-ECS Image SLES-GCE Image SLES-GCE-3P Image SLES-Hardened-BYOS-Azure Image SLES-Hardened-BYOS-EC2 Image SLES-Hardened-BYOS-GCE Image SLES-SAPCAL-Azure Image SLES-SAPCAL-EC2 Image SLES-SAPCAL-GCE Affected

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CVE-2025-38412 vulnerability details – vuln.today
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